TSBs

Quieting Audi axle noise

July 25, 2024

This bulletin applies to 2018-2024 Audi A3, S3 and RS 3 vehicles, 2018 A3 Sportback etron, 2018-2019 A3 Cabriolet and 2019-2024 Q3 vehicles.

Motor Age Staff

Related To: Mitchell 1

Clean the drive axle threads and apply two rings of the liquid locking compound (see red lines for application). Allow eight hours of cure time.

This bulletin applies to 2018-2024 Audi A3, S3 and RS 3 vehicles, 2018 A3 Sportback etron, 2018-2019 A3 Cabriolet and 2019-2024 Q3 vehicles.

A cracking noise may be heard from the front end when changing direction (when pulling away, there is a one-off cracking noise after changing direction).

This indicates relative movement of the drive axle in the wheel bearings. Improved drive axles were gradually introduced in production.

Disassemble the affected drive axle. Apply liquid locking fluid P/N d 154100A1 around the threaded end as shown in the image.

After assembling the drive axle, the vehicle must not be operated for at least eight hours to allow proper cure time.

About the Author

Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored.