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Service bulletins for the 2018 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.

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

By type

By component

By trouble code

By topic

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
A5023122062633_22023-04-06. Service bulletin. SERVICE BRAKES; SUSPENSION. This bulletin provides instruction for when there are noises heard during steering or braking maneuvers.
A4623412034181232023-03-06. Service bulletin. SERVICE BRAKES. This bulletin provides instructions for brake noise analysis and handling.
A4622342034181222022-09-01. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise.
A4722162055646_42022-09-01. Service bulletin. SERVICE BRAKES; ENGINE AND ENGINE COOLING. This bulletin contains repair instructions for when the vehicle sporadically does not start and there is a hard brake pedal concern.
A4722122055646_32022-07-01. Service bulletin. SERVICE BRAKES. This bulletin contains repair instructions for when the vehicle sporadically does not start and there is a hard brake pedal concern.
A4622322034181212022-07-01. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise.
A4622302034181202022-05-05. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise.
A4622262022584112022-02-04. Service bulletin. SERVICE BRAKES. This informational bulletin provides diagnostic information for brake conditions.
A4622272034181192022-02-04. Service bulletin. EQUIPMENT; SERVICE BRAKES; EQUIPMENT ADAPTIVE/MOBILITY. This technical service bulletin provides troubleshooting for brake noise.
A9021032058077_52021-06-03. Service bulletin. EQUIPMENT; SERVICE BRAKES. This bulletin contains instructions for determining unexpected Audi presense interventions.
A4721082055646_22021-03-04. Service bulletin. SERVICE BRAKES. This bulletin contains repair instructions for when the vehicle sporadically does not start and there is a hard brake pedal concern.
A4621252054385_22021-03-04. Service bulletin. EQUIPMENT; SERVICE BRAKES. This informational contains an explanation for when the customer hears creaking noises when braking at almost standstill (crawling when pulling away or briefly before standstill).
A4621242034181182021-03-04. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise.
A4621232022584102021-03-04. Service bulletin. SERVICE BRAKES. This informational bulletin provides diagnostic information for brake conditions.
A9121642024323_72021-02-04. Service bulletin. PARKING BRAKE:ELECTRICAL:CONTROL MODULE. This bulletin contains technical information regarding when the parking aid sporadically warns of obstacles that don't exist or it is inoperative/constant warning.
A4620192061331_12020-12-04. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for addressing an ABS warning light with DTCs C050200 and/or C050800.
A4620182061403_12020-12-04. Service bulletin. SERVICE BRAKES, AIR:DISC:PADS; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This bulletin contains instructions for addressing a brake pad wear indicator light with no DTCs.
A9020362058077_22020-02-08. Service bulletin. SERVICE BRAKES; EQUIPMENT. This bulletin contains instructions for determining unexpected Audi pre sense interventions.

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