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Service bulletins for the 2009 Audi S4

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.

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

By type

By component

By trouble code

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
451307203341222024-03-04. Service bulletin. SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. ABS warning light on with additional warning lights on (EPB/TPMS/EPC/MIL) - Wire harness damage
461486202258452024-03-04. Service bulletin. SERVICE BRAKES. Brake pulsation diagnostic guidelines
A4623432069904_12023-05-05. Service bulletin. SERVICE BRAKES; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; UNKNOWN OR OTHER. This bulletin provides information for when there are noises when braking, and the brake pad thickness is OK.
A4622342034181222022-09-01. Service bulletin. SERVICE BRAKES. This technical service bulletin provides troubleshooting for brake noise.
37 13 07 20336582022-05-02. Service bulletin. SERVICE BRAKES. This condition may be caused when the brake pedal and the accelerator pedal are depressed simultaneously. Drivers who consciously or unconsciously drive with their left foot resting on the brake pedal are prone to experience this condition. With the introduction of Electronic Power Control (EPC) (no accelerator cable) to fuel injection systems, an engine RPM control feature has been incorporated into the engine electronic control system software. As a result, application of the brake and accelerator pedals at the same time (brake pedal with left foot and accelerator pedal with right foot) results in the following: ? Brake pedal function (normal at all times) overrides any throttle application. ? Diagnostic Trouble Codes (DTCs) will not be stored. ? When the brake pedal is applied while the accelerator is depressed, engine RPMs will return to idle speeds of 1400 RPMs after approximately two seconds. ? When the accelerator is applied while the brake pedal is depressed, the vehicle accelerates slower than usual (reduced engine torque).
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).
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.
TSB-45-13-072014-03-06. Service bulletin. SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:ABS WARNING LIGHT; SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT. AUDI: DUE TO DAMAGE ABS WHEEL SPEED SENSOR DURING PRODUCTION, SOME VEHICLES MAY EXPERIENCE STEERING WHEEL NOT LOCKING, IGNITION KEY CANNOT BE REMOVED, AND OTHER VARIOUS ISSUES. MODEL 2009-2014 A4/S4, A5/S5, A5/S5 CAB, Q5. *PE UPDATED 05/21/2014 *JS

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