Circular26M9REV2

Emissions Service Action
Code: 26M9
REVISION
Subject
Release Date
Revision Summary
Reducing Agent Injector and SCR Catalyst (Parts Catalog Error)
December 06, 2019
Removed the need for particle sensor plug
Affected Vehicles
Country
Beginning
Model Year
Ending
Model Year
Vehicle
Vehicle
Count
USA
CAN
2010
2011
2013
2012
Q7
Q7
12
2
Check Campaigns/Actions screen in Elsa on the day of repair to verify that a VIN qualifies for repair under this
action. Elsa is the only valid campaign inquiry & verification source.

Campaign status must show “open.”

If Elsa shows other open action(s), inform your customer so that the work can also be completed at
the same time the vehicle is in the workshop for this campaign.
Problem Description
Due to a parts catalog error, incorrect emissions related component(s) may have been installed
on some vehicles during a past service repair visit. Dealers will inspect and, if needed, replace
the component(s) as a proactive measure to ensure continued emissions compliance.
Corrective Action
Inspect and, if needed, replace the component(s) as a proactive measure to ensure continued
emissions compliance.
IMPORTANT! AEM Not
Required To Receive
This Repair
This action is fully independent of the approved diesel modification recall on affected
vehicles. For customer convenience, this action can be performed at the same time as
other service work, but can also be done independent of the diesel modification (AEM).
Customers do not need to receive the diesel modification (AEM) in order to receive this
repair.
Parts Information
Parts Control Type:
VIN to order
Due to the small number of affected vehicles there will not be
a parts allocation. Please reference the Repair Projection
Tool (below) to view your potential VIN population.
If parts are needed to support a vehicle repair:
• US Dealers - use AVA
• CAN Dealers - contact the Parts Specialists via phone
(800-767-6552), email
([email protected]), or chat/text with
the VIN to order
Criteria
02
02
ALL
Description
(per POC)
4L0-254-400-AX
Catalyst
7L8-254-400-RX
Catalyst
ALL OTHERS
Part Number
Qty. per
Vehicle
1
1
Ordering Method
VIN to Order
VIN to Order
Free Order
Repair Projection Tool (right click to open):
Dealers are urged to order parts only to support scheduled customer repairs.
Dealers must ensure these customer repairs are scheduled so that the correct parts are on
hand at the dealership when the customer presents their vehicle for this service.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 1 of 22
Code Visibility
On or about November 20, 2019, the campaign code was applied to the affected vehicles.
Owner Notification
Owner notification will take place in November 2019. Owner letter examples are included in this
bulletin for your reference.
Emissions Campaigns
Requirements
(CALIFORNIA ONLY)
The California Air Resources Board and the Department of Motor Vehicles (DMV) require
emissions-related campaigns to be completed prior to vehicle registration renewal. When
campaign work is done you must provide the owner with a signed “Vehicle Emission Recall –
Proof of Correction” certificate (RC EMISCAVWAU). Order certificates online via the
Compliance Label Ordering portal at www.accessaudi.com.
Additional Information
Please alert everyone in your dealership about this action, including Sales, Service, Parts
and Accounting personnel. Contact Warranty if you have any questions.
Dealers must ensure that every affected inventory vehicle has this campaign completed before
delivery to consumers.
Fill out and affix Campaign Completion Label (CAMP 010 000) after work is complete.
Labels can be ordered at no cost via the Compliance Label Ordering portal at
www.accessaudi.com.
The information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These procedures
are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To determine whether
this information applies, contact an authorized Audi dealer. 2019 Audi Group of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 2 of 22
Claim Entry Instructions
After campaign has been completed, enter claim as soon as possible to help prevent work from being duplicated
elsewhere. Attach the Elsa screen print showing action open on the day of repair to the repair order.
If customer refused campaign work:
 U.S. dealers: Submit the request through Audi Warranty Online under the Campaigns/Update option.
 Canada dealers: Upload the repair order [signed by customer] to Audi WIN/Operations/Campaign Closure.
Service Number
26M9
Damage Code
0099
Parts Vendor Code
Claim Type
002
Sold vehicle: 7 10
Unsold vehicle: 7 90
Causal Indicator
Select labor* as causal for inspection only
OR
Select Injector for Reduction Agent* as causal part
OR
Select Catalyst* as causal part
Vehicle Wash/Loaner
Criteria I.D.
Do not claim wash/loaner under this action
01
Inspect Reducing Agent Injector, correct part present, no further work required
Labor operation:
Quantity
1.00
1.00
2685 01 99*
30 T.U.
Part Number
3C0253725
3C0253115A
Description
Retaining clip
Gasket
-ORInspect Reducing Agent Injector, incorrect part present, replace Reducing Agent
Injector
Labor operation:
Quantity
1.00
1.00
2685 19 99
Part Number
4H0131113A
3C0253725
40 T.U.
Description
Injector for reduction agent*
Retaining clip
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 3 of 22
Criteria I.D.
02
Inspect SCR Catalyst, correct part present, no further work required
Labor operation:
0183 00 99*
30 T.U.
-ORInspect SCR Catalyst, incorrect part present, replace SCR Catalyst
Labor operation:
2673 19 99
Quantity
1.00
-OR-
Part Number
4L0254400AX
Description
Catalyst* (2012 MY ONLY)
1.00
7L8254400RX
Exhaust Pipe With Catalyst And Adapters*
(2010 MY ONLY)
-AND (all model years)1.00
1K0253141J
1.00
3C0253115A
1.00
3C0253725
1.00
7L5253115C
3.00
N 91130802
Up to 3.00
N 01024713
Criteria I.D.
90 T.U.
Dual clamp
Gasket
Retaining clip
Gasket
Shouldered Hex Nut Self-Locking
Screw (if necessary)
01 AND 02
Inspect SCR Catalyst and Reducing Agent Injector, correct parts present, reinstall
injector, no further work required
Labor operation:
Quantity
1.00
1.00
2685 01 99*
Part Number
3C0253725
3C0253115A
40 T.U.
Description
Retaining clip
Gasket
-ORInspect SCR Catalyst and Reducing Agent Injector, incorrect parts present, replace
SCR Catalyst and Reducing Agent Injector
Labor operation:
Quantity
1.00
1.00
1.00
1.00
1.00
3.00
Up to 3.00
2673 20 99
Part Number
4L0254400AX
1K0253141J
3C0253725
4H0131113A
7L5253115C
N 91130802
N 01024713
90 T.U.
Description
Exhaust Pipe With Catalyst And Adapters*
Dual clamp
Retaining clip
Injector for reduction agent
Gasket
Shouldered Hex Nut Self-Locking
Screw (if necessary)
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 4 of 22
Customer Letter Example (United States)




This notice applies to your vehicle: 
Subject:
Emissions Service Action 26M9 - Reducing Agent Injector and/or SCR Catalyst
Dear Audi Owner,
In cooperation with the United States Environmental Protection Agency and the California Air Resources Board, we are
informing you of our decision to conduct an emissions service action on certain 2010-2013 model year Audi Q7 TDI
vehicles. Our records show that you are the owner of a vehicle affected by this action.
Please note: This action is fully independent of the approved diesel modification recall on your vehicle. For your
convenience, this action can be performed at the same time as other service work, but can also be done independent of
the diesel modification. You do not need to receive the diesel modification in order to receive this repair.
What is the issue?
Due to a parts catalog error, incorrect emissions related component(s) may have been
installed on some vehicles during a past service repair visit. Dealers will inspect and, if
needed, replace the component(s) as a proactive measure to ensure continued emissions
compliance.
What will we do?
Your authorized Audi dealer will inspect and, if necessary, install the correct components.
This work will take about two hours to complete and will be performed for you free of
charge. Please keep in mind that your dealer may need additional time for the preparation
of the repair, as well as to accommodate their daily workshop schedule.
What should you do?
In order to limit any possible inconvenience, please contact your authorized Audi dealer as
soon as possible to schedule this service. For your convenience, you can also visit
www.audiusa.com and click on the “Find a Dealer” link to locate a dealer near you and
schedule this service.
Lease vehicles and
address changes
If you are the lessor and registered owner of the vehicle identified in this action, please
forward this letter immediately via first-class mail to the lessee within ten (10) days of receipt.
If you have changed your address or sold the vehicle, please fill out the enclosed prepaid
Owner Reply card and mail it to us so we can update our records.
Important information for
California Vehicle
Owners – California
Regulations
California regulations require that this campaign be completed prior to the time you renew
your vehicle registration. Therefore, please make sure that this campaign is completed
prior to the renewal of your vehicle registration, and that you furnish proof of completion
to the Department of Motor Vehicles (DMV) in the form of a copy of the dealer’s repair order,
including a signed “Proof of Correction” certificate. You obtain this from your dealer after the
campaign has been completed. Please retain the signed “Proof of Correction Certificate”
with your vehicle records. DO NOT MAIL THIS FORM to the DMV, unless requested.
Can we assist you
further?
If your authorized Audi dealer fails or is unable to complete this work free of charge within
a reasonable time, please contact Audi Customer Experience at 1-800-253-2834 or via our
“Contact Us” page at www.audiusa.com.
Checking your vehicle
for open Recalls and
Service Campaigns
To check your vehicle’s eligibility for repair under this or any other recall/service campaign,
please visit the Recall/Service Campaign Lookup tool at www.audiusa.com and enter
your Vehicle Identification Number (VIN).
We apologize for any inconvenience this matter may cause; however we are taking this action to help ensure your vehicle
continues to meet and exceed your expectations.
Sincerely,
Audi Customer Protection
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 5 of 22
Customer Letter Example (CANADA)




This notice applies to your vehicle:   , 
Subject:
Emissions Service Action 26M9 - Reducing Agent Injector
Dear Audi Owner,
This notice is sent to you in accordance with the requirements of the Canadian Environmental Protection Act,
1999. Audi has determined that a defect, which relates to a prescribed emission standard, exists in certain
2011-2012 model year Audi Q7 TDI vehicles. Our records show that you are the owner of a vehicle affected
by this action.
What is the issue?
Due to a parts catalog error, incorrect emissions related component(s) may have
been installed on some vehicles during a past service repair visit. Dealers will
inspect and, if needed, replace the component(s) as a proactive measure to ensure
continued emissions compliance.
What will we do?
Your authorized Audi dealer will inspect and, if necessary, install the correct
component(s). This work will take about two hours to complete and will be
performed for you free of charge. Please keep in mind that your dealer may need
additional time for the preparation of the repair, as well as to accommodate their
daily workshop schedule.
What should you do?
In order to limit any possible inconvenience, please contact your authorized Audi
dealer as soon as possible to schedule this service. On or about November 19,
2019, the necessary repair instructions and parts will be available to your
authorized Audi dealer.
Lease vehicles and
address changes
If you are the lessor and registered owner of the vehicle identified in this action,
please forward this letter immediately via first-class mail to the lessee within ten
(10) days of receipt. If you have changed your address or sold the vehicle, please
fill out the enclosed prepaid Owner Reply card and mail it to us so we can update
our records.
Can we assist you
further?
If your authorized Audi dealer fails or is unable to complete this work free of charge
within a reasonable time, please contact Audi Customer Relations Monday through
Friday from 8AM to 8PM EST at 1-800-822-2834 or via our “Contact Audi Canada”
page at www.audi.ca.
We apologize for any inconvenience this matter may cause; however we are taking this action to help ensure
your vehicle continues to meet and exceed your expectations.
Sincerely,
Audi Customer Protection
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 6 of 22
Campaign Work Procedure
26M9 Emissions Service Action
NOTE
•
These repair instructions may differ from the labor operations and labor times listed in ELSA.
•
Damages resulting from improper repair or failure to follow these work instructions are the dealer’s
responsibility and are not eligible for reimbursement under this action.
•
This procedure must be read in its entirety prior to performing the repair.
•
Due to variations in vehicle equipment and options, the steps/illustrations in this work procedure may not
identically match all affected vehicles.
•
Diagnosis and repair of pre-existing conditions in the vehicle are not covered under this action.
•
When working during extreme temperatures, it is recommended that the vehicle be allowed to acclimate
inside the shop to avoid temperature-related component damage/breakage.
Repair Overview
•
Inspect and if necessary replace:
o
Reducing Agent Injector
-and/or-
o
•
Section A - Check for Previous Repair
•
Section B - Reducing Agent Injector Work Procedure (Criteria 01)
•
Section C - SCR Catalyst Work Procedure (Criteria 02)
•
Section D - Campaign Completion Stamp
•
Section E - Campaign Completion Label
•
Section F - Parts Return
•
Section G - California Only Requirements
SCR Catalyst
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 7 of 22
Required Parts
Criteria
01
Quantity
Part Number
Part Description
1
4H0.131.113.A
Reducing Agent Injector
1
3C0.253.725
Retaining Clamp
-AND/OR-
7L8.254.400.RX
SCR Catalyst (2010 MY)
4L0.254.400.AX
SCR Catalyst (2012 MY)
1
7L5.253.115.C
Gasket
1
3C0.253.115.A
Reducing Agent Injector Gasket
1
3C0.253.725
Retaining Clamp
1
1K0.253.141.J
Dual Clamp
3
N 01024713
Replacement Stud/Bolt
3
N 91130802
Shouldered Hex Nut
1
02
NOTE
The specified part numbers reflect the status at the start of this service action. Interim updates made in ETKA can
cause a listed part number to become unavailable. In this case, the new part number specified in ETKA should be
used.
Required Tools
Socket - 27mm
-T40218(or equivalent)
Special Tool # 582277
(or equivalent)
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 8 of 22
Repair Instruction
Section A - Check for Previous Repair
•
Enter the VIN in Elsa and proceed to the
“Campaign/Action” screen.
TIP
On the date of repair, print this screen and keep a copy
with the repair order.
•
Confirm the Campaign/Action is open .
If the status is closed, no further work is required.
•
Note the Applicable Criteria ID  for use
in determining the correct work to be done and
corresponding parts associated.
•
All Safety Recalls MUST be completed before
starting this Campaign.
Proceed to Section B
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 9 of 22
Section B – Reducing Agent Injector Work Procedure (Criteria 01)
•
Remove clamp .
•
Leave injector electrical connector plugged in
and remove injector from the SCR catalyst.
•
Inspect the injector part number:
o
o
If part number 4H0.131.113.A is
present, no further work is required.

Vehicles with only Criteria
01 open, reinstall the
injector with a new gasket
and clamp, Proceed to
Section E.

Vehicles with Criteria 02
open, Proceed to Section D.
If any other part number is present or
if the part number is unknown:

Proceed to the next step
and replace the injector.
Replace Reducing Agent Injector:
NOTE
•
Lay a cloth below to catch any escaping
AdBlue reducing agent.
•
Make certain the electrical connector is
installed into the new Reducing Agent
Injector
-N474- before disconnecting the AdBlue
reducing agent feed hose. This will reduce
the possibility of contaminating the
electrical connection with AdBlue.
•
Disconnect the connector <2> from the existing
Reducing Agent Injector -N474- <4>.
•
Connect the connector <2> to the new
Reducing Agent Injector -N474- <4> and set it
aside.
•
Make certain the electrical connector is
installed into the new Reducing Agent Injector
before disconnecting the AdBlue reducing
agent feed hose.
This will reduce the
possibility of contaminating the electrical
connection with AdBlue.
•
Remove the AdBlue reducing agent hose <1>
by pressing the release clasps  and
remove the reducing agent hose <1>.
•
Connect the AdBlue reducing agent hose <1>
to the new Reducing Agent Injector -N474<4>.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 10 of 22
Install Reducing Agent Injector:
•
Install Reducing Agent Injector -N474- into the
SCR Catalyst pipe ensuring that the tabs in the
Injector  fit into the corresponding
mounts in the SCR catalytic converter.
TIP
A new gasket comes pre-installed on a new injector.
•
Install a new retaining clamp  and tighten
the bolt to 5 Nm.
Part Number
Description
3C0.253.725
Retaining Clamp
If Criteria 02 is open on the vehicle:
Proceed to Section C
If Criteria 02 is NOT open on the Vehicle:
All Work Complete, Proceed to Section D
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 11 of 22
Section C – SCR Catalyst Work Procedure (Criteria 02)
•
Inspect the SCR catalyst part number:
o
2012 MY: If part number 4L0.254.400.AX
is present, no further work is required.
o
2010 MY: If part number 7L8.254.400.RX
is present, no further work is required.

o
Proceed to Section E.
If any other part number is present or if
the part number is unknown:

Proceed to the next step and
replace the SCR catalyst.
Figure 
Remove the NOx #2 sensor
<1> from the catalyst pipe.
Figure 
Cover the NOx #2 Sensor
with a plastic bag (or
equivalent) and secure it
out of the way with a tie
strap
(or
equivalent)
attached through either one
of two holes in the rear
driveshaft
mid-bearing
bracket .
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 12 of 22
•
Loosen the screw  and remove the clamp from
the Reducing Agent Injector -N474-.
•
Leave the electrical connector and the Reducing
Agent Injector AdBlue feed line connected at this
This will reduce the possibility of
time.
contaminating the electrical connection with
AdBlue.
•
Secure the Reducing Agent Injector out of the way
with a tie strap (or equivalent).
•
Loosen the two nuts on the Dual Clamp 
so the clamp can slide back and forth on the
exhaust pipe.
•
Leave the clamp in the installed position at this
time. This will assist in holding the SCR Catalyst
in place while removing the brackets in the next
step.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 13 of 22
•
With the assistance of a second technician,
remove the three nuts  from the exhaust studs
securing the SCR Catalyst to the Diesel
Particulate Filter (DPF).
•
Remove the bolts from SCR Catalyst brackets at
locations  with assistance from second
technician to support the SCR Catalyst while the
brackets are removed.
•
Slide the Dual Clamp  towards the rear of the
vehicle, and with the assistance of a second
technician, remove the SCR Catalyst from the
vehicle.
•
Remove the Dual Clamp  from the exhaust
pipe and discard.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 14 of 22
NOTE
STOP!
Due to corrosion, one or more of the mounting studs
may break  when removing the SCR catalytic
converter from the Diesel Particulate Filter (DPF) flange.
DO NOT use a hammer and punch, heat, air hammer,
or other method to remove the studs from the DPF.
Consequential damage to Exhaust Gas Temperature
Sensors, Diesel Particulate Filter, AdBlue Injector Feed
Line, or any other ancillary components WILL NOT BE
COVERED under this action due to damage from heat,
impact, or vibration.
Follow the steps below if one or more studs are broken
or damaged.
Special Tool # 582277
•
If stud replacement is necessary use Special Tool
# 582277, or a comercially available clevis pin
press such as an OTC 5057 or equivalent to press
any broken or damaged studs out of the DPF
flange.
•
It is advised if one stud breaks that all three studs
are pressed out and replaced with the bolts/nuts
included in the parts kit.
•
Install the replacement bolts and corresponding
nuts into the rear DPF flange.
Part Number
Description
Quantity
N 010.247.13
Replacement Exhaust
Bolt
3
N 911.308.02
Shouldered Hex Nut
3
OTC 5057
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 15 of 22
NOTE
Coat the threads on the nuts and exhaust studs/bolts
 with hot bolt paste prior to installation. Refer to the
Parts Catalog.
•
Install the new exhaust Dual Clamp onto the
exhaust pipe at location  and slide the clamp
to the rear of the vehicle, but do not tighten.
•
With the assistance of a second technician, install
the new SCR Catalyst with a new gasket between
the SCR Catalyst and DPF . Fit the SCR
Catalyst onto the DPF flange studs/bolts and
install new nuts and tighten to 23 Nm.
•
Slide the Dual Clamp into the installed position on
the SCR Catalyst, but do not tighten. This will
assist in holding the SCR Catalyst in place while
the exhaust system is properly tensioned.
•
Install the bolts for the SCR Catalyst brackets  and tighten by hand.
Part Number
Description
Qty.
7L8.254.400.RX
SCR Catalyst (2010 MY)
1
4L0.254.400.AX
SCR Catalyst (2012 MY)
1
1K0.253.141.J
Dual Clamp
1
7L5.253.115.C
Gasket
1
N 911.308.02
Shouldered Hex Nut
3
N 010.247.13
Replacement Stud/Bolt
(if necessary)
3
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 16 of 22
•
Tighten the Dual Clamp  until there is a slight
dragging resistance on both the SCR Catalyst
pipe  and the rear resonator/muffler
pipe , but do not tighten so much that
the pipes cannot slide in and out of the Dual
Clamp .
•
Pretension the rear resonator/muffler hanging
straps by pulling the rear resonator/muffler pipe
towards the front of the vehicle  and
pulling the SCR Catalyst pipe towards the rear of
the vehicle .
In order to reduce harmonic
vibration,
the
rear
muffler/resonator
straps
 require 12 mm of
forward tension, as shown
Pull
in the sub-photo.
forward
on
the
rear
muffler/resonator pipe and
insert the pipe deeper into
the Dual Clamp until this
dimension is achieved.
 = Rear Resonator Hanging Straps
•
Once the desired
dimension of  =
12 mm is achieved,
tighten the Dual
Clamp nuts to 23
Nm.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 17 of 22
Figure 
Front
Muffler/Resonator
hanging strap:  = 4 mm
If equipped, loosen the
bolts
at
the
forward
resonator pipe hanging
strap  and adjust the
bracket until  = 4 mm of
forward tension.
•
Figures 
Tighten the two
hanging strap bolts
to 23 Nm.
Left and Right SCR hanging
straps:  = 0.00 mm,
install without tension.
If necessary, loosen the
bolts at the left and right
SCR Cat hanging straps  and adjust the
brackets until  = 0.00
mm. The SCR Catalyst
hanging straps are installed
tension free.
•
•
Tighten the two
hanging
strap
bracket bolts 
to 60 Nm.
•
Tighten the two
hanging
strap
bracket bolts 
to 23 Nm.
If necessary, align the tail pipes by first loosening
the screw-type clamp  on the tailpipes.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 18 of 22
•
Align tail pipe to the rear muffler and center the tail
pipes into the bumper cover.
•
Check distance of left and right tail pipes to
bumper.
o
•
Dimension -x- left = dimension -x- right
Once the tail pipe is properly aligned to the bumper
cover, tighten the screw-type clamps  to 60
Nm.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 19 of 22
If reinstalling original Reducing Agent Injector:
•
Install new gasket into the Reducing Agent
Injector -N474-.
•
Install the Reducing Agent Injector -N474- into the
SCR Catalyst pipe ensuring that the tabs on the
Injector  fit into the corresponding
mounts in the SCR catalytic converter.
•
Install a new retaining clamp  and tighten the
bolt to 5 Nm.
Part Number
Description
Quantity
3C0.253.725
Retaining Clamp
1
3C0.253.115.A
Reducing Agent
Injector Gasket (only if
required)
1
All Work Complete.
Proceed to Section D.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 20 of 22
Section D – Campaign Completion Stamp
•
Once the campaign has been completed,
the technician should stamp the repair
order.
•
Stamps are available for ordering through
the Compliance Label Ordering Portal.
•
Proceed to Section E
Item#: AUD4927ENG
-OR-
Item # AUD4927FRE
Section E – Campaign Completion Label
Install Campaign Completion Label
•
Fill out and affix Campaign Completion
Label, part number CAMP 010 000, next to
the vehicle emission control information
label.
TIP
Ensure Campaign Completion Label does not cover
any existing label(s).
Proceed to Section F
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 21 of 22
Section F - Parts Return/Disposal
Parts Return/Disposal
SCR Catalyst:
•
The SCR Catalyst must be tagged with a blue zip
tie  and returned in order to be
considered for core charge reimbursement.
All other parts:
•
Properly store (retain), destroy or dispose of
removed parts in accordance with all state and local
requirements, unless otherwise indicated and/or
requested through the Warranty Parts Portal
(WPP).
All Work Complete
Proceed to Section G (California only).
Section G – California Only Requirements
CALIFORNIA ONLY Requirements for Emissions Campaigns Having Customer Notification
The California Air Resources Board and the Department of Motor Vehicles (DMV) require emissions-related
campaigns to be completed prior to vehicle registration renewal. When campaign work is done you must provide
the owner with a signed “Vehicle Emission Recall – Proof of Correction” certificate (RC EMIS_CAL VW).
Certificates can be ordered at no cost online via the Compliance Label Ordering portal at www.accessaudi.com.
TIP
Ensure owners are aware of the importance of retaining the completed certificate for their records. It should
be mailed to the California DMV only upon request.
The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
December 2019
26M9 Page 22 of 22