04-007-20-3713

Technical
Service Bulletin
Mazda North American Operations
Irvine, CA 92618-2922
Subject:
GRINDING NOISE FROM REAR BRAKES
Bulletin No.: 04-007/20
Last Issued: 10/12/2020
APPLICABLE MODEL(S)/VINS
US Spec.:
2019-2020 CX-3 vehicles with VINs lower than JM1DK******470844 (produced before Jan. 31, 2020)
2016 CX-5 vehicles with VINs lower than JM3KE******921726 (produced before Dec. 21, 2016)
2017-2020 CX-5 vehicles with VINs lower than JM3KF******820235 (produced before Mar. 18, 2020)
2016-2019 CX-9 vehicles with VINs lower than JM3TC******337679 (produced before Oct. 31, 2019)
2016 Mazda6 vehicles with VINs lower than JM1GJ******488592 (produced before Jun. 30, 2016)
2017-2020 Mazda6 vehicles with VINs lower than JM1GL******523660 (produced before Mar. 13, 2020)
Mexico Spec.:
2016-2017 CX-5 vehicles with VINs lower than JM3KE******921726 (produced before Dec. 21, 2016)
2018-2020 CX-5 vehicles with VINs lower than JM3KF******820235 (produced before Mar. 18, 2020)
2017-2020 Mazda6 vehicles with VINs lower than JM1GL******523373 (produced before Feb. 28, 2020)
DESCRIPTION
Some vehicles equipped with electric parking brake (EPB) may exhibit a grinding noise from the rear brakes
when braking. This may be caused by the rear brake pads not having the capability to remove the rust from
the rear brake discs. The red rust accumulated on the discs is exposed to high temperatures during braking,
and consequently the rust turns black. As the black rust is too hard to be removed by the brake pads, the
rust progress is accelerated, resulting in the grinding noise.
To eliminate this concern, the brake pad material has been changed in order to improve the rust-removing
capability.
Page 1 of 4
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.
© 2020 Mazda North American Operations, U.S.A.
10/13/2020 4:50 PM tlawrenc
Bulletin No.: 04-007/20
Last Issued: 10/12/2020
Outer Side
Inner Side
Customers having this concern should have their vehicle repaired using the following repair procedure.
NOTE: For 2016-2020 CX-5 / CX-9 vehicles with rear brake disc grooves, refer to TSB 04-003/20 GROOVES ON REAR BRAKE DISC PLATES
REPAIR PROCEDURE
1. Verify the customer concern.
2. Replace the rear brake pads with modified ones according to MGSS online:




CX-3: REAR BRAKE DISC PAD REMOVAL/INSTALLATION
CX-5: REAR BRAKE DISC PAD REMOVAL/INSTALLATION
CX-9: REAR BRAKE DISC PAD REMOVAL/INSTALLATION
Mazda6: REAR BRAKE DISC PAD REMOVAL/INSTALLATION
3. Replace the rear disc plates with new ones according to the MGSS online:




CX-3: REAR BRAKE DISC REMOVAL/INSTALLATION
CX-5: REAR BRAKE DISC REMOVAL/INSTALLATION
CX-9: REAR BRAKE DISC REMOVAL/INSTALLATION
Mazda6: REAR BRAKE DISC REMOVAL/INSTALLATION
NOTE: If an on-car brake lathe is available, disc plates may be machined instead of replaced.
4 Verify the repair.
Page 2 of 4
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.
© 2020 Mazda North American Operations, U.S.A.
10/13/2020 4:50 PM tlawrenc
Bulletin No.: 04-007/20
Last Issued: 10/12/2020
PARTS INFORMATION
Parts Number
Description
Qty.
DHYG-26-43Z
Pad Set, RR Caliper
1
B45G-26-251B
Plate, Disc
0 or 2
GDYL-26-43Z
Pad Set, RR Caliper
1
GHT2-26-251
Plate, Disc
0 or 2
TAY0-26-48Z Pad Sub Set, RR Caliper
TK78-26-251A
Plate, Disc
KBY6-26-48Z Pad Sub Set, RR Caliper
K011-26-251C
Plate, Disc
1
0 or 2
1
0 or 2
Notes
CX-3
Mazda6
CX-9
CX-5
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.
If brake discs are REPLACED
Warranty Type
A
Symptom Code
53
Damage Code
9Y
Part Number Main Cause
7777-SP-S18
Quantity
1
Operation Number / Labor Hours:
Pad Set Replacement (Both Sides)
AND
(*1) Brake Disc Replacement (Both
Page 3 of 4
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.
© 2020 Mazda North American Operations, U.S.A.
10/13/2020 4:50 PM tlawrenc
Bulletin No.: 04-007/20
Last Issued: 10/12/2020
Sides)
P0208*RX / 0.6 to 0.7 Hrs.
NOTE: Claim replaced discs as related part. *1: Submit an applicable labor time by referring to the SRT
manual.
If brake discs are MACHINED
Warranty Type
A
Symptom Code
53
Damage Code
9Y
Part Number Main Cause
Quantity
Operation Number / Labor
Hours:
7777-SP-S18
1
Pad Set Replacement (Both Sides)
AND
Brake Disc Machining (Both Sides)
P0214*MT / Actual Time (*2)
*2: Take the necessary procedures for the actual time submission according to the Warranty Policy &
Procedures Manual.
Page 4 of 4
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.
© 2020 Mazda North American Operations, U.S.A.
10/13/2020 4:50 PM tlawrenc