Service bulletins for the 2021 Subaru Ascent
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
384 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Tire pressure monitoring are shown. Show all
| 05-78-20 | 2020-11-05. Service bulletin. ELECTRICAL SYSTEM; TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS. This Service Information Bulletin announces additional diagnostic procedures for TPMS related DTC C2921 on the applicable models listed. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.