Subaru bulletin 15-308-23R
Subaru filed this with NHTSA as a service bulletin dated Aug 20, 2026, received Aug 5, 2024, about the electrical system — 5 documents under this number. It names 92 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 Service Information Bulletin outlines a systematic procedure for diagnosing parasitic draw (dark/standby current) in vehicles experiencing battery drain when the ignition is off, leading to no-start conditions or frequent jump-starts. This is an revised version of the original bulletin.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 15-308-23R | Service bulletin | Aug 20, 2026 | 11036807 | not yet checked |
| 15-308-23R | Service bulletin | Oct 28, 2025 | 11024869 | not yet checked |
| 15-308-23R | Service bulletin | Sep 10, 2024 | 11008263 | not yet checked |
| 15-308-23R | Service bulletin | Aug 15, 2024 | 11006932 | not yet checked |
| 15-308-23R | Service bulletin | Jul 17, 2024 | 11005614 | 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 47 more model years on this site.
Also filed against model years this site has no page for: 2021 Subaru BRZ; 2017 Subaru XV Crosstrek; 2022 Subaru XV Crosstrek; 2023 Subaru XV Crosstrek; 2024 Subaru XV Crosstrek.
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 15-308-23R 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 15-308-23R 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 15-308-23R cover?
The manufacturer filed it against 92 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.