Service bulletins for the 1999 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.
176 on file from NHTSA, as of 2026-10-19.
By type
By component
| No. 33-20 | 2020-10-01. Service bulletin. ENGINE AND ENGINE COOLING. Overview of Approved Porsche C20 Engine Oils |
|---|---|
| PIWIS2001ac | 2020-10-01. Service bulletin. ELECTRICAL SYSTEM. Information on PIWIS Tester III Online Update 39.700.000, .010 & .012 |
| No. 56-20 | 2020-09-02. Service bulletin. ELECTRICAL SYSTEM:WIRING; EQUIPMENT:ELECTRICAL:INFOTAINMENT. Information on Classic Radio options for the 996 and 986 models. |
| Charging lockup | 2020-07-02. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Info on a new customer tool for looking up campaigns and recalls on their vehicle. |
| No. D4a | 2020-07-02. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Document showing the evolution of Porsche Vehicles since 1948. |
| PIWIS2001v | 2020-07-02. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Information on new PIWIS tester update 39.500.020 and .025. |
| No. 19-20 | 2020-07-01. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. List of approved engine oils for classic vehicles. |
| No. 16-20 | 2020-06-01. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. List of approved A40 engine oils for all applicable vehicles as of 1984. |
| 122-M8J3B-05 | 2020-05-04. Service bulletin. ENGINE AND ENGINE COOLING. List of approved C40 engine oils for all Porsche models since 1984. |
| 122-F4J4K-04 | 2020-04-02. Service bulletin. ENGINE AND ENGINE COOLING. List of approved engine oils for all Porsche models. |
| 122-J4L4X-03 | 2020-03-05. Service bulletin. EQUIPMENT. Bulletin outlining new blitz table replacement castors due to a high rate of failure reported by dealers. |
| 122-H6D8D-03 | 2020-03-05. Service bulletin. ELECTRICAL SYSTEM. Bulletin outlining new PIWIS tester update 39.100.030 & .035 |
| 122-H6M8Z-01 | 2020-01-04. Service bulletin. EQUIPMENT. Porsche Intranet posting outlining the Warranty Credit stop that takes place at the end of every calendar year. |
| 122-H4F7Z-01 | 2020-01-03. Service bulletin. EQUIPMENT. Updated worksheet for Chassis and VIN numbering system. Updated to include 2020 Models including the Taycan. |
| 122-L7Q9T-01 | 2020-01-03. Service bulletin. EQUIPMENT. Updated bulletin with the full list of Porsche model type designations. |
| 122-Y9Z9P-01 | 2020-01-03. Service bulletin. EQUIPMENT. Information about new PIWIS Tester updates 39.000.022 and 39.050.000 |
| 122-T4D2V-11 | 2019-11-01. Service bulletin. EQUIPMENT. Parts withdrawal for sealing grease used for sports cars. |
| 122-S3R9Q-11 | 2019-11-01. Service bulletin. ELECTRICAL SYSTEM. New PIWIS Tester update 38.800.030 |
| 122-H6S4J-11 | 2019-11-01. Service bulletin. ELECTRICAL SYSTEM. New PIWIS Tester update 38.800.020 |
| 122-Z3C2E-10 | 2019-10-15. Service bulletin. ELECTRICAL SYSTEM. Announcement of new Tech Live look, which will put technicians into live chats with technical support if they should have an urgent issue |
| 122-L8R6J-10 | 2019-10-15. Service bulletin. ELECTRICAL SYSTEM. Bulletin highlighting new updates 38.750, 38.750.000 for the Porsche PIWIS Tester 3 |
| 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. |
| 122-X2X7N-07 | 2019-07-08. Service bulletin. ENGINE AND ENGINE COOLING. Notice to dealers that coolants will be moved out of the special tool cabinet in the dealer service department in order to make room for new special tools. All coolant tools will be moved to the "Coolant Cart" because they need to be housed in the same place. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.