TSBs

Replacing affected Subaru axle shafts

June 17, 2025

This bulletin applies to 2020-2023 Subaru Outback and 2019-2023 Forester vehicles.

Mike Mavrigian

Related To:

Mitchell 1

Old and new axle shaft assemblies for Outback. Note the increase in joint dimensions.

Comparison of old and new axle shaft assemblies for Forester vehicles.

This bulletin applies to 2020-2023 Subaru Outback and 2019-2023 Forester vehicles.

A design change has been made to the front axle assemblies to address cases of a clicking/cracking type sound when driving with the steering wheel in the fully locked left or right position.

The size of the joint has been increased to provide added durability. Replace the affected side with the newly designed drive axle shaft assembly. The assemblies are not required to be replaced in pairs. Replace only the affected side.

The new design front drive shaft for Outback is P/N 28321AN030. Forester shaft is P/N 28321SJ010. Both require one-time-use nut P/N 902170049.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.