2021 Audi Q5: engine stalls while driving

Filed Aug 20, 2026 · Electrical, Transmission · TX

On 8/3/26, my 2021 Audi Q5 began throwing numerous different malfunction/error alerts and the engine turned off while driving after a bottle of water had partially spilled onto our backseat behind the drivers side. The vehicle was towed to a nearby mechanic who determined that liquid damaged the gateway control module located under the backseat of the vehicle, as the gateway control module is placed in a "protective cover" (an unsealed plastic bag) and that bag visibly had liquid inside of it. We had immediately contacted Audi upon learning of this issue and decided not to move forward with any repairs, but to instead pay out of pocket to have it towed 70 miles to Audi/where we originally purchased the vehicle. This "protective cover" the control module was placed inside was completed as a recall service repair on our vehicle in April of 2022 due to a the federal safety agency recall announced in December 2021 regarding safety issues in these control modules failing from liquid spills on the backseat. We contacted Audi, explained that liquid had spilled in our backseat and entered the "protective cover" and damaged the control module. They agreed to inspect our vehicle to determine if the "protective cover" had been insufficiently installed. We paid out of pocket to have it towed to the dealership where it took them 6 days to determine the gateway control module is damaged (we had already explained this to them). Although liquid was found in the "protective cover" of this gateway control module, the dealership claims it was installed sufficiently. Upon looking into this matter further, there are numerous complaints of this exact issue (water entering and damaging the gateway control module from a liquid spill on the backseat, even with the "protective cover") on the federal safety agency website, as well as a previous class action lawsuit settled out of court in regards to this EXACT issue. THE PRIOR RECALL REPAIR DOES NOT FIX THE SAFETY HAZARD AS STATED IN THE OFFICIAL the federal safety agency RECALL REPORT.

Filed Jun 22, 2026 · Engine · 43,000 miles · TX

The contact owns a 2021 Audi Q5. The contact stated that while driving approximately 55 MPH, the vehicle lost motive power and the vehicle decelerated before the vehicle stalled. During the failure, the check engine, oil, and coolant warning lights were illuminated. The vehicle was later towed to the local dealer to be diagnosed. The dealer determined that the engine bearings had failed, causing catastrophic damage to the engine. The contact was advised that the engine needed to be replaced. The vehicle was not yet repaired. The contact was informed that the VIN was not included in the federal safety agency Campaign Number: 22V753000 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 43,000.

Filed Feb 24, 2026 · Body, Electrical · 37,200 miles · MI

The contact owns a 2021 Audi Q5. The contact stated that while driving at an undisclosed speed, several unknown warning lights illuminated, and the vehicle stalled. Additionally, the windows independently rolled up and down, and the engine seized. While attempting to start the vehicle, the vehicle failed to start. The contact stated that the failure had occurred three times within five days. The vehicle was towed to the dealer where it was purchased. The failure was diagnosed with a failed gateway control module. The contact was informed that the gateway control module needed to be replaced. The vehicle was being repaired. The contact was informed that the plastic protective bag that covered the gateway control module was filled with water. In addition, the dealer informed the contact that the federal safety agency Campaign Number: 21V947000 (Electrical System, Structure); recall repair was performed prior to the contact purchasing the vehicle. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 37,200.

Filed Feb 14, 2026 · Electrical · NY

The safety situation happened when my wife's car got stuck while driving at about 25-30 MPH in the middle of the road.Next day At the nearest Audi service center they found that water has gotten into the rear of the trunk and damaged the electronic module which caused the car to stall.The first repair was estimate at 4600 $ .After the repair the car was inoperable.The next repair was estimated at another 4 700 $.After the second repair the car was inoperable again and the service department told me that the car needed to replace the entire transmission .Which they estimated at another 20 000 $. So the total damage is around 30 000$ .I contacted Audi USA about the whole situation when I received a negative message regarding the solution . I would like to point out that up until the moment mentioned we had no problems with the car .After my personal investigation of the problem ,I found that there was a safety recall # 21V‑947 for same problem .It was not issued for my car which meets all the criteria.It looks like it was hidden by the manufacturer. Audi distances itself from the whole problem and refuses to cover the costs of the damage.Thank good this happened on the city road where the speed is low .If this happened on the highway at 60 MPH it would have had tragic consequences .Where it would never have been figured out what caused the accident. From a safety perspective ,I m reporting this dangerous and unfair treatment of customers by AUDI USA regarding the hidden recall and denial of resposability that occurred and I request an investigation .

Filed Oct 8, 2021 · Engine, Transmission · 9,000 miles · NC

The contact owns a 2021 Audi Q5. The contact stated that while she was driving 65-70 MPH, the warning message "Transmission Engine Failure" appeared on the instrument panel. The vehicle inadvertently stalled while attempting to veer to the side of the road. The contact stated she was able to restart the vehicle after several attempts however, the vehicle was towed to her residence. The dealer was notified of the failure and advised the contact to take the vehicle to their location for diagnostic testing. The vehicle was taken to the dealer who diagnosed that the ECM chip had failed and needed to be replaced. The vehicle was repaired. The contact also stated while she was reversing, the vehicle inadvertently stalled. There were no warning lights illuminated. The vehicle was taken to the dealer who diagnosed that the clutch had failed. The vehicle was repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 9,000.

Filed Jun 29, 2021 · Electrical · NJ

Driver was with 2 passengers (3 young females) driving in a new 2021 Audi Q5 (less than 5 months old and less than 6000 miles) at about 70 mph on Garden State Parkway in NJ. A brake malfunction warning light appeared on the dashboard and within 5 seconds the car completely shut down in the middle lane of the parkway (in a black car at 10pm). This was the first notification or warning--nothing in the prior minutes or days. The driver was unable to restart the vehicle after several attempts and was unable to drift to the shoulder of the parkway. The SOS button in the vehicle didn't work and hazards didn't appear to be working either. Several cars driving at or above the 65 mph speed limit were braking and swerving at the last second to avoid collision and several cursed at the vehicle (as they were unable to see the vehicle in the darkness). Passenger in front seat called 911 to request assistance to provide a roadblock as it seemed imminent that the vehicle was going to be hit. 911 operator said safest place was to remain in the vehicle given the vehicle location and the speed of other drivers. The radio briefly turned back on and then turned off. Nothing else was working. When the tow arrived, the driver notified the individuals that the front hazards were working but the back hazards were not. The vehicle was towed to the local Audi Service Center. Eleven days after Audi accessed the vehicle, a report was received which said that the vehicle had an "elec[trical] malf[unction]" and that they "found car would not turn on and no communication to any control units. [They] performed hard reset to gate way control unit[,] found fuse blown for control unit[,]  replaced fuse [and] still same concern found[.] [G]ateway control unit internally faulty causing car not to start[.] [R]eplaced and recoded control unit [and] cleared faults and test drove car[.]" The report also notes that 3 weeks after the car was leased, the vehicle owner indicated that the car was stalling out.Â