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Service bulletins for the 2020 Audi A6

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.

1382 on file from NHTSA, as of 2026-10-19.

About C12B3 on the 2020 Audi A6: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: C12B3 are shown. Show all

Bulletins, newest first
TSB_2054202_82026-10-05. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when there is an Audi adaptive light system malfunction; DTC C12B3FA is stored in the control module for driver assistance systems.
TSB_2054202_72026-04-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the Audi adaptive light system malfunctions; DTC C12B3FA is stored in the control module.
TSB_2059201_92025-11-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module.
TSB_2054202_62025-11-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides informaton when there is an adaptive light system malfunction; DTC C12B3FA stored in the control module for driver assistance systems.
A9624112059201_82024-12-04. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module.
A9623852059201_62023-05-05. Service bulletin. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. This bulletin contains information for when the message appears in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9622772059201_52022-05-05. Service bulletin. EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH; ELECTRICAL SYSTEM:SOFTWARE. This bulletin contains information for when the messages appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9622752054202_52022-02-04. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE LIGHTING; EQUIPMENT. This bulletin contains repair information for when there is an Audi adaptive light fault with DTCs C12B3FA.
A9621632059201_42021-04-06. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information for when the messages appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9020692056016_22020-10-06. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:ADAS. This bulletin contains repair instructions for DTC C12B3F2.
A9020532059889_12020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for creating a PSS when DTC C12B3FB or B200FF3 appears with an Audi Adaptive light or Adaptive Driver Assistant malfunction displayed in the instrument cluster.
A9620532059201_32020-07-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information for when the messaegs appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9620512059201_22020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information for when the messaegs appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9620492059201_12020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information for when the messaegs appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD.
A9619472054202_42020-01-08. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains repair information for when there is an Audi adaptive light fault with DTCs C12B3FA.
A9019282056016_12019-09-09. Service bulletin. FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE LIGHTING. This bulletin contains repair instructions for DTC C12B3F2.
A9619402054202_32019-08-07. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY. This bulletin contains repair information for when there is an Audi adaptive light fault with DTCs C12B3FA. Audi e-tron quattro

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