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Service bulletins for the 2011 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.

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

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Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
A9021032058077_52021-06-03. Service bulletin. EQUIPMENT; SERVICE BRAKES. This bulletin contains instructions for determining unexpected Audi presense interventions.
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.
A4615172027636-12018-02-05. Service bulletin. SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 15-11 dated June 29, 2015. Customer may complain about brake squeak or squeal with light to moderate pedal pressure from front brakes.
A461486 2022584-2018-02-05. Service bulletin. SUSPENSION; AIR BAGS; SERVICE BRAKES, HYDRAULIC. Brake-related vibration and pulsation has several causes that depend on driving style and resulting brake disc temperature, as well as environmental conditions. Both the intensity of the wear of the brake system and the type of wear depend on the operating conditions of the vehicle. The wear of the brake discs is determined by the frequency and intensity of the brake operations. Dirt build-up, exposure to sand, long standing times, and road salt or similar, can also promote wear as well as cause scoring marks on the brake discs. The driving style of the driver also influences the wear of the brake system. An overly-aggressive driving style, which results in frequent sharp braking, can lead to more wear (particularly of the brake pads). A gentle driving style can result in very light brake applications. If the brakes are always applied with little pressure, a rust film and other airborne particles may settle on the brake discs and pads. Firm brake operations can help clean off such build-up from the brakes.
A461347 2034387-2017-12-05. Service bulletin. ELECTRICAL SYSTEM; PARKING BRAKE. Customer may report sporadically hearing the parking brake being actuated after the vehicle has been switched off. If the customer does not identify the sound as the sound of the parking brake being actuated, he or she may simply complain of hearing noises from the rear brakes. Ignition is switched off. Steering is locked. Park is selected. Parking brake is not engaged. If the electro-mechanical parking brake is not operated for some time, the free play between brake pads and brake discs increases because of normal brake pad wear. The parking brake control unit performs an automatic correction about every 621 miles (1,000 km). On A8 models, the brake pad thickness is also calculated.
A461330 2027636-2017-11-17. Service bulletin. SERVICE BRAKES. Supersedes Technical Service Bulletin Group 46 number 12-22 dated June 5, 2012. Brakes squeak or squeal when braking with light to moderate force on vehicles produced before June 20, 2011 (calendar week 25 of 2011).
A461521 2027636-2017-11-17. Service bulletin. SERVICE BRAKES. Supersedes Technical Service Bulletin Group 46 number 15-17 dated July 14, 2015. Customer may complain about brake squeak or squeal with light to moderate pedal pressure.
A461525 2022584-2017-11-17. Service bulletin. STEERING: STEERING WHEEL/HANDLE BAR; SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 14-86 dated July 14, 2014. DO NOT use this TSB if there is another TSB for same concern applicable to the VIN. This TSB is only intended for diagnostic purposes and does not serve as a guideline for determining warrantable conditions. Customer may report that the steering wheel vibrates or pulsates when the brakes are applied. driving style, environmental conditions, and service history of the vehicle. Additionally, as brake pads and discs wear, their dampening ability is reduced. Disc thickness variation (DTV) is a common condition that contributes to brake pulsation. DTV occurs when the two braking surfaces of the brake disc are no longer parallel to each other. This condition cannot be accurately measured with normal workshop tools.
A461341 2027636-2017-11-17. Service bulletin. SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 13-30 dated March 13, 2013. Brakes on vehicles produced before September 3, 2012 (calendar week 36 of 2012), squeak or squeal when used with light to moderate force.
Fluid Cap Chart2017-11-08. Service bulletin. ENGINE AND ENGINE COOLING; STEERING; SERVICE BRAKES; ENGINE; VISIBILITY:WINDSHIELD; POWER TRAIN. This document contains the fluid capacty chart.
A461489 2027636-2017-11-08. Service bulletin. SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 14-73 dated March 12, 2014. Brakes squeak or squeal when used with light to moderate force. The vehicle was produced before September 3, 2012 (calendar week 36). This bulletin does not apply to vehicles produced on September 3, 2012 or later. For vehicles built on September 3, 2012 or later, use TSB 2034181: 46 Brake noise analysis and handling, or other applicable TSBs.
A461473 2027636-2017-11-08. Service bulletin. SERVICE BRAKES. Supersedes Technical Service Bulletin Group 46 number 13-41 dated June 11, 2013. Brakes on vehicles produced before September 3, 2012 (calendar week 36 of 2012), squeak or squeal when used with light to moderate force.
A461466 2022584-2017-11-08. Service bulletin. STEERING; WHEELS; SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 12-23 dated June 18, 2012. Customer may report that the steering wheel vibrates or pulsates when the brakes are applied. Document contains the brake pulsation diagnostic guidelines.
Executive Servic2017-10-27. Service bulletin. POWER TRAIN; STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; POWER TRAIN:MANUAL TRANSMISSION; ENGINE AND ENGINE COOLING; SERVICE BRAKES, HYDRAULIC:FLUID. This document contains a fluid capacity chart as well as a chart that contains the parts and part numbers needed for service.
A461511 2027636-2017-10-27. Service bulletin. SERVICE BRAKES, HYDRAULIC. Supersedes Technical Service Bulletin Group 46 number 14-89 dated July 21, 2014. Customer may complain about brake squeak or squeal with light to moderate pedal pressure. If front brake discs or brake pads are close to their wear limit, foreign objects between brake disc and brake pad, such as small stones, grit, rust build-up, or sand, un-ground or corroded friction materials, or metallic deposits from disc material in brake pad exists, then this TSB does not apply.
A4616532027636152017-03-10. Service bulletin. SERVICE BRAKES; SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. THIS BULLETIN PROVIDES TROUBLESHOOTING AND A SOLUTION FOR BRAKE SQUEAK OR SQUEAL WITH LIGHT OR MODERATE PEDAL PRESSURE.
A4616342027636132017-03-03. Service bulletin. SERVICE BRAKES. THIS TECHNICAL SERVICE BULLETIN INFORMS THE READER TO DIAGNOISE THE BRAKE NOISE ISSUE THEN REPLACE THE BRAKE PADS.
A4616442027636142017-02-15. Service bulletin. SERVICE BRAKES. THIS TECHNICAL SERVICE BULLETIN PROVIDES TROUBLESHOOTING FOR A BRAKE SQUEAL SOUND FROM THE FRONT BRAKES.
A4616442027636142017-02-11. Service bulletin. SERVICE BRAKES. THIS TECHNICAL SERVICE BULLETIN PROVIDES TROUBLESHOOTING FOR A BRAKE SQUEAL SOUND FROM THE FRONT BRAKES.
2027636/72016-05-23. Service bulletin. SERVICE BRAKES. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
2027636/62016-05-23. Service bulletin. SERVICE BRAKES. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
2027636/52016-05-23. Service bulletin. SERVICE BRAKES. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
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.