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Service bulletins for the 2021 Audi A4 allroad

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.

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

By type

By component

By trouble code

Bulletins, newest first
TSB_2061461_132025-07-08. Service bulletin. POWER TRAIN. This bulletin provides information when the starter/generator drive belt is noisy or came off.
TSB_2042920_22025-07-08. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when there is corrosion on the exhaust tail pipes.
TSB_2059528_152025-07-08. Service bulletin. UNKNOWN OR OTHER. This bulletin provides information when, with ConBox High, the Emergency call (SOS) fault/LED is red, with DTC B200000.
TSB_2061461_122025-07-08. Service bulletin. POWER TRAIN. This bulletin provides information when the starter/generator drive belt is noisy or came off.
TSB_2074855_32025-07-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the calendar function is not available.
TSB_2069331_52025-07-08. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when thre is a warning in the instrument cluster: "Instrument cluster: fault. Limited warning messages. Please contact workshop"; B200096.
TSB_2060855_32025-07-08. Service bulletin. SUSPENSION. This bulletin provides information when there are rumbling noises from the suspension - upper link rubber mounting.
TSB_2076404_42025-06-03. Service bulletin. UNKNOWN OR OTHER. This bulletin provides a deployment overview for customer service packages MLB and MQB for MIB3/connectivity box/OCU3/LSR.
TSB_2075681_32025-06-03. Service bulletin. POWER TRAIN. This bulletin provides informaoitn when there is droning noises/vibrations in tight corneres, in vehicles that have quattro with ultra technology.
TSB_2074806_32025-06-03. Service bulletin. STRUCTURE:BODY. This bulletin provides information when there are noises after selecting a gear while the vehicle is idling and stationary, or while driving.
TSB_2073867_22025-06-03. Service bulletin. ENGINE. This bulletin provides information when DTC U14A00 Terminal 30 is stored in the ECM.
TSB_2065960_52025-06-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the display of the Audi virtual cockpit is distorted due to a broken screen.
TSB_2061904_72025-06-03. Service bulletin. STEERING. This TSB provides information when the warning message "Steering lock for active steering failed" appears.
TSB_2059891_92025-06-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the restricted function icon for Audi pre sense is displayed after engine starts.
TSB_2056019_42025-06-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the anti-theft alarm activates for no reason, or when the anti-theft alarm does not activate.
TSB_2055443_22025-06-03. Service bulletin. STRUCTURE:BODY. This bulletin provides accounting instructions for noises from the headliner/noises from the panoramic sunroof.
AVIN4APIN202504282025-05-03. Other. UNKNOWN OR OTHER. Summary of all Vin4Pin topic in May Cylinder head cover bolts leaking Airbaglight on DTC B12251B Steering column switch trim dislodged MIB3 system takes a long time to load at startup Quattro ultra binding Front or rear window not closing correctly/reverse direction Sunroof shade binds
TSB_2060523_42025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides MIB3 Software update instructions.
TSB_2077631_12025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when the message "Engine/power nt start system: fault. Please contact workshop" appears; DTC B143C29.
TSB_2077320_22025-05-03. Service bulletin. UNKNOWN OR OTHER. This TSB is a label placement guide as required by CARB for remanufactured parts.
TSB_2031473_62025-05-03. Service bulletin. STRUCTURE:BODY. This service information TSB describes a cosmetic issue after using a car wash.
TSB_2073582_22025-05-03. Service bulletin. UNKNOWN OR OTHER. Apple CarPlay: general troubleshooting for connection complaints.
TSB_2071928_22025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides informatio when, in MIB3, the MMI sidebar is missing.
TSB_2071281_32025-05-03. Service bulletin. ELECTRICAL SYSTEM. This TSB provides information when the warning "Fault: Limited warning messages" appears in the virtual cockpit; DTC B174404.
TSB_2012749_182025-05-03. Service bulletin. ELECTRICAL SYSTEM. This bulletin provides information when the exterior lights have moisture accumulation.

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