Service bulletins for the 1998 Porsche 911
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.
146 on file from NHTSA, as of 2026-10-19.
By type
By component
| No. 62-20 | 2021-08-04. Service bulletin. TIRES; WHEELS. List of approved wheels, tires, and spacers for the 911, for models years 1994 to 1998. |
|---|---|
| PIWIS2101ac | 2021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester update #40.300.020. |
| PIWIS2101ab | 2021-07-06. Service bulletin. EQUIPMENT. Information on PIWIS tester update #40.300.000 & .010. |
| PIWIS2101aa | 2021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester update #40.250.040 |
| No. D13.2 | 2021-07-06. Service bulletin. EQUIPMENT. Information on new PIWIS Tester program for independent repair facilities. |
| PIWIS2101z | 2021-07-06. Service bulletin. EQUIPMENT. Information on Porsche PIWIS Tester update #40.250.030 & .035. |
| STB4145-15 | 2021-06-28. Service bulletin. SUSPENSION:REAR:SHOCK ABSORBER; SUSPENSION:FRONT:SHOCK ABSORBER. As of 1994 up to 1998 Replacement shock absorbers (strut inserts) the respective chassis no longer available. |
| STB47-16 | 2021-06-28. Service bulletin. SUSPENSION:REAR:SHOCK ABSORBER; SUSPENSION:FRONT:SHOCK ABSORBER. Replacing shock absorbers (Strut inserts) |
| ATIALL41605 | 2021-06-28. Service bulletin. EQUIPMENT; SERVICE BRAKES. Understanding and addressing brake squeal complaints. |
| ATIALL1601 | 2021-06-28. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 1997 to Present - Vehicle Analysis Log Types - In an effort to prode accurate information regarding the state of the vehicle at the time fof VAL creation, a "log type" drop down menu was added at the end of the VAL creation menu. |
| PIWIS2101y | 2021-06-02. Service bulletin. EQUIPMENT. Information on Porsche PIWIS Tester III Online Update 40.200.020. |
| PIWIS2101x | 2021-06-02. Service bulletin. ELECTRICAL SYSTEM. Information on Porsche PIWIS Tester III Online Update 40.200.000, .010, .015 & .016. |
| No. 52-21 | 2021-05-05. Service bulletin. ELECTRICAL SYSTEM. Information on how to deal with a potential cyber security breach. |
| No. D4a | 2021-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Historical information on Porsche product evolution. |
| No. 13-21 | 2021-04-05. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. List of approved C20 style engine oils for classic and new Porsche models since 1984. |
| No. 09-21 | 2021-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved A40 style engine oils for new and classic Porsche vehicles MY 1984 and newer. |
| No. 08-21 | 2021-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 engine oils for new and classic Porsche vehicles MY 1984 and newer. |
| No. 07-21-1 | 2021-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C30 engine oils for all new and Classic Porsche vehicles MY1984 and newer. |
| No. 03-21 | 2021-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C20 engine oils for all new and classic Porsche models 1984 and newer. |
| PIWIS2102j | 2021-04-02. Service bulletin. EQUIPMENT. Information on PIWIS Tester update 40.000.020 & .022. |
| 122-S6Q2R-06 | 2021-03-06. Service bulletin. EQUIPMENT; SERVICE BRAKES. Resubmitting at request of Mr. Bernard Hardgrave. Advanced technical information on brake fluid for all Porsche vehicles. |
| No. 1820.1 | 2021-02-02. Service bulletin. STRUCTURE. Special tools information on a measuring and alignment system. |
| No. D536 | 2021-01-05. Service bulletin. EQUIPMENT. Information on parts withdrawal of closed workshop campaign parts. |
| No. 54-20 | 2021-01-05. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING. List of approved A40 style engine oils for new and classic Porsche models. |
| No. 53-20 | 2021-01-05. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 style engine oils for new and classic Porsche vehicles. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.