Service bulletins for the 2021 Porsche Cayenne
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.
829 on file from NHTSA, as of 2026-10-19.
About P25B4 on the 2021 Porsche Cayenne: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P25B4 are shown. Show all
| No. 250-22 | 2023-01-10. Service bulletin. ENGINE AND ENGINE COOLING. Technical information for a check engine warning light is active in conjunction with fault memory entry “P25B400” in the DME control unit |
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| No. 2230 | 2022-10-05. Service bulletin. ENGINE AND ENGINE COOLING. Instructions on advanced technical information - DME Fault P25B400 (008403) “Wastegate, turbocharger bank 1 – stuck closed |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.