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Service bulletins for the 2012 Audi A4

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.

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

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Only bulletins with component: Ignition are shown. Show all

Bulletins, newest first
Update28G62024-02-12. Service bulletin. ELECTRICAL SYSTEM:IGNITION. Ignition Coils
28G6UPDATE2023-10-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION. Ignition Coils (NVLW)
A5723082027406_52023-07-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This bulletin provides information regarding the Audi advanced key.
A9623822056019_22023-03-06. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:CONTROL MODULE. This bulletin provides instructions for when the anti-theft alarm has gone off for no reason, or did not go off at all. No DTCs are stored.
Edition832023-02-06. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:IGNITION. 97 no start
011386203363012022-10-31. Service bulletin. ELECTRICAL SYSTEM:IGNITION; ELECTRICAL SYSTEM. Because there are a number of different misfire faults (unrelated to ignition coil operation) that could cause the MIL to illuminate, proper Guided Fault Finding (GFF) misfire diagnosis must be followed before any ignition coils are replaced.
28 13 21 20175552022-05-31. Service bulletin. ENGINE; ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. Key does not stay or engage in ignition lock
37 14 42 20290272022-05-02. Service bulletin. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN. Customer may report transmission warning light is illuminated. In some cases, the vehicle will not move after being started and placed into gear. After key cycle, the vehicle drives without restriction.
37 14 34 20289852022-05-02. Service bulletin. ELECTRICAL SYSTEM:IGNITION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; UNKNOWN OR OTHER; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Transmission warning may appear in instrument cluster. After ignition cycle, the warning message is no longer present. The fault occurs with ATF temperature below 60o C. Check for this temperature range in the extended environmental conditions of the diagnosis protocol. This TSB only applies if the ATF level is correct and there are no leaks.
37 14 23 20284722022-05-02. Service bulletin. ELECTRICAL SYSTEM:IGNITION:SWITCH; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM; UNKNOWN OR OTHER. The ignition key cannot be removed even though the gear shifter is in Park (P). The vehicle is mechanically in the Park position, but this is not recognized electronically. The gear shifter cannot be moved from the Park position. On vehicles with Audi advanced key, the vehicle cannot be locked by remote control after the engine has been switched off.The Park position of the gear shifter is sporadically not recognized, which causes the ignition key to not be cleared and prevents the vehicle from being locked.
Technical Servic2021-12-27. Service bulletin. ELECTRICAL SYSTEM:IGNITION:COIL. Update Bulletin

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