Rusty Bearing Hum

Some 2009-2013 Mazda6 vehicles may exhibit an unusual humming noise from the front wheel bearings. This may be caused by muddy water entering the wheel bearing(s), causing the bearing(s) to rust. A new bearing seal design has been improved to eliminate this concern.

Be sure to replace the retaining clip (A), dust cover (B), locknut (C) and wheel bearing (D).

Verify the concern.
Raise the vehicle on a lift.
Turn the front wheels by hand to identify the side(s) with the issue.
Perform a wheel bearing excessive play inspection according to the MS3 online instructions or workshop manual section 03-11.
Replace the affected wheel bearing(s) per MS3 online or workshop manual section 03-11.
Be sure to replace the retaining clip, dust cover and locknut with new components during the wheel bearing replacement.

Part number Item

GS3L-33-047A………….Wheel bearing (2.5L)

GS4H-33-047A………….Wheel bearing (3.7L)

GE4T-33-048……………Retaining clip (2.5L)

D651-33-042A…………..Locknut (2.5L)

GS4H-33-048……………Retaining clip (3.7L)

GAM6-33-042…………...Locknut (3.7L)

GS3L-33-271…………….Left dust cover (2.5/3.7L)

GS3L-33-261…………….Right dust cover (2.5/3.7L)

Last modified onThursday, 17 November 2016 09:10

Tags: Mazda, Mazda 6, noise, wheel bearing, Bearing

Thursday, 17 November 2016 08:11

Related items

Video: how to remove and fit cartridge wheel bearing on vehicle
Step-by-step guide shows correct dismounting and mounting process of first gen wheel bearing... Read more
Korea introduces tougher tyre noise standards
The Korean Ministry of Environment has announced that domestic and overseas tyre manufacturers will be obliged to indicate the noise level of their products from 2019. The policy announced in Korea on Monday follows the E.U. standards as well, the ministry said, and will be applied to tiyes on passenger vehicles starting in 2019, and for all tyres by... Read more
Stay on top of automotive technology
Today's increasingly complex vehicles require repair professionals to have in-depth technical... Read more
NSK set to reveal new automotive aftermarket strategy
Based on its position of strength as an OEM and first tier supplier, NSK is announcing its entry into the Independent Automotive Aftermarket (IAM). In order to help the company gain market share as quickly as possible, NSK has developed a carefully structured aftermarket approach strategy that will also ensure its partners and garage owners become more profitable, efficient and... Read more
Just a Test Noise
This bulletin applies to 2011 Mazda 2 vehicles. Some customers may complain about a slight clunk, bang or jolt from the front of the vehicle after starting the engine and as the vehicle first begins to move... Read more