Drivetrain - Humming Noise From Rear Wheel Bearing

Bulletin No: 03-002/08

Last Issued: 11/11/2008

Subject: REAR WHEEL BEARING HUMMING NOISE

BULLETIN NOTE
This bulletin supersedes the previous bulletin 03-002/08 issued 04/11/08.. The DESCRIPTION, REPAIR PROCEDURE and PART(S) INFORMATION have been revised.

APPLICABLE MODEL(S)/VINS
2007 CX-7 2WD vehicles with VINs JM3ER******101015 - 157823 (produced Apr. 1, 2006 to Dec. 31, 2006)

2007 CX-9 2WD vehicles with VINs JM3TB******100001 - 106940 (produced before Dec. 31, 2006)

DESCRIPTION

Some vehicles may experience a humming noise from the rear of the vehicle. This noise may be due to the improper shape of the ABS wheel sensor, which allows road debris (water, dirt, etc.) to enter the bearing.





The shape of the ABS wheel sensor has been modified to eliminate the concern.

Customers having this concern should have their vehicle repaired using the following repair procedure.

REPAIR PROCEDURE

1. Verify customer concern.





2. Replace both rear wheel hub components and rear ABS wheel-speed sensors with modified parts according to Workshop Manual (section 03-12 WHEEL HUB COMPONENT REMOVAL/INSTALLATION [2WD] and section 04-15 REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION [2WD]).

NOTE:
BE SURE TO FIT THE REAR ABS WHEEL-SPEED SENSOR IN THE CENTER, DO NOT ALLOW THE SENSOR TO BE PRESS FITTED OFF-CENTER.

3. Verify repair.





PART(S) INFORMATION





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.