TSB SA-056-25 — Mazda Service bulletin
SA-056-25 is a service bulletin on file with NHTSA for 2 Mazda models, 2016–2022 model years. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. When inspected, the differential or PTO oil is dark or black. This is considered normal and NO repair should be performed. During production, differential ring and pinion gears receive a manganese phosphate coating (commonly referred to as black oxide). This coating forms a…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Vehicles and model years SA-056-25 names
Every document filed under SA-056-25
| Document ID | Filed | Type |
|---|---|---|
| SA-056-25 | November 27, 2025 | Service bulletin |
What SA-056-25 covers
Transmission & drivetrain — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB SA-056-25?
SA-056-25 is a service bulletin filed with NHTSA by Mazda, covering 2 Mazda models across the 2016–2022 model years. NHTSA's summary reads: When inspected, the differential or PTO oil is dark or black. This is considered normal and NO repair should be performed. During production, differential ring and pinion gears receive a manganese phosphate coating (commonly referred to as black oxide). This coating forms a…
Which vehicles does SA-056-25 cover?
NHTSA's file names Mazda CX-5 (2017–2019); Mazda CX-9 (2016–2020, 2022). 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 SA-056-25 a recall, and is the repair free?
No. SA-056-25 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 SA-056-25?
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 SA-056-25, 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 SA-056-25. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.