Technical
Service Bulletin

Mazda North American Operations
Irvine, CA 92618-2922

Subject:
CLICK NOISE FROM FRONT BRAKES

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

APPLICABLE MODEL(S)/VINS
2016-2020 CX-9

DESCRIPTION
Some vehicles may exhibit a click noise from the front brakes under one of the following conditions:




When first moving the vehicle forward or reverse from a stop.
When first applying the brakes while the vehicle is moving forward at slow speeds.

Due to deteriorated grease between the brake pads and the shim, the front brake pads move
upward/downward along with the brake rotors during brake application. When the vehicle moves or the
brakes are applied the next time, the front brake pads move to the other side, which causes a click noise.
Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE
1. Verify the customer concern.

Page 1 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

1 Guide plates

2 Caliper
3 Mounting Support

NOTE: This repair includes attaching the protectors to the original guide plates (1), then apply white grease
to the specified locations as outlined below.
2. Remove the front brake pads (both sides) according to MGSS online (DISC PAD (FRONT)
REPLACEMENT).
3. Clean the guide plates (1) and the guide plate seating area of the mounting support (2) using brake
cleaner or equivalent.

Page 2 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

4. Attach protector (4) to the removed guide plates (3) (as shown below).
5. Reinstall the guide plate (3) to the mounting support (2).

Page 3 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

NOTE: When the protector (4) is properly attached, there should be no clearance between the guide plate
and mounting support.
6. Clean the end (1) of the pistons (pad-to-shim contact surface) and the caliper clips (2) (shim contact
area) using brake cleaner or equivalent. Also, wipe off old grease from the pad-to-shim contact surface,
including molded holes and from the inner/outer shims (all shims).

7. Push the pistons into the caliper using a commercially available disc brake expanding tool.

Page 4 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

8. Verify that the dust seal installation position is lower than the piston surface (as shown below).

Page 5 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

• If the dust seal protrudes from the piston surface, install the SST (as shown below) and press the dust
seal back to the correct position.

9. Lightly and evenly apply white grease to the end of the pistons (as shown below).
NOTE:





Use one (1) package of grease (5g) per side.
Do not allow the grease to stick to the friction surfaces of the brake pads and discs.
Do not allow the grease to stick to the piston boot rubber areas.

10. Lightly and evenly apply white grease to the caliper clips (shim contact area) as shown below.
NOTE: During caliper installation, make sure the grease applied to the parts is not scraped off.

Page 6 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

CAUTION:DO NOT allow the grease to stick to the guide plate seating areas and guide plates (as shown
below).

Page 7 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

11. Lightly and evenly apply the remaining white grease between the cleaned pad and the shim.
a) Evenly apply 1/4 of the white grease over the back of the pad, then install the rubber coated shim.
NOTE: In case of a multi-layer shim, apply half of the white grease over the back of the pad, then install the
multi-layer shim.

b) Evenly apply 1/4 of the white grease over the rubber coated shim then install the outer shim.

Page 8 of 9
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.
02/20/2020 3:53 PM tlawrenc

Bulletin No.: 04-004/20

Last Issued: 02/20/2020

c) Apply remaining half of the white grease to the other combination of pad and shim.
d) Apply the other package of the white grease to the other side of the vehicle.
12. Install the pads and shims and other parts according to MGSS online (DISC PAD (FRONT)
REPLACEMENT).
13. After completing the installation, depress the brake pedal a few times and confirm that the brake pedal
does not feel spongy.
14. Verify the repair.

PARTS INFORMATION
Parts Number Description Qty.

Notes

L2Y7-33-247

Grease

1

2 x (5g each)

L2Y7-43-782

Protector

1

50 pcs. (8 needed per vehicle)

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

35

Damage Code

9E

Part Number Main Cause
Quantity
Operation Number / Labor
Hours:

L2Y6-33-29Z
0
XXRC3XRX / 0.6 Hrs.

NOTE:




Claim Grease (L2Y7-33-247) and Protector (L2Y7-43-782) as related parts.
Claim Protector as a related part for the first time repair.

Page 9 of 9
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.
02/20/2020 3:53 PM tlawrenc