TSB CSP12 — Mazda Warranty extension
CSP12 is a warranty extension on file with NHTSA for 4 Mazda models, 2017–2021 model years, filed and re-filed as 6 documents. A TSB is factory repair guidance, not a recall — the repair is not automatically free.
What the bulletin says. CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure…
NHTSA's own summary of the document, quoted from the public manufacturer-communications file.
Worth checking your VIN against. CSP12 is filed as a warranty extension, which unlike an ordinary bulletin can mean free or reimbursed work when a vehicle qualifies. Ask a dealer using the document ID below, and check open recalls separately at nhtsa.gov/recalls.
Vehicles and model years CSP12 names
| Vehicle | Model years |
|---|---|
| Mazda CX-5 | 2017, 2018, 2019 |
| Mazda CX-9 | 2017, 2018, 2019 |
| Mazda Mazda3 | 2017, 2018, 2019, 2020, 2021 |
| Mazda Mazda6 | 2017, 2018, 2019 |
Every document filed under CSP12
Manufacturers re-issue a bulletin as the repair changes, and file separate copies for technicians and for owners. All of them carry the same number.
| Document ID | Filed | Type |
|---|---|---|
| CSP12 Parts Warr | November 18, 2024 | Warranty extension |
| CSP12 Repair MX5 | November 18, 2024 | Warranty extension |
| CSP12 Repair | November 18, 2024 | Warranty extension |
| CSP12 FAQs | November 12, 2024 | Warranty extension |
| CSP12 Dealer Letter | November 8, 2024 | Warranty extension |
| CSP12 | November 8, 2024 | Warranty extension |
What CSP12 covers
Engine, Fuel system — the component vocabulary NHTSA files this communication under.
Questions buyers ask
What is TSB CSP12?
CSP12 is a warranty extension filed with NHTSA by Mazda, covering 4 Mazda models across the 2017–2021 model years. NHTSA's summary reads: CUSTOMER SERVICE PROGRAM CSP12 - DENSO LOW-PRESSURE FUEL PUMP CUSTOMER SERVICE PROGRAM WARRANTY EXTENSION: Attention ALL Mazda Dealers: This is a Warranty Extension and not a recall campaign. Repairs are not to be made unless there is a confirmed low-pressure fuel pump failure…
Which vehicles does CSP12 cover?
NHTSA's file names Mazda CX-5 (2017–2019); Mazda CX-9 (2017–2019); Mazda Mazda3 (2017–2021); Mazda Mazda6 (2017–2019). 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 CSP12 a recall, and is the repair free?
CSP12 is filed as a warranty extension, not a recall — but this is the kind of communication that can mean free or reimbursed work if your VIN qualifies. Take the number to a dealer and ask. Recalls are separate and always free; check yours by VIN at nhtsa.gov/recalls.
How do I get the full text of CSP12?
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 CSP12, 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 CSP12. Check any specific vehicle's open recalls by VIN at nhtsa.gov/recalls.