Service bulletins for the 2009 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.
775 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| A961368 2029384- | 2017-12-05. Service bulletin. EQUIPMENT:ELECTRICAL. Supersedes Technical Service Bulletin Group 96 number 13-64 dated June 20, 2013. The customer is able to program one or more of the Homelink buttons using their garage door remote, but after a few days or weeks, one or more of the programmed Homelink buttons no longer functions. The LED on the Homelink button that is no longer functioning now flashes slowly, indicating that no programming is stored. The customer's transmitter operates at 295Mhz. No DTCs are stored in any control units. At the workshop, the Homelink system can be programmed to the workshop garage door successfully. No trouble is found. The garage door opener control module, J530, was designed with an operational frequency range in which the 295Mhz frequency works correctly during the initial programming of the system. Over time, the transmitting frequency can drift out of range (especially in warmer climates), causing the system to lose its programming. |
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| A911392 2030947- | 2017-12-05. Service bulletin. EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE. Supersedes Technical Service Bulletin Group 91 number 12-61 dated September 25, 2012. The customer complains that when he or she is trying to place a phone call from the vehicle while using a Bluetooth®-connected phone, the phone call disconnects before it begins and an error shows on the MMI display. The message may be "Function not supported" or "Network error". The customer is using a phone with the Android operating system. In addition, Skype®, or another network-based communication software, is installed on the phone. Call can be placed directly from the phone without a problem. When the phone gets the request to place a call from the vehicle, a prompt appears on the phone asking the user to choose how the call should be placed. If the prompt is ignored, the MMI system disconnects the call assuming the phone is not responding. |
| A911388 2021780- | 2017-12-05. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. Supersedes Technical Service Bulletin Group 91 number 10-70 dated October 26, 2010. Sequence of error messages are seen on the radio display screen after a CD was loaded into or removed from the internal CD drive. "Drive defective. The error could be corrected by resetting it (see radio system owner's manual). Otherwise, contact your Audi dealer." "The CD-drive is damaged and was therefore deactivated." The CD drive cannot be selected in the Source list and is described as "damaged." After the ignition is cycled or a radio reset performed, the CD drive is fully operational. DTC 00468 (CD-ROM Drive -R92- Faulty) is stored in the radio (address word 56). The DTC will be sporadic if the ignition has been cycled or a radio reset performed and will automatically be cleared after 40 ignition cycles without a reoccurrence. Only vehicles with the CAN-based generation 3 radio (Concert (PR 8UQ) or Symphony (PR 8YN)) are affected. |
| A871343 2020124- | 2017-12-05. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. Supersedes Technical Service Bulletin Group 87 number 13-42 dated June 11, 2013. Air conditioning is inoperative. The HVAC blower functions normally. Battery discharged; however, when charged, there is no bus silence when vehicle ignition is off. The A/C pressure/temperature sensor, G395, leaks refrigerant. This causes sensor G395 to show an incorrect or implausible value when reading MVBs. An incorrect signal or a low refrigerant level in the system can cause the air conditioning compressor to deactivate. The LIN cable connecting the vehicle electrical system control module, J519, to sensor G395 is pinched or cut. This affects the A4/S4, A5/S5 Coupe and Cabriolet, and Audi Q5 vehicles. The A6 and A8 are not affected by this type of failure. The pressure sensor G395/G65 sends an incorrect signal that prevents bus silence and the battery is discharged. Sensor G395 is a LIN slave of the vehicle electrical system control module. The vehicle electrical system control module transfers the information provided by the sensor via the comfort data bus to the climate control module, J255. |
| A551332 2023967- | 2017-12-05. Service bulletin. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD; LATCHES/LOCKS/LINKAGES:HOOD:LATCH. Supersedes Technical Service Bulletin Group 55 number 13-30 dated May 28, 2013. "Low Oil Level" message is on in the DIS or MMI. The hood must be open for at least 30 seconds for a reset of this message to be performed. The message is not reset in the DIS/MMI because the hood has not been recognized as being opened due to an inoperative hood contact switch. |
| A481346 2021191- | 2017-12-05. Service bulletin. STEERING. Supersedes Technical Service Bulletin Group 40 number 09-06 dated August 3, 2009. Customer hears squeaking noises when turning or maneuvering the steering wheel. The folds of the outer CV joint rubber boots can touch each other when the steering wheel is turned. |
| A481345 2034351- | 2017-12-05. Service bulletin. STEERING. Customer may report hearing creaking or squeaking noise from the steering column when steering slowly (the noise can be duplicated while the vehicle is stationary if the steering wheel is turned slowly). The noise may get louder at higher temperatures or when the vehicle is driven for a longer period of time. The noise comes from the sealing sleeve/steering column opening on the bulkhead. Listen to the attached audio file for example of the noise. Insufficient lubrication of the intermediate steering shaft in the area of the sealing sleeve. |
| A461351 2033674- | 2017-12-05. Service bulletin. SERVICE BRAKES. Supersedes Technical Service Bulletin Group 46 number 13-46 dated June 27, 2013. Brakes on vehicles produced before September 3, 2012 (calendar week 36 of 2012), squeak or squeal when used with light to moderate force. |
| 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. |
| A371309 2028715- | 2017-12-05. Service bulletin. POWER TRAIN. Supersedes Technical Service Bulletin Group 37 number 12-40 dated February 28, 2012. Rough gear changes, both when accelerating and when slowing down. There is a rough driving power disruption that occurs sporadically and lasts for less than a second. After a mechatronics, torque converter, or complete gearbox replacement, the clutches must be adapted to the new component. This requires a gradual move of the clutch linings toward the optimal operating points in the most diverse load conditions. As a result, sporadic driving power disruptions lasting for less than a second or reduced shift comfort are possible over the first 500 miles. This is normal, and these issues will decrease over time. The issues can also occur if the adaptation values of the gearbox were deleted. |
| A211316 2031245- | 2017-12-05. Service bulletin. ENGINE; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-14 dated June 7, 2013. MIL on. DTC P029900 (Negative Pressure Deviation) is stored as a static fault in the engine control module (ECM), J623 (address word 01). Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P029900 (Negative Pressure Deviation). |
| A191344 2033491- | 2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 13-42 dated July 11, 2013. Customer may report coolant leaking from the engine area. The leak can be traced to the connection of the water pump and the hose leading to the heater core. The seal ring is not the cause of the leak. |
| A191342 2033491- | 2017-12-05. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 19 number 13-40 dated June 17, 2013. Customer may report coolant leaking from the engine area. The leak can be traced to the connection of the water pump and the hose leading to the heater core. The seal ring is not the cause of the leak. |
| A941306 2017806- | 2017-11-17. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Supersedes Technical Service Bulletin Group 94 number 12-79 dated June 6, 2012. Light bulb warning light and the message Vehicle lights: malfunction is displayed in the instrument cluster display. DTC 03280 (Light switch position implausible signal) is stored in the vehicle electrical system control module, J519 (09). Exterior lights are functioning properly. If the headlight switch is moved to an intermediate position and remains there, the light bulb warning light and the error message appear after approximately ten seconds. Once displayed, the message turns off after approximately five seconds. The light bulb warning light turns off only after the headlight switch is turned to a defined position, and the status of DTC 03280 is changed to sporadic. After 40 driving cycles without an implausible signal detected, the DTC is automatically cleared. |
| A911374 2024323- | 2017-11-17. Service bulletin. BACK OVER PREVENTION: CAMERA SYSTEM. Supersedes Technical Service Bulletin Group 91 number 12-61 dated October 1, 2012. Parking aid sporadically warns of obstacles when none exist. Parking aid is inoperative or provides constant warning. Various parking aid sensor fitting issues. Environmental conditions. |
| A571383 2021363- | 2017-11-17. Service bulletin. LATCHES/LOCKS/LINKAGES; EQUIPMENT:ELECTRICAL. Supersedes Technical Service Bulletin Group 57 number 11-48 dated July 25, 2011. Vehicle doors cannot be locked or unlocked using Advanced key. Vehicle cannot be started using the Start-Stop button. In Access/Start Authorization Control Module J518 (address word 05), DTC 03283 (Driver's side Access/Start Authorization Antenna Short Circuit to Ground), DTC 03284 (Right Access/Start Authorization Antenna Short Circuit to Ground) or DTC 00183 (Interior Access/Start Authorization Antenna 1 -R138-) are stored. Vehicle keys function properly otherwise, operating the door locks via the remote control as well as starting the vehicle using the ignition switch. |
| A571382 2017082- | 2017-11-17. Service bulletin. LATCHES/LOCKS/LINKAGES; EQUIPMENT:ELECTRICAL. Supersedes Technical Service Bulletin Group 57 number 11-55 dated August 22, 2011. Central locking via remote control does not work either sporadically or permanently. The locks can still be operated manually. Missing synchronization between the remote control key and vehicle because the battery has been disconnected or the battery of the remote control has been replaced. If other senders operate in the same frequency range (mobile phones, TV stations, wireless headphones, baby monitors, other vehicle remote controls, etc.), the remote control key may have been temporarily switched off because a clear identification of the remote control key is not possible. This is necessary to prevent an unintentional unlocking of the vehicle by other unrelated senders. |
| A551327 2023967- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 55 number 12-24 dated August 7, 2012. "Low Oil Level" message is on in the DIS or MMI. The hood must be open for at least 30 seconds for a reset of this message to be performed. The message is not reset in the DIS/MMI because the hood has not been recognized as being opened due to an inoperative hood contact switch. |
| A441336 2022563- | 2017-11-17. Service bulletin. SUSPENSION. Supersedes Technical Service Bulletin Group 44 number 13-35 dated January 18, 2013. Customer feels vibration from 55 - 80 mph (88 - 128 km/h) in the seat, vehicle floor, footwell, pedals, or steering wheel. This condition does not result in any handling concerns or loss of vehicle control. |
| A011369 2028344- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING. Supersedes Technical Service Bulletin Group 01 number 12-57 dated October 29, 2012. Noises/inconsistent engine operation after cold start during the catalyst heating phase. The customer may interpret this engine roughness as misfiring. To comply with the legal requirements on exhaust gas emissions according to the LEV-1 and LEV-2 standards, a high exhaust gas quality must be ensured. The necessary catalyst only operates at a temperature over 300°C (572°F). To achieve this, the catalyst is heated up. The catalyst heating phase is achieved by a late ignition angles and by introducing additional fresh air to the exhaust valves (secondary air system). Late ignition angles make sure that the exhaust gas from the cylinders has a higher temperature. This exhaust gas includes fuel that is un-burnt, and was deliberately injected into great quantities. The secondary air system adds fresh air to the exhaust gas as it leaves the cylinder and the extra fuel is burnt. As a result, the temperatures of the exhaust gas and of the catalyst increase quickly. The afterburning in the exhaust manifold before the catalyst changes the sound characteristic of the engine. This heating-up of the catalyst, including afterburning, is normal and has no effect on the service life of the engine. During this catalyst heating phase, the engine has increased idle speed, may have increased vibrations, and has a different sound characteristic. Depending on conditions, the time of the catalyst heating phase varies. |
| A851316 2033596- | 2017-11-17. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. The fresh air blower is inoperative. DTCs may be stored in the heating and air conditioning electronics control module (address word 08). Malfunctions of the fresh air blower could be caused by a faulty printed circuit board in the fresh air blower control module and the carbon brushes bind in the brush holder and, as a consequence, lose contact with the motor commutator of the fresh air blower. |
| A281321 2017555- | 2017-11-17. Service bulletin. EQUIPMENT:ELECTRICAL. Supersedes Technical Service Bulletin Group 28 number 12-19 dated May 1, 2012. The master key with remote control does not engage or stay in the ignition lock. On vehicles without Advanced Key, the remote keys are inoperable. Keyless unlocking/locking using the door handle and keyless opening of the trunk lid using the trunk handle are inoperable. The vehicle cannot be started with the Start/Stop button. The remote keys are inoperable. The message "ignition lock faulty" may appear in the instrument cluster driver information display. DTC 00166 (Access/Start Authorization Switch -E415- Incorrect Signal) may be stored in Comfort System Central Control Module J393 (address word 46). It is possible that objects have been inserted into the ignition lock, which causes the slide of the ignition lock to become stuck in the rear part of the lock (S-contact position). The stuck slide is not allowed to return to the starting point (0-position). |
| A211313 2031245- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-12 dated April 1, 2013. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation). |
| A211312 2031245- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 13-11 dated March 6, 2013. MIL on, DTC P0299 (Negative Pressure Deviation) is stored. Turbocharger waste gate flap has play. Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation). |
| A191336 2033491- | 2017-11-17. Service bulletin. ENGINE AND ENGINE COOLING. Customer may report coolant leaking from the engine area. The leak can be traced to the connection of the water pump and the hose leading to the heater core. The seal ring is not the cause of the leak. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.