Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
TCS / DSC INDICATOR LIGHT ON WITH DTC C0051:62 / TPMS
WARNING LIGHT ON AFTER FLASHING

Bulletin No.: 04-003/19

Last Issued: 06/27/2019

BULLETIN NOTES
This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text.

Previous TSBs: Date(s) Issued:
04-003/19

04/25/2019

04-007/18

09/07/2018

04-003/13

09/17/2013

DESCRIPTION
APPLICABLE MODEL(S)/VINS
US Spec.
2013-2016 CX-5 vehicles with VINs lower than JM3KE******921726 (produced before Dec. 21, 2016)
2017-2018 CX-5 vehicles with VINs lower than JM3KF******476255 (produced before Sept. 29, 2018)
Mexico Spec.
2013-2017 CX-5 vehicles with VINs lower than JM3KE******921726 (produced before Dec. 21, 2016)
2018 CX-5 vehicles with VINs lower than JM3KF******472983 (produced before Sept. 18, 2018)
Some vehicles may experience the TCS/DSC indicator light and the TPMS warning light both ON with DTC
C0051:62 stored in memory.



DTC C0051:62 - The difference between the initial learned value of the steering angle (as
calculated by each sensor) and the steering angle (as calculated by the steering angle sensor)
while driving in a straight line, has exceeded its allowable tolerance (or threshold).

NOTE: For vehicles equipped with the Smart City Brake System (SCBS), the master warning light also
comes ON with the message "SCBS Inspection Required" in the display.
The symptoms may occur when the following conditions are met:



After starting the engine, the vehicle is driven backwards while the steering wheel is turned to the
left or to the right or going forward over a bump while turning the steering wheel. The vehicle is
then driven forward and begins accelerating while the steering wheel is still turned.

Page 1 of 3
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.: 04-003/19

Last Issued: 06/27/2019

To eliminate this concern, the DSC HU/CM software has been changed.
Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE
1. Verify the customer concern.
2. Verify that DTC C0051:62 is stored in memory.
3. Verify that all of the following statements are true:





The customer stated that the symptom occurred after the vehicle was driven backwards or forward
with the steering wheel turning right after the engine is started.
There are no EPS CM related DTCs stored in memory.
Even if an EPS CM related DTC is stored in memory, there is no failure found with the EPS CM.

4. If the statements above are all true, replace the DSC HU/CM with a modified part according to the
instructions on MGSS online:




(DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER
DEACTIVATION)]).
(DSC HU/CM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT
CYLINDER DEACTIVATION)]).

5. Verify the repair.

Page 2 of 3
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.: 04-003/19

Last Issued: 06/27/2019

PARTS INFORMATION
Part Number
Description
Qty. Model Year
Note
K0Y1-43-7A0E Hydraulic Unit-ABS 1
2013 CX-5
--KJY1-43-7A0C Hydraulic Unit-ABS 1
2014 CX-5
--KJY2-43-7A0A Hydraulic Unit-ABS 1 2014-2015 CX-5
--KAY1-43-7A0C Hydraulic Unit-ABS 1
2016 CX-5
--K1Y3-43-7A0C Hydraulic Unit-ABS 1
KBYH-43-7A0C Hydraulic Unit-ABS 1
(Check GEPC for correct
KBYW-43-7A0C Hydraulic Unit-ABS 1 2017-2018 CX-5
part number for the
KLYK-43-7A0B Hydraulic Unit-ABS 1
subject VIN)
KLYJ-43-7A0B Hydraulic Unit-ABS 1
KLYH-43-7A0B Hydraulic Unit-ABS 1

WARRANTY INFORMATION
NOTE:





This warranty information applies only to verified customer complaints on vehicles eligible for
warranty repair.
This repair will be covered under the New Vehicle Limited Warranty and California Emission
Warranty (long term), where applicable.
Additional diagnostic time cannot be claimed for this repair.

Warranty Type
Symptom Code
Damage Code
DTC
Part Number Main Cause
Quantity

A
6X
9W
C0051
(SEE PARTS INFORMATION)
1
XXJ9YXRX / 1.0 Hr. (2013-2016 CX-5)
Operation Number / Labor Hours
XXJ9ZXRX / 1.1 Hr. (2017-2018 CX-5)

Page 3 of 3
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.