TSB 05-84-21R — Subaru Service bulletin
05-84-21R is a service bulletin on file with NHTSA for 2 Subaru models, 2015 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years 05-84-21R names
| Vehicle | Model years |
|---|---|
| Subaru Legacy | 2015 |
| Subaru Outback | 2015 |
Every document filed under 05-84-21R
| Document ID | Filed | Type |
|---|---|---|
| 05-84-21R | December 8, 2025 | Service bulletin |
What 05-84-21R covers
Suspension — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB 05-84-21R?
05-84-21R is a service bulletin filed with NHTSA by Subaru, covering 2 Subaru models across the 2015 model years. NHTSA's summary reads: This bulletin announces availability of new front wheel hub assemblies incorporating bearing surfaces having increased resistance to imperfections resulting from shock loads.
Which vehicles does 05-84-21R cover?
NHTSA's file names Subaru Legacy (2015); Subaru Outback (2015). A bulletin number can be re-issued against more vehicles later, so check the model-year list on this page against your own.
Is TSB 05-84-21R a recall, and is the repair free?
No. 05-84-21R is repair guidance the manufacturer sent its dealers, not a safety defect finding. You pay for the work unless the vehicle is still under warranty. Recall repairs, by contrast, are always free.
How do I get the full text of 05-84-21R?
Take the document ID to a dealer's service desk, or search NHTSA's manufacturer-communications records. This page carries every document ID filed under 05-84-21R, its date, and NHTSA's own summary from the public file.
Every number on this page is a count of records in the federal complaint, recall, and investigation files published by NHTSA's Office of Defects Investigation. This page lists only what NHTSA's manufacturer-communications file records under 05-84-21R. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.