Service bulletins for the 1990 Porsche 928
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.
81 on file from NHTSA, as of 2026-10-19.
By type
By component
| 122-Z6Y7L-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.030 & 035. |
|---|---|
| 122-E4R8U-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.020. |
| 122-B3Y6H-09 | 2019-09-23. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining PIWIS Tester updates 38.600.000, .010, & .015. |
| PK-D8-16 | 2011-06-20. Service bulletin. UNKNOWN OR OTHER. PORSCHE: INFORMATION ON HOW TO READ THE VIN. *RM |
| 0302 | 2004-02-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. INTAKE MANIFOLD TUNING FLAP OUT OF ALIGNMENT OR SEIZED DUE TO WORN OUT BUSHINGS. *TT |
| GRP4/9310 | 1995-11-01. Service bulletin. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS. BRAKE VIBRATION DAMPER APPLICATION - NEW DAMPING PLATE WITH STEEL CLIP. *TW |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.