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Service bulletins for the 2019 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.

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

By type

By component

By trouble code

Bulletins, newest first
A9120612057715_22020-05-07. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). This informational bulletin states that dor DTC U101400 to not perform any repairs and that this does not affect the customer or their experience.
A1520342053278_32020-05-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for 3.0 and 2.9 TFSI engines that have oil loss around the engine compartment, front end, and underbody.
SM 25-20202020-05-07. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
A9120602054812_32020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains repair instructions for when a yellow SOS lamp appears with DTC B105313 and B153313.
A9020452059335_12020-05-07. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information on noises from the instrument cluster installation area.
A9020442032113_32020-05-07. Service bulletin. ELECTRICAL SYSTEM. This information bulletin contains a background on the outside air temperature reading.
A6420722047061_22020-05-07. Service bulletin. STRUCTURE. This bulletin contains a cleaning procedure from leftover residue from suction cups or labels.
A4320322051336_22020-05-07. Service bulletin. SUSPENSION. This bulletin contains repair instructions for DTC B200FF0.
A0120542014753112020-05-07. Service bulletin. FUEL SYSTEM, GASOLINE. This bulletin contains instructions for when to add gasoline additives for cleaning the injectors.
A5120132009967_12020-04-06. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for vehicle inspection, protection removal, and detailing.
A3920282059057_12020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains repair instructions for noises when in reverse or vibrations/humming/droning or rubbing whrn fully turning the wheel.
A3420472058875_12020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains instructions for oil leaking from the vehicle without a DTC.
A0120512057831_22020-04-02. Service bulletin. UNKNOWN OR OTHER. This bulletin contains repair instructions for DTC P201500 which may or may not have a MIL on.
A9420202017806132020-04-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains information regarding when the message 'Vehicle lights: malfunction' appears with DTC 03280, 01800, or B126AF0.
A3420462058928_12020-04-02. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL). This bulletin contains instructions for recalibrating the gear sensor when the 'P' displays begin to flicker on the selector display and in the instrument cluster display.
A0120502058890_12020-04-02. Service bulletin. ELECTRICAL SYSTEM. This bulletin contains instructions for replacing a part or performing a software update for DTC P000000.
A4820852053869_32020-04-02. Service bulletin. STEERING. This bulletin contains repair instructions for when DTC B145504 with symptom code 7340800. 48 Steering wheel heater is not working, DTC B145504 is stored in the steering column control module.
A0120482058767_12020-04-02. Service bulletin. ENGINE AND ENGINE COOLING:COOLING SYSTEM. This bulletin contains instructions for DTCs P218100, P017B00, P308100, and P01E400.
A0120462014753102020-04-02. Service bulletin. FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS. This bulletin contains instructions for when to add gasoline additives for cleaning the injectors.
SM 14-20202020-04-02. Service bulletin. EQUIPMENT. This special notice is to inform dealers to return the parts listed and order the superseded part number going forward
19AUUSMaint03202020-04-02. Service bulletin. ENGINE. Standard Maintenance Section - Added A6 (all models) & A7 (all models) to "Plenum Chamber and water drain valves: Check for Dirt."
A9120392018187112020-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This bulletin contains inspection guidelines for radio interference that causes noises in the speaker.
A9120402056076_72020-03-05. Service bulletin. EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for when there is no diagnostics communication with the ConBox.
A9120372057052_22020-03-05. Service bulletin. EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM(GLOBAL POSITIONING SYSTEM). This bulletin contains instructions for when the MMI shows the message 'Read error occurred when accessing the navigation data' after initialization and reboots constantly with DTC B126CF0 and/or B126CF1.
A8720032055257_52020-03-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. This bulletin contains repair instructions for when the HVAC system is having issues with air flow and temperature commands with DTCs B11AF07 and B109207.

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