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Service bulletins for the 2021 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.

750 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
No. 122-202023-04-06. Service bulletin. SERVICE BRAKES, HYDRAULIC. Technical information on a complaint - brake noise
WNK52023-03-07. Service bulletin. EQUIPMENT. Porsche intranet posting with information on workshop campaign WNK5 - exchanging spreader device
WNK62023-03-06. Service bulletin. EQUIPMENT. Porsche intranet posting with information on workshop campaign WNK6 - exchanging spreader device
No. 08-232023-03-04. Service bulletin. FUEL SYSTEM, GASOLINE. Manufacturers certificate for approved engine C40 oils for MY23.
PIWIS2301k2023-03-04. Service bulletin. EQUIPMENT. Information for PIWIS tester update 41.750.045 & .046
No. 23032023-03-04. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Special tools information for the pneumatic cartridge gun.
No. 166-22-42023-03-04. Service bulletin. PARKING BRAKE. Technical information on WNK6 - replacing spreader device
No. 140-22-22023-03-04. Service bulletin. PARKING BRAKE. Technical information on WNK5 - exchanging spreader device
No. 07-232023-03-04. Service bulletin. ENGINE AND ENGINE COOLING. Overview of approved engine C30 oils for all Porsche models that use C30 oil.
No. 06-232023-03-04. Service bulletin. ENGINE AND ENGINE COOLING. Overview of approved engine C20 oils for all Porsche models that use C20 oil.
No. 103-202023-03-04. Service bulletin. ELECTRICAL SYSTEM. Technical information for a complaint - selector lever button lighting not functioning intermittently
WLM62023-02-07. Service bulletin. SERVICE BRAKES, HYDRAULIC; EQUIPMENT. Porsche intranet posting with information on workshop campaign WLM6 - check brake lines on the front axle and replace them if necessary
No. 61-222023-02-07. Service bulletin. WHEELS. Manufacturers certificate for approved wheels and tires.
No. 48-222023-02-07. Service bulletin. WHEELS. Manufacturers certificate for approved wheels and tires
No. 197-202023-02-06. Service bulletin. SERVICE BRAKES, HYDRAULIC; EQUIPMENT. Technical information for WLM6 - checking brake lines on the front axle and replace if necessary.
No. 239-222023-02-06. Service bulletin. SEATS. Technical information for ANB6 - checking threaded joint seat belt mount at the left and right and replacing seat frame if necessary.
No. 31-202023-02-06. Service bulletin. ELECTRICAL SYSTEM. Technical information for a diagnosis and handling of the 12 volt battery (on-board battery)
No. 239-222023-01-10. Service bulletin. SEATS; SEAT BELTS. Information for technical information on ANB6 - checking threaded joint for seat belt mount at the left and right and replacing seat frame if necessary.
No. 22-212023-01-10. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. Installation and conversion instructions for the 911 Turbo - sport design package.
No. 22362023-01-10. Service bulletin. ENGINE AND ENGINE COOLING. Instructions on advanced technical information for a 911 - injector fault.
No. 2229.52023-01-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. Instructions on advanced technical information for the Cayenne and 911. An update to the conbox current draw discharges 12v battery.
No. 159-21-12023-01-10. Service bulletin. ELECTRICAL SYSTEM. Information on technical information for a complaint involving the Cayenne, Cayman, Boxster, Macan, and 911. The SD map update/OTA map update does not function
No. 6-212023-01-10. Service bulletin. VISIBILITY. Installation and conversion instructions for the dashcam on the 911.
No. 22332023-01-10. Service bulletin. STEERING. Instructions on advanced technical information for the 911.
No. 22342023-01-10. Service bulletin. ELECTRICAL SYSTEM. Instructions on advanced technical information for improper odometer and speedometer function

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.