3 L4-2.5L (2010)
Front Cross-Member: All Technical Service Bulletins
Suspension - Front End Clunk/Knock On Bumps
Bulletin No: 02-006/10
Last Issued: 10/22/2010
Subject:
KNOCK / CLUNK NOISE FROM FRONT WHEN GOING OVER BUMPS
APPLICABLE MODEL(S)/VINS
2010 Mazda3 vehicles with VINS lower than JM1BL******336667 (produced before June 1, 2010)
DESCRIPTION
Some vehicles may experience a knock / clunk noise from the front of the vehicle when going over bumps. Typically the noise occurs at the right front of
the vehicle with only the right front tire. Due to the impact while going over bumps, a vertical force is applied to the crossmember through the stabilizer
which causes crossmember movement on the bushing. This movement is caused by the change of the surface characteristics of the bushing during hot
ambient temperatures in summer. Less holding force during cold temperatures results in movement and stick-slip noise at the bushing (A) near the front
(F) of the front crossmember. The bushing is now modified to reduce the movement.
NOTE:
This concern is best duplicated with cold ambient temperatures below 55 degrees F (12.8 degrees C). Once the vehicle has warmed up, the concern may
be difficult to duplicate.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Verify customer concern by checking if noise occurs during cold temperatures.
NOTE:
It is only necessary to replace the front side bushings of the front crossmember.
2. Remove the crossmember from the vehicle. Refer to MS3 online instructions or Workshop Manual section 02-13 FRONT CROSSMEMBER
REMOVAL/INSTALLATION.
3. Press out the bushing from the crossmember using SST 49 B018 002 and 49 T034 201A as shown.
