Subaru bulletin 09-74-21R
Subaru filed this with NHTSA as a service bulletin dated Jun 26, 2026, received Jun 2, 2021, about the fuel/propulsion system — 10 documents under this number. It names 63 model years (2016–2026). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin provides updated parts information and a service procedure to follow for removing accumulated carbon deposits from fuel injectors and internal engine components (e.g. intake valves and / or manifold, and combustion chambers). (This is an revised version of the original bulletin.)
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 09-74-21R | Service bulletin | Jun 26, 2026 | 11034264 | not yet checked |
| 09-74-21R | Service bulletin | Dec 12, 2025 | 11027090 | not yet checked |
| 09-74-21R | Service bulletin | Jul 18, 2024 | 11005617 | not yet checked |
| 09-74-21R | Service bulletin | Sep 27, 2022 | 10222368 | not yet checked |
| 09-74-21R | Service bulletin | Sep 27, 2022 | 10222367 | not yet checked |
| 09-74-21R | Service bulletin | Aug 26, 2022 | 10219496 | not yet checked |
| 09-74-21R | Service bulletin | Sep 24, 2021 | 10201810 | not yet checked |
| 09-74-21R | Service bulletin | Aug 30, 2021 | 10201059 | not yet checked |
| 09-74-21R | Service bulletin | Jun 28, 2021 | 10198768 | not yet checked |
| 09-74-21R | Service bulletin | May 21, 2021 | 10194830 | not yet checked |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themand 23 more model years on this site.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Subaru 09-74-21R a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the 09-74-21R repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 09-74-21R cover?
The manufacturer filed it against 63 model years: 2026 Subaru Ascent, 2025 Subaru Ascent, 2024 Subaru Ascent, 2023 Subaru Ascent, 2022 Subaru Ascent, 2021 Subaru Ascent and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.