No. 122-20

Service
Technical Information
122/20 ENU
4636
4
Complaint - Brake Noises: Classifying Features and Procedure (122/20)
Model Line:
Macan (95B)
Panamera (971)
718 Boxster / 718 Cayman (982)
911 Carrera (992)
Cayenne (9YA / 9YB)
Taycan (Y1A)
Model Year:
As of 2017
Concerns:
Brake pads at front and rear
Cause:
Customers complain about brake noises from around the front or rear axle.
Action required: Classify the brake noise, document it and observe the relevant procedure.
Talking to customers
Work Procedure: 1
When talking to customers, ask about the operating conditions in which the noise occurs:
•
•
•
•
•
Are the brakes warm or cold?
Weather conditions dry or wet?
Outside temperature warm or cold?
Slight or hard braking?
Slow, normal or sporty driving?
Information
•
A groaning noise and creaking can be heard when the brakes are pressed slightly when the vehicle
is nearly at a standstill, e.g. when manoeuvring or parking. These noises do not occur when driving
normally.
•
The groaning/creaking increases when driving on gradients, in wet conditions and in Sport+ drive
mode as well as at low temperatures.
•
Squealing can occur in all driving situations.
•
Other brake noises may be scraping or clicking.
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Service
Technical Information
ENU 122/20
4636
Braking noise
Groaning / creaking
Conditions of occurrence
•
•
•
A groaning noise and creaking can be heard when the brakes are
pressed lightly when the vehicle is nearly at a standstill, e.g. when
manoeuvring or parking.
These noises usually do not occur during normal driving.
Slopes, wetness and Sport+ driving mode as well as low temperatures increase a groaning / creaking.
Squealing
•
Slopes, wetness and Sport+ driving mode as well as low temperatures increase a squealing.
Scraping / chipping
•
Usually occurs on PCCB brake systems when the brake is actuated
shortly in front of the vehicle.
Slight actuation of the brake can promote scraping / chipping.
•
For better classification of the noises, see 3D information.
2
Classification of customer description and deriving possible action:
The brake noise occurs shortly before the vehicle comes to a standstill or while creeping at slow
speeds,usually when the brakes are cold (groaning or creaking):
Continue with  Technical Information 'Cold brakes'.
The brake noise is generally produced shortly before a standstill when the brake is warm and the
vehicle has a PCCB brake system (scraping or chipping):
Continue with  Technical Information 'brake noise (scraping/chipping)'.
The brake noise occurs in every driving situation (squealing):
Continue with  Technical Information 'Warm brakes'.
The brake noise cannot be assigned to any of the noises specified above:
Continue with  Technical Information 'Other brake noises'.
3D Information: For better classification of the noises, use the sound file/video under the following link.
4600IN Brake - Checking and complementing brake mechanism
Brake noise (groaning/creaking)
Information
The noise complaint must be documented as follows.
Recreate the driving situation in which the noise occurs and repeat this several times if possible. Choose
the quietest area possible to do this.
•
Mar 9, 2023
Page 2 of 12
At speeds < 10 km/h (6 mph) - Record the noise from outside and capture the brake that is causing
the noise in the picture
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Service
Technical Information
•
122/20 ENU
4636
4
At speeds > 10 km/h (6 mph) - Record the noise from inside and capture the speedometer in the
picture
File name of the video: Quality line ID_Vehicle_Noise_DDMMYYYY
e.g.: 2200123456_911 Carrera_Groaning_26082020
Work
Procedure:
Information
A groaning noise or creaking usually occurs when the brakes are cold. Squealing can occur in all driving
situations.
First classify the noise using the sound file. You will find this under "4636 - Sound file for TI (122/20)" in
the information medium TI - Technical Information, Main group 4 - Chassis.
If the noise cannot be classified as groaning or creaking, continue with  Technical Information 'Warm
brakes'.
Groaning
Creaking
Create vehicle analysis log (VAL), reproduce
the noise and record it on video.
Create vehicle analysis log (VAL), reproduce
the noise and record it on video.
Can the groaning noise be confirmed and is this
the noise the customer complained about?
Can the creaking noise be confirmed and is this
the noise the customer complained about?
Yes
No
See section "Procedure
with confirmed noise".
Continue as required
for the detected noise,
using the sound file
to classify it.
See 3D Information.
Yes
No
See section "Procedure
with confirmed noise".
Continue as required
for the detected noise,
using the sound file
to classify it.
See 3D Information.
Procedure with confirmed noise
•
•
•
•
Make meaningful documentation of the noise with sound and video material in PQIS.
Check whether a suitable TI / SY is available for the reported noise in PCSS and work through it.
If no remedial action is available and there is no technical defect in the brake system, explain the
technical situation to customers with the help of the Driver's Manual of the vehicle (section: Brakes
– Footbrake – Brake pads and brake discs).
If necessary, contact Technical Support in order to agree on how to proceed.
3D Information: For better classification of the noises, use the sound file/video under the following link.
4600IN Brake - Checking and complementing brake mechanism
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Technical Information
ENU 122/20
4636
Brake noise (squealing)
Information
The noise complaint must be documented as follows.
Recreate the driving situation in which the noise occurs and repeat this several times if possible. Choose
the quietest area possible to do this.
•
At speeds < 10 km/h (6 mph) - Record the noise from outside and capture the brake that is causing
the noise in the picture
•
At speeds > 10 km/h (6 mph) - Record the noise from inside and capture the speedometer in the
picture
File name of the video: Quality line ID_Vehicle_Noise_DDMMYYYY
e.g.: 2200123456_911 Carrera_Squealing_26082020
Work
Procedure:
Information
First classify the noise using the sound file. You will find this under "4636 - Sound file for TI (122/20)" in
the information medium TI - Technical Information, Main group 4 - Chassis.
If the noise is not a squealing noise, continue with  Technical Information 'Cold brakes'.
Squealing
Create vehicle analysis log (VAL), reproduce the noise and record it on video.
Can the squealing noise be confirmed and is this the noise the customer complained about?
Yes
No
Check wear condition of the brake pads, see
 Workshop Manual '463602 Checking
front disc brake pads'
 Workshop Manual '463402 Checking
front PCCB brake pads'
 Workshop Manual '463802 Checking
rear disc brake pads'
 Workshop Manual '463502 Checking
rear PCCB brake pads'.
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•
The brake pads are > 50% worn or the
brake pad or disc shows signs of damage,
continue with Step 1.
•
If the wear condition is unobtrusive:
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Continue as required for the detected noise,
using the sound file to classify it.
See 3D Information.
Service
Technical Information
•
•
•
•
1
122/20 ENU
4636
4
Make meaningful documentation of the
noise with sound and video material in PQIS.
Reference Group 4 ATI 1801 Brake Squeal
for additional measures to address the
squealing noises.
If no remedial action is available and there
is no technical defect in the brake system,
explain the technical situation to customers
with the help of the Driver's Manual of the
vehicle (section: Brakes – Footbrake –
Brake pads and brake discs).
If necessary, contact Technical Support in
order to agree on how to proceed.
Replace brake pads, see
 Workshop Manual '463656 Replacing front brake disc pads'
 Workshop Manual '463456 Replacing front PCCB brake pads'
 Workshop Manual '463856 Replacing rear disc brake pads'
 Workshop Manual '463556 Replacing rear PCCB brake pads'.
2
Check brake discs and replace them if necessary, see
 Workshop Manual '465002 Checking front brake discs (wear assessment)'
 Workshop Manual '465102 Checking front PCCB brake discs (wear assessment)'
 Workshop Manual '465302 Checking rear brake discs (wear assessment)'
 Workshop Manual '465402 PCCB - Checking rear brake discs (wear assessment)'
and
 Workshop Manual '465019 Removing and installing front brake disc'
 Workshop Manual '465119 Removing and installing front PCCB brake disc'
 Workshop Manual '465319 Removing and installing rear brake disc'
 Workshop Manual '465419 Remove and install rear PCCB brake disc'.
3D Information: For better classification of the noises, use the sound file/video under the following link.
4600IN Brake - Checking and complementing brake mechanism
Brake noise (scraping/chipping)
Information
The brake noises covered in this section (scraping/chipping) usually occur only on PCCB brake systems.
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Service
Technical Information
ENU 122/20
4636
Information
The noise complaint must be documented as follows:
Recreate the driving situation in which the noise occurs and repeat this several times if possible. Ensure
that the environment is as quiet as possible to do this.
•
At speeds < 10 km/h (6 mph) - Record the noise from outside and capture the brake that is causing
the noise in the picture
•
At speeds > 10 km/h (6 mph) - Record the noise from inside and capture the speedometer in the
picture
File name of the video: Process line ID_Vehicle_Noise_DDMMYYYY
e.g.: 2200123456_911 Carrera_Scraping_20200826
Equipment:
Work
Procedure:
PCCB front brake disc
•
Macan (95B) - M-no. 1LY
•
•
•
•
•
911 (992) - M-no. 1LQ, 1LX, 1LZ
Panamera (971) - M-no. 1LQ, 1LX
718 Boxster/ 718 Cayman (982) - M-no. 450
Taycan (Y1A / Y1B / Y1C) - M-no. 1LQ, 1LX
Cayenne (9YA / 9YB) - M-no. 1LX, 1ZV, 1ZW
Information
Scraping or swapping generally occurs in warm brakes, cold and wet weather conditions in combination
with "glazed" brake pad friction surfaces.
Glazing of the brake pad friction surfaces can be caused by a so-called "reduced load" on the brake
system.
A "reduced load" occurs when the brake system is generally operated rather rarely and also only slightly.
This behavior can be promoted by recuperation on BEV1 and PHEV2 vehicles.
If the noise complained about cannot be assigned to scraping or chipping, continue with  Technical
Information '465419 Further braking noises'.
1 Battery Electric Vehicle (BEV)
2 Plug-in Hybrid Electric Vehicle (PHEV)
Scraping/chipping
Create vehicle analysis log (VAL), reproduce the noise and record it on video.
Can the scraping/chipping be confirmed and is this the noise the customer complained about?
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Service
Technical Information
122/20 ENU
4636
4
Yes
No
See section "Procedure with confirmed noise".
Continue as required for the detected noise,
using the sound file to classify it.
See 3D Information.
Procedure with confirmed noise
•
•
•
•
Make meaningful documentation of the noise with sound and video material in PQIS.
Check whether a suitable TI / SY is available for the reported noise in PCSS and work through it.
If no remedial action is available and there is no technical defect in the brake system, explain the
technical situation to customers with the help of the Driver's Manual of the vehicle (section: Brakes
– Footbrake – Brake pads and brake discs).
If necessary, contact Technical Support in order to agree on how to proceed.
1
Replace brake pads on the front axle.
For work procedure, see:
 Workshop Manual '463456 Replacing front PCCB brake pads'
2
In a personal discussion, make the customer aware of the issue of "reduced load" and explain the
special features of a ceramic brake system (PCCB).
Information
Please note that for the fault type "Brake pad rigging", invoicing is not possible under the New Vehicle or
Porsche Approved Warranty.
3D Information: For better classification of the noises, use the sound file/video under the following link.
4600IN Brake - Checking and complementing brake mechanism
Other brake noises
Work Procedure: 1
2
Create vehicle analysis log (VAL), reproduce the noise and record it on video.
Check wear condition of the brakes, see
 Workshop Manual '463602 Checking front disc brake pads'
 Workshop Manual '463402 Checking front PCCB brake pads'
 Workshop Manual '463802 Checking rear disc brake pads'
 Workshop Manual '463502 Checking rear PCCB brake pads'.
3
Check brake system for damage.
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Service
Technical Information
ENU 122/20
4636
Information
If there are no signs of damage to the brake system, the brakes are not particularly worn and the brake
noise cannot be assigned to any of the specified noises:
Document the noise using the relevant sound and video material in PQIS and contact Technical Support to
agree on how to proceed.
Information
The noise complaint must be documented as follows.
Recreate the driving situation in which the noise occurs and repeat this several times if possible. Choose
the quietest area possible to do this.
•
At speeds < 10 km/h (6 mph) - Record the noise from outside and capture the brake that is causing
the noise in the picture
•
At speeds > 10 km/h (6 mph) - Record the noise from inside and capture the speedometer in the
picture
File name of the video: Quality line ID_Vehicle_Noise_DDMMYYYY
e.g.: 2200123456_911 Carrera_Mooing_26082020
Invoicing
Invoicing:
Depending on the individually required measures to be carried out for documentation and invoicing in
the event of a warranty claim, specify the respectively applicable work items from those given below and
PQIS code and part no. in the warranty claim.
I-no.
LO
Labor operation (Macan)
46360250
Checking 4 front disc brake pads
46365600
Replacing 4 front disc brake pads
46380250
Checking 4 rear disc brake pads
46385600
Replacing 4 rear disc brake pads
46340250
Checking 4 front PCCB brake pads
46345600
Replacing 4 front PCCB brake pads
46350250
Checking 4 rear PCCB brake pads
46355600
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
46502000
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
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Service
Technical Information
122/20 ENU
46510250
Checking 2 front PCCB brake discs
46512050
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542050
Replacing 2 rear PCCB brake discs
LO
Labor operation (Panamera)
46360200
Checking 4 front disc brake pads
46365600
Replacing 4 front disc brake pads
46380200
Checking 4 rear disc brake pads
46385600
Replacing 4 rear disc brake pads
46340200
Checking 4 front PCCB brake pads
46345600
Replacing 4 front PCCB brake pads
46385600
Checking 4 rear PCCB brake pads
46385600
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
46502000
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
46510250
Checking 2 front PCCB brake discs
46512000
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542000
Replacing 2 rear PCCB brake discs
LO
Labor operation (Boxster / Cayman)
46360200
Checking 4 front disc brake pads
46365650
Replacing 4 front disc brake pads
46380200
Checking 4 rear disc brake pads
46385650
Replacing 4 rear disc brake pads
46340200
Checking 4 front PCCB brake pads
46345650
Replacing 4 front PCCB brake pads
46350200
Checking 4 rear PCCB brake pads
46355650
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
4636
4
I-no.
I-no.
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Service
4636
Technical Information
ENU 122/20
46502050
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
46510250
Checking 2 front PCCB brake discs
46512050
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542050
Replacing 2 rear PCCB brake discs
LO
Labor operation (911 Carrera)
46360200
Checking 4 front disc brake pads
46365650
Replacing 4 front disc brake pads
46380200
Checking 4 rear disc brake pads
46385650
Replacing 4 rear disc brake pads
46340200
Checking 4 front PCCB brake pads
46345650
Replacing 4 front PCCB brake pads
46350200
Checking 4 rear PCCB brake pads
46355650
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
46502050
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
46510250
Checking 2 front PCCB brake discs
46512050
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542050
Replacing 2 rear PCCB brake discs
LO
Labor operation (Cayenne)
46360250
Checking 4 front disc brake pads
46365600
Replacing 4 front disc brake pads
46380250
Checking 4 rear disc brake pads
46385600
Replacing 4 rear disc brake pads
46340250
Checking 4 front PCCB brake pads
46345600
Replacing 4 front PCCB brake pads
Mar 9, 2023
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I-no.
I-no.
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Service
Technical Information
122/20 ENU
46350250
Checking 4 rear PCCB brake pads
46355600
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
46502050
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
46510250
Checking 2 front PCCB brake discs
46512050
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542050
Replacing 2 rear PCCB brake discs
LO
Labor operation (Taycan)
46360250
Checking 4 front disc brake pads
46365600
Replacing 4 front disc brake pads
46380250
Checking 4 rear disc brake pads
46385600
Replacing 4 rear disc brake pads
46340250
Checking 4 front PCCB brake pads
46345600
Replacing 4 front PCCB brake pads
46350250
Checking 4 rear PCCB brake pads
46355600
Replacing 4 rear PCCB brake pads
46500250
Checking 2 front brake discs
46502050
Replacing 2 front brake discs
46530250
Checking 2 rear brake discs
46532050
Replacing 2 rear brake discs
46510250
Checking 2 front PCCB brake discs
46512050
Replacing 2 front PCCB brake discs
46540250
Checking 2 rear PCCB brake discs
46542050
Replacing 2 rear PCCB brake discs
4636
4
I-no.
Choose PQIS coding based on the fault cause defined above:
Fault location (FES5)
46360
Front disc brake pad
46320
PSCB brake pad front
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Service
4636
Damage category (SA4)
References:
Technical Information
ENU 122/20
46340
PCCB brake pad front
46380
Disc brake pad rear
46330
PSCB brake pad rear
46350
PCCB brake pad rear
2019
Squealing
2017
Grinding, Creaking
2053
Groaning
 Workshop Manual '463402 Checking front PCCB brake pads'
 Workshop Manual '463456 Replacing front PCCB brake pads'
 Workshop Manual '463502 Checking rear PCCB brake pads'
 Workshop Manual '463556 Replacing rear PCCB brake pads'
 Workshop Manual '463602 Checking front disc brake pads'
 Workshop Manual '463656 Replacing front brake disc pads'
 Workshop Manual '463802 Checking rear disc brake pads'
 Workshop Manual '463856 Replacing rear disc brake pads'
 Workshop Manual '465002 Checking front brake discs (wear assessment)'
 Workshop Manual '465019 Removing and installing front brake disc'
 Workshop Manual '465102 Checking front PCCB brake discs (wear assessment)'
 Workshop Manual '465119 Removing and installing front PCCB brake disc'
 Workshop Manual '465302 Checking rear brake discs (wear assessment)'
 Workshop Manual '465319 Removing and installing rear brake disc'
 Workshop Manual '465402 PCCB - Checking rear brake discs (wear assessment)'
 Workshop Manual '465419 Removing and installing rear PCCB brake disc'
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2023 Porsche Cars North America, Inc.
Mar 9, 2023
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