2021 Audi A4 Technical Service Bulletins

1,057 technical service bulletins (TSBs) are on record for the 2021 Audi A4. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10186569Jan 25, 2021Brakes. This bulletin contains technical information regarding when the parking aid sporadically warns of obstacles that don't exist or it is inoperative/constant warning.
• 10186565Jan 19, 2021Equipment. This bulletin states to ignore DTCs U156C00, B1A06F1, B1A06F2 and to not perform any repairs or run any test plans for these ghost DTCs.
• 10186590Jan 18, 2021Equipment. This special notice is to inform dealers to return the parts listed if it meets the criteria provided.
• 10185651Jan 13, 2021Equipment, Engine cooling. This bulletin contains instructions for when there may be a noise from the exhaust flap or there are DTCs sporadically stored in the ECM.
• 10185672Jan 12, 2021Body and structure. This informational bulletin outlines proper warranty procedure for optical defects.
• 10185664Jan 12, 2021Electrical system, Equipment. This bulletin contains repair instruction for when DTC C110DF0 is stored and the yellow steering lamp is on.
• 10185680Jan 8, 2021Electrical system, Seats. This bulletin contains a software update that addresses the sporadic issue where the front seats move into an implausible position.
• 10185274Dec 18, 2020Electrical system, Seats. This bulletin contains a software update that addresses the sporadic issue where the front seats move into an implausible position.
• 10185232Dec 18, 2020Engine, Equipment. This bulletin contains instructions for addressing discoloration due to moisture on a new vehicle.
• 10185155Dec 18, 2020Equipment. This special notice is to inform dealers to return the part numbers listed (State of California only).
• 10185256Dec 17, 2020Equipment, Electrical system. This bulletin contains repair instructions for when cables are hanging in view with no DTCs.
• 10185228Dec 17, 2020Transmission and drivetrain. This bulletin contains repair instructions for resolving a leak on the transmission case.
• 10185221Dec 10, 2020Equipment, Electrical system. This informational bulletin contains instructions for Audi connect before performing any MMI work.
• 10185283Dec 9, 2020Equipment. SOS emergency call malfunction, DTC B129B11 and B129C11 are stored in the emergency call control module
• 10185230Dec 7, 2020Electrical system. This bulletin contains instructions for when DTC U101300 is logged with sports differential warning lamps or messages.
• 10185210Dec 2, 2020Electrical system. Infotainment Section: ADDED: Check radio settings and ensure 'Online additional data' is toggled on and 'online station tracking' is set to Automatic
• 10183484Nov 24, 2020Engine cooling. This bulletin covers Audi connect: oil level in the myAudi app is implausible
• 10183457Nov 18, 2020Brakes, Equipment. This bulletin contains instructions for addressing an ABS warning light with DTCs C050200 and/or C050800.
• 10183468Nov 17, 2020Equipment, Electrical system. This informational bulletin contains information regarding connectivity issues.
• 10183456Nov 17, 2020Brakes, Equipment. This bulletin contains instructions for addressing a brake pad wear indicator light with no DTCs.
• 10182488Nov 6, 2020Electrical system. This bulletin contains instructions regarding Audi connect software failures and how to resolve it.
• 10182479Nov 4, 2020Equipment. Added Saga Part number for 0W40 oil: SAGA Part: G E55040S0
• 10182072Oct 29, 2020Equipment, Electrical system. Driver Assistance Section: ADDED: "Activate rear cross traffic assist (if equipped)"
• 10182070Oct 27, 2020Electrical system. This bulletin contains ODIS instructions for DTC B200096 or B200000 with an SOS malfunction warning displayed in the instrument cluster.
• 10181981Oct 27, 2020Steering. This bulletin contains repair instructions for when DTC B145504 with symptom code 7340800.
• 10182046Oct 26, 2020Electrical system, Equipment. This bulletin contains a guide for troubleshooting HD radio issues.
• 10181434Oct 15, 2020Equipment, Electrical system. This bulletin explains and troubleshoots when Audi connect does not have a green SOS light.
• 10181058Oct 8, 2020Engine, Body and structure. 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.
• 10181185Oct 7, 2020Electrical system, Equipment. This informational bulletin directs you to read the SSP and not perform any repairs for the concern.
• 10181056Oct 7, 2020Engine cooling, Equipment. This bulletin contains information for diagnosing the Start/Stop system.
• 10181370Oct 6, 2020Equipment. This informational bulletin explains a technical change to the vehicle.
• 10181059Oct 5, 2020Engine cooling, Equipment. This bulletin contains instructions for using the UV additive to find engine oil leaks.
• 10180476Sep 30, 2020Tires. Addition of RS 6 Avant
• 10180475Sep 24, 2020Tires. Addition of A4, S4, A4 allroad, A5, S5, RS 5, A6 allroad, S6, A8 L, A8 L TFSI e, S8 L, e-tron, Q8, SQ8, RS Q8
• 10180155Sep 24, 2020Wheels, Equipment, Tires. Added new graphic to reflect where to find MY 21 information
• 10180343Sep 23, 2020Equipment. New Document
• 10180147Sep 17, 2020Electrical system, Body and structure, Equipment. This bulletin contains instructions for addressing the issue when the parking assist will intermittently alert the customer to an obstruction and the sensors look 'pushed in'.
• 10180136Sep 15, 2020Electrical system, Engine. This informational bulletin directs you to read the SSP and not perform any repairs for the concern.
• 10180046Sep 8, 2020Equipment. Vehicle Preparation Section: ADDED: "FCC ID, and Model" to" Verify Audi phone box customer registration form is present in vehicle and add the serial number, FCC ID, and Model from Elsa (if equipped). See TSB 2051720" Media / Radio / SAT Section: ADDED: "Confirm SiriusXM is on and in an active state (can scroll through channels and hear music)" ADDED Phone Box Form to the end of the document
• 10180045Sep 8, 2020Equipment. Infotainment Section: ADDED: - Tune to SiriusXM and show SiriusXM presets and customize based on customers listening preferences - Show differences of SAT vs IP channels through the On Demand category in SiriusXM with 360L equipped vehicles
• 10180144Sep 3, 2020Equipment. This informational bulletin contains instructions about updating the navigation map.
• 10179048Aug 31, 2020Engine cooling, Equipment. This bulletin contains instructions for when there may be a noise from the exhaust flap or there are DTCs sporadically stored in the ECM.
• 10179112Aug 27, 2020Engine cooling, Equipment. This information bulletin contains a background on the outside air temperature reading.
• 10178563Aug 13, 2020Electrical system, Equipment. This bulletin contains information regarding the replacement of PODs components.
• 10178590Aug 11, 2020Electrical system. This informational bulletin contains instructions for when a non-plus sized iPhone heats up while wirelessly charging and the CarPlay screen may appear frozen.
• 10178548Aug 10, 2020Equipment. Recall Reminder Part Labels
• 10178559Aug 4, 2020Equipment, Engine. New document
• 10177753Jul 27, 2020Electrical system. Vehicle Preparation Section: REMOVED: "Perform TSB 2058096/1 '91 Audi connect has no function, SOS LED is off, and SOS warning message in FPK' Perform MMI Menu Reset: 5F-Information Electronics >> Guided Functions >> Basic Settings >> Reset MMI Menu Settings Deactivate privacy mode: Main Menu >> Privacy >> Activate Privacy Settings (Turn off) Turn Vehicle Off and allow Bus Sleep Cycle
• 10177884Jul 20, 2020Equipment, Suspension. This bulletin contains instructions for correcting buffer stop noise (rumbling or squeaking from the front end).
• 10177409Jul 15, 2020Suspension, Steering. The bulletin contains diagnosis information for noises on the front end of the vehicle. Potential rolling sounds.

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