07-007-19-3638

Technical
Service Bulletin
Mazda North American Operations
Irvine, CA 92618-2922
Subject:
POOR HEATER PERFORMANCE AND/OR DTC P011A:00 STORED
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
BULLETIN NOTES
This bulletin supersedes the previously issued bulletin(s) listed below: The changes are noted in Red.
Previous TSBs: Date(s) Issued:
07-007/17
09/08/17
APPLICABLE MODEL(S)/VINS
2014-2018 Mazda3
2019 Mazda3 (Japan built) vehicles with VINs lower than JM1 BP ****** 131366 (produced before Apr. 1,
2019)
2019 Mazda3 (Mexico built) vehicles
2014-2019 (US spec) / 2020 (Mexico spec) Mazda6 vehicles with VINs lower than JM1 GL ****** 504134
(produced before Apr. 1, 2019)
2016-2019 CX-3 vehicles with VINs lower than JM1 DK ****** 441849 (produced before Apr. 1, 2019)
2013-2019 CX-5 vehicles with VINs lower than JM3 KF ****** 605884 (produced before Apr. 1, 2019)
2016-2019 CX-9 vehicles with VINs lower than JM3 TC ****** 323662 (produced before Apr. 1, 2019)
2016-2019 MX-5 vehicles with VINs lower than JM1 ND ****** 308245 (produced before Apr. 1, 2019)
DESCRIPTION
Some customers may complain about poor heater performance even after the engine reaches normal
operating temperature. This may be caused by a plugged heater core.
For 2014-2016 Mazda6 and 2013-2016 (US spec) / 2017 (Mexico spec) CX-5, the CHECK ENGINE light
may turn on with DTC P011A:00 (ECT sensor No.1/No.2 performance problem) stored at the same time.
NOTE: Refer to TSB 01-015/15 if the customer is using a block heater at temperatures below freezing.
To solve this concern, two mass production changes have been implemented.
a) The concentration of the coolant has been increased so that the amount of the contained anti-rust
additive is higher.
b) The composition of the coolant has been changed (the ratio of the anti-rust additive has increased).
SUBJECT VIN RANGE do not have mass production change implemented.
Page 1 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
VIN Range / Production Date range
a) + b)
Spec.
b)
Mazda3 (BM)
2014-2016
100001 - 355940
JM1 BM**** **
(Japan Built) Jun. 11, 2013 - Jun. 23, 2016
100001 - 330142
3MZ BM**** **
(Mexico Built) Dec. 4, 2013 - Sep. 3, 2016
-
Mazda3 (BN)
2017-2018
100001 - 168290
168291 - 199538
JM1 BN**** **
(Japan Built) Jun. 27, 2016 - Sep. 1, 2017 Sep. 4, 2017- Oct. 31, 2018
100001 - 173224
173224 - 277187
3MZ BN**** **
(Mexico Built) Sep. 1, 2016 - Sep. 4, 2017 Sep. 5, 2017 - Dec. 20, 2018
Mazda3 (BP)
2019
-
100001 - 131366
Sep. 25, 2018 - Apr. 1, 2019
100001 - 999999
Jan. 15, 2019 -
JM1 GJ**** **
100001 - 488592
Oct. 25, 2012 - Jun. 30, 2016
-
JM1 GL**** **
100001 - 145921
145922 - 504134
Jun. 13, 2016 - Sep. 1, 2017 Sep. 4,2017 - Apr. 1, 2019
JM1 DK**** **
100001 - 312504
312505 - 441849
Mar. 9, 2015 - Sep. 1, 2017 Sep. 5, 2017 - Apr. 1, 2019
JM1 BP**** **
(Japan Built)
3MZ BP**** **
(Mexico Built)
Mazda6 (GJ)
2014-2016
Mazda6 (GL)
US 2017-2019
Mexico 2017-2020
CX-3 (DK)
2016 - 2019
CX-5 (KE)
US 2013-2016
Mexico 2013-2017
JM3 KE*** **
100001 - 921726
Dec. 15, 2011 - Dec. 21, 2016
-
JM3 KF**** **
100001 - 212222
212223 - 605884
Dec. 27, 2016 - Sep. 1, 2017 Sep. 4,2017 - Apr. 1, 2019
JM3 TC**** **
100001 - 206006
206007 - 323662
Feb. 11, 2016 - Sep. 1, 2017 Sep. 4, 2017 - Apr. 1, 2019
CX-5 (KF)
US 2017-2019
Mexico 2018-2019
CX-9 (TC)
2016 - 2019
MX-5 (ND)
JM1 ND**** **
100001 - 125180
125181 - 125278
Page 2 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
2016 - 2017
Convertible Top
Last Issued: 11/04/2019
Apr. 20, 2015 - Aug. 25, 2017 Sep. 4, 2017 - Sep. 30, 2017
100001 - 109269
109270 - 109865
2017
JM1 ND**** **
Retractable Fastback
Oct. 4, 2016 - Sep. 1, 2017 Sep. 4, 2017 - Sep. 30, 2017
200001 - 308245
2018-2019
JM1 ND**** **
Oct. 3, 2017 - Apr. 1,2019
Customers having this concern should have their vehicle repaired using the following repair procedure.
DIAGNOSIS PROCEDURE
Perform the following diagnosis procedure to determine if the concern is caused by a plugged heater core.
NOTE: DTC P011A:00 (ECT2 sensor on the heater hose) is available only for 2013-2016 (US spec) / 2017
(Mexico spec) CX-5 and 2014-2016 Mazda6.
STEP INSPECTION
1
RESULTS
Is there any engine related DTC other Yes
than P011A:00 stored?
(See above NOTE)
No
ACTION
Perform diagnosis for the DTC according to
the instructions on MGSS.
Go to next step.
2
Is there any air bubbles observed in
the engine cooling system?
Yes
Go to next step.
No
Go to step 4.
Yes
Possible cylinder head gasket leakage.
3
Perform engine coolant leakage
inspection according to the
instructions on MGSS.
Are air bubbles still observed while
the engine is running?
No
Go to next step.
4
For some CX-5 and Mazda6 only:
Is DTC P011A:00 stored?
(See NOTE A about P011A:00)
Yes
Check ECT sensors for correct output
performance
No
Go to next step.
5
Check ECT sensors for correct output Normal
performance.
Is it normal or abnormal?
Abnormal
(See NOTE B for the Check Procedure)
6
Inspect heater hose IN and OUT for
temperature difference.
Is there no difference or a large
difference?
(See NOTE C for Inspection Procedure)
Go to next step.
Possible problem with ECT sensor related
system.
No
difference
Possible other causes. Contact Hotline.
Large
difference
Heater core is plugged. Replace heater core
and replace engine coolant twice. Go to
Repair Procedure.
Page 3 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
NOTE A: DTC P011A:00 (ECT sensor No.1/No.2 performance problem) is for 2013-2016 (US spec) / 2017
(Mexico spec) CX-5 and 2014-2016 Mazda6 only.
The purpose of having two ECT sensors is to mutually monitor their performances. If two temperature
values detected by the sensors are different beyond the specified value, the DTC
P011A:00 is set.
Location of ECT sensors
(Mazda6 is shown)
NOTE B: Check ECT sensors for output performance
Perform the following inspection during a cold soak (vehicle sitting overnight without starting).
Read the temperature values of the following PIDs in M-MDS Datalogger.



ECT: Engine Coolant Temperature.
ECT2_V: ECT sensor No.2 voltage.
AMB_TEMP: Ambient Temperature.
Page 4 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
Use below table to convert ECT2_V (voltage) into the temperature.
Output (V) 4.84 4.79 4.72 4.64 4.55 4.43 4.30 4.14 3.96 3.77 3.56
Temp (°C) -40 -35 -30 -25 -20 -15 -10
-5
0
5
10
Temp (°F) -40 -31 -22 -13
23
32
41
50
-4
5
14
Output (V) 3.33 3.10 2.86 2.63 2.39 2.17 1.95 1.75 1.57 1.40 1.25
Temp (°C) 15
20
25
30
35
40
45
50
55
60
65
Temp (°F) 59
68
77
86
95 104 113 122 131 140 149
Output (V) 1.11 0.99 0.87 0.78 0.69 0.61 0.55 0.48 0.43 0.38 0.34
Temp (°C) 70
75
80
85
90
95 100 105 110 115 120
Temp (°F) 158 167 176 185 194 203 212 221 230 239 248
ECT1 and ECT2 sensor voltage values must match the AMB_TEMP values (during a cold soak).
If the detected values are not equivalent to the ambient temperature and/or any of the following DTCs is
stored, failure of the ECT sensor related system is possible.
DTC No.
Condition
P0116:00 ECT sensor No.1 circuit range/performance problem
P0117:00 ECT sensor No.1 circuit low input
P0118:00 ECT sensor No.1 circuit high input
P2183:00 ECT sensor No.2 circuit range/performance problem
P2184:00 ECT sensor No.2 circuit low input
P2185:00 ECT sensor No.2 circuit high input
Page 5 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
NOTE C: Inspect heater hose IN and OUT for temperature difference.
Using a thermal temperature gun or thermocouple, measure the heater hose IN and heater hose OUT
temperature. If there is an obvious difference in temperature between both hoses, the heater core may be
plugged.
NOTE: When doing this inspection, turn the HVAC blower fan OFF. If ON, the heater core radiates heat, so
the temperature difference between IN and OUT hoses will generate heat even if the heater core is not
plugged.
Heater Hose IN (B): Upper side of heater core
Heater Hose OUT (C): Lower side of heater core
With Water Temp Sensor
Without Water Temp Sensor
Mazda
6 is
shown
Page 6 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
REPAIR PROCEDURE
If the heater core was determined to be plugged by the diagnosis procedure, replace the heater core with a
new one and replace the contaminated engine coolant twice.
NOTE: Remove the old contaminated coolant by draining the coolant twice and refilling with new coolant.
WARNING:



Never remove the cooling system cap or loosen the radiator drain plug while the engine is running,
or when the engine and radiator are hot. Scalding engine coolant and steam may shoot out and
cause serious injury. It may also damage the engine and cooling system.
Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap.
Wrap a thick cloth around it and slowly turn it counterclockwise to the first stop, then step back
while the pressure escapes.
When you are sure all the pressure is gone, press down on the cap using the cloth, turn it, and then
remove it.
1. Replace the heater core by referring to the instructions on MGSS.









2014-2018 Mazda3 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C UNIT
DISASSEMBLY/ASSEMBLY)
2019 Mazda3 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C UNIT
DISASSEMBLY/ASSEMBLY)
2014-2017 (US spec)/2018 (Mexico spec) Mazda6 - (A/C UNIT REMOVAL/INSTALLATION) and
(A/C UNIT DISASSEMBLY/ASSEMBLY)
2018-2019 (US spec)/2019 (Mexico spec) Mazda6 - (A/C UNIT REMOVAL/INSTALLATION) and
(A/C UNIT DISASSEMBLY/ASSEMBLY)
2013-2016 (US spec)/2017 (Mexico spec) CX-5 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C
UNIT DISASSEMBLY/ASSEMBLY)
2017 (US spec)/2018 (Mexico spec)-2019 CX-5 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C
UNIT DISASSEMBLY/ASSEMBLY)
2016-2019 CX-3 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C UNIT
DISASSEMBLY/ASSEMBLY)
2016-2019 CX-9 - (FRONT A/C UNIT REMOVAL/INSTALLATION) and (FRONT A/C UNIT
DISASSEMBLY/ASSEMBLY)
2016-2019 MX-5 - (A/C UNIT REMOVAL/INSTALLATION) and (A/C UNIT
DISASSEMBLY/ASSEMBLY)
2. Make sure the radiator cap is removed, then drain the coolant from the radiator drain plug as much as
possible.
3. Tighten the radiator drain plug.
4. Refill the cooling system with FL22 (55% premix) coolant at the radiator filler neck until it is close to the
top of the filler neck.
NOTE: DO NOT use water to adjust the coolant concentration. Minerals contained in the water may
generate deposits that can cause clogging of the cooling system and rust on the parts. Using service
coolant (FL22 55% pre-diluted) with a specified quality of water is the solution.
Page 7 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
5. Install the radiator cap.
CAUTION: The lower radiator hose will get hot when the thermostat is opened.
6. Start the engine and warm-up the engine to normal operating temperature to open the thermostat (engine
cooling fan comes on with climate control turned off).
7. Mix the coolant in the cooling system using the following steps:
a. Run the engine at 2,500 rpm for 5 min.
b. Maintain the engine speed at 3,000 rpm for 5 seconds, then allow the engine to idle.
c. Repeat steps (a) and (b) several times.
8. Repeat the step 2 – 7 to replace the coolant a second time.
9. Allow the engine to cool down so that you can safely remove the reservoir tank.
10. Drain the old coolant from the reservoir tank and then reinstall it.
11. Replace the coolant in the reservoir tank with the new FL22.
12. Inspect the engine coolant and reservoir tank levels and adjust with new FL22 as needed.
13. Verify repair.
PARTS INFORMATION
Page 8 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
Parts Number
Description
Qty.
Note 1
****-61-A10*
Heater Unit Core
1
---
****-68-162*
Trim Clip
0 or 2
****-11-003*
or
****-11-007*
or
****-81-200*
Bolt, Steering Wheel
1
****-32-099*
Bolt, Intermediate
Shaft Upper
1
****-32-099*
Bolt, Intermediate
Shaft Lower
1
9YA0-20-682
Bolt, Dashboard
(Not necessary for MX5)
1 or 2
****-61-J17*
O-Ring, Cooler PipeLow
1
****-61-J17*
or
****-61-J19*****61-J17*
or
****-61-J19*****61-J17*
or
****-61-J19*
O-Ring, Cooler PipeHigh
1
****-61-J17*
or
****-76-754*
O-Ring, Expansion
Valve-Low
1
****-61-J17*
or
****-61-J19*
O-Ring, Expansion
Valve-High
1
****-61-242*
or
****-15-182*
Clip, Heater Hose
0 or 2
****-61-D10*
Heater Unit Core, Rear
1
Non-reusable part
Note 2
Use GEPC with VIN for
part number
Page 9 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
****-61-J17*
****-61-J17*
0000-77-508E-20
5555-FG-002
Last Issued: 11/04/2019
O-ring,
Expansion Valve, Low
2
O-ring,
Expansion Valve, High
2
FL22 Coolant
As
needed
Refrigerant
As
needed
For vehicles with
rear heater
---
Page 10 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
Mazda6 images are shown
Trim Clip
Heater Unit Core
Bolt, Intermediate Shaft Upper
Bolt, Intermediate Shaft Lower
O-Ring, Expansion Valve
Bolt, Steering Wheel
Bolt, Dashboard
O-Ring, Cooler Pipe Low
O-Ring, Cooler Pipe High
Clip, Heater Hose
Page 11 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.
Bulletin No.: 07-007/19
Last Issued: 11/04/2019
WARRANTY INFORMATION
NOTE:



This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under Mazda’s New Vehicle Limited Warranty term.
Additional diagnostic time cannot be claimed for this repair.
Warranty
Type
A
Symptom
Code
59
Damage
Code
93
Part
Number
Main
Cause
****-61-A10*
Quantity
1
Operation
Number /
Labor
Hours:
XXN7TXRX
2014-2018 Mazda3
4.7 Hrs.
2019 Mazda3
4.8 Hrs.4.8 Hrs.4.8 Hrs.4.8 Hrs.4.8 Hrs.4.8 Hrs.
Mazda6
4.7 Hrs.4.7 Hrs.
CX-3
CX-5
4.8 Hrs.
CX-9 2WD
6.8 Hrs.
CX-9 4WD
7.4 Hrs.
MX-5
4.3 Hrs.
Perform the diagnosis procedure, replace the heater core and replace engine coolant twice.
NOTE: Enter coolant, refrigerant and all replacement parts as Related Parts.
Page 12 of 12
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2019 Mazda North American Operations, U.S.A.