2021 Audi Q5 Problems

What owners report

Owners of the 2021 Audi Q5 most often describe sudden electrical shutdowns tied to water reaching the gateway control module located under the rear seat, followed by reports of no-start or stall conditions and loss of power steering. A second recurring theme is engine and transmission trouble: a few owners report internal engine bearing damage with metal debris in the oil, while others describe shuddering at low speed when turning, occasionally traced to the all-wheel-drive clutch or rear differential. Infotainment and driver-assist complaints (back-up camera, instrument cluster going dark, unexpected Pre Sense braking) round out the sample. Many of these complaints were filed below 20,000 miles.

1. 1
   Electrical system

   Water reaches gateway module under rear seat, car shuts down

   • 25 complaints (34%)
   • median 20,000 mi at 1.5 yrs old (3 state mileage, few)
   • filed 2021–2026

   Owners describe multiple warning messages appearing at once — brake, steering, transmission and electrical faults — followed by the vehicle losing power and stopping, sometimes with the windows moving on their own. Several say the cause was liquid reaching the gateway control module under the rear seat area, in some cases from a spilled drink and in others from water entering through a sunroof drain or the rear of the vehicle. Complaints describe the dealer diagnosing a wet or shorted module, replacing it, and telling owners the damage was not covered because liquid exposure is not a warranty item; a few mention long waits for the replacement part. Reported across a wide mileage range in the sample, from vehicles with only a few hundred miles to around 50,000, and after both spills and rain or water ingress.

   Recall 21V947000

   What to check: Ask whether recall 21V947000 (gateway module protective cover) was performed and whether the module has ever been replaced for water damage. Check for damp carpets or water stains under the rear seat and rear cargo area, and confirm sunroof drains flow freely.

   2 excerpts from owner complaints in NHTSA records

   “Q5 has a very serious defect, that is, there is a gateway module located under the rear seat cushion/cup holder. All of the communications to all the controllers go through this little box. If water spills, it collects around the gateway and corrodes it, which will shut down the car. This shutdown occurred while I was driving my family. Lost all power, engine, electrical, everything. Barely coasted out of the roadway. …”

   NHTSA complaint #11386836, filed 2021-01, 600 miles

   “On August 19th, we drove our Audi through heavy rain early in the day on Interstate 90 to go to Mass General Hospital. It was then parked in their covered parking garage. When we went to return home, we were on the entrance ramp to I 90 East and suddenly the car displayed messages of brake failure, electrical failure, steering failure, and then it died. It could not even be put in park. I was able to coast to the narrow shoulder. It was towed to Brookline Audi. …”

   NHTSA complaint #11430205, filed 2021-08
2. 2
   Engine

   Engine stalling or failure with metal debris in oil

   • 7 complaints (9%)
   • median 43,000 mi at 2.4 yrs old (3 state mileage, few)
   • filed 2021–2026

   Complaints describe the engine quitting or losing power while driving, sometimes with a malfunction or check-engine light and shaking beforehand, and in other cases a coolant or fan warning that came and went. Owners report being told by the dealer that metal fragments were found in the engine oil, or that the connecting rod bearings had failed and damaged the engine, requiring replacement. Some mention weeks without the vehicle and no repair completed at the time of filing. Most reports in the sample fell between roughly 40,000 and 70,000 miles, with some as low as about 9,000 and one at about 138,000.

   Recall 22V7530002 related service bulletins

   What to check: Ask whether recall 22V753000 (connecting rod bearings) applies to the VIN and was completed, and look for a documented oil and filter service history. Have an independent shop check for metallic debris in the oil and for coolant leaks before purchase.

   2 excerpts from owner complaints in NHTSA records

   “The engine has failed and I am not sure why my Q5 was not included in the recall for coolant issues leading to engine failure. My issue started last winter when the car would suddenly kick in a loud fan. It would flash a warning that the start/stop malfunctioned as it only happened when stopped and/or parked. It was extremely alarming to hear so I would turn the car off and let it sit. When I started it up, there were no warnings and would drive normally. This continued to happen randomly. …”

   NHTSA complaint #11627279, filed 2024-11

   “Date of Incident: 11/09/2025 • Location: I-30 near Cumby, TX (towed to Audi Fort Worth). Daughter was stranded on busy highway in middle of nowhere. Texas State Police came to her aid and helped w tow truck which cost $650. Engine catastrophically failed at ~50k + miles due to metal shavings throughout oil — Audi Fort Worth made the statement and I have picture of metal shavings. Which is the exact defect in **NHTSA Recall 22V753 / Audi TSB 13i5** (connecting rod bearing damage from factory machining debris). …”

   NHTSA complaint #11699332, filed 2025-11
3. 3
   Forward collision avoidance

   Pre Sense braking or warning without an obstacle

   • 8 complaints (11%)
   • typically at 2.9 yrs old
   • filed 2021–2026

   Owners report the Pre Sense system tightening the seat belts or applying the brakes when no vehicle or pedestrian was nearby, in some cases while stopped at a light and in others while cruising. Complaints describe alarm at the sudden deceleration and say the dealer could not reproduce the event; one owner reports adaptive cruise control braking unexpectedly and resetting the set speed. Described across a range of mileages, most often during steady-speed driving or while stopped in traffic.

   What to check: During a test drive, try adaptive cruise control on an open road and note any unexpected braking or speed changes. Ask whether the forward camera and radar were calibrated, especially if the car has had windshield or collision repair.

   2 excerpts from owner complaints in NHTSA records

   “Vehicle: 2021 Audi Q5 I am submitting this complaint regarding a serious safety defect involving unintended emergency braking. On September 10, 2025 and again on January 8, 2026, my vehicle suddenly applied emergency braking while I was driving and there were no vehicles, pedestrians, or obstacles in front of me. The dashboard displayed “Auto Pre Sense” during both incidents. These unexpected braking events created a high risk of a rear-end collision and placed me and other drivers in immediate danger. …”

   NHTSA complaint #11710435, filed 2026-01

   “The Audi Pre Sense automatic braking system engaged without warning and without reason bringing the vehicle to a sudden and complete stop in the middle of an intersection and slamming my body backwards and causing my head to go forward nearly hitting the steering wheel. A school bus was directly behind me and was able to stop in time before it ran into the back of my vehicle, but it could have caused serious injury or death to multiple people. It caused a considerable amount of pain in my neck the day after and soreness in my ribs. …”

   NHTSA complaint #11581957, filed 2024-04
4. 4
   Transmission and drivetrain

   Shuddering or binding when turning at low speed

   • 8 complaints (11%)
   • median 94,000 mi at 2.6 yrs old (2 state mileage, few)
   • filed 2023–2026

   Owners report a shudder, vibration or binding sensation at low speeds, particularly in tight turns or when pulling away from a stop, with some describing it as the vehicle bucking. Complaints state the dealer traced it to the all-wheel-drive clutch and rear differential or described it as normal, and that uneven rear tire wear was noted in some cases. A service bulletin in the input describes addressing binding or vibration in tight turns on quattro Ultra vehicles. Reported from around 20,000 to 50,000 miles in the sample, typically at parking-lot or turning speeds.

   1 related service bulletin

   What to check: Test drive at low speed through full-lock turns in both directions and feel for vibration or binding. Ask whether the quattro Ultra bulletin was applied and check rear tire tread depth for uneven wear.

   2 excerpts from owner complaints in NHTSA records

   “I was driving at highway speeds when a Transmission Malfunction warning appeared, and the vehicle lost the ability to accelerate. Once I was able to pull over and put the vehicle in Park, it completely lost the ability to engage Drive or Reverse, leaving me stranded. Important to note pulling over was difficult as I was on a highway driving ar 70mph speed and trying to locate safe space to stop avoid collusion. My car towed to the nearest dealership for repairs. …”

   NHTSA complaint #11747226, filed 2026-06

   “My car always did a weird shuddering thing when taking turns a certain way. I just thought it was part of how the new vehicle worked. I thought it was strange when I took my car in to repair a front tire, and was told / showed that the back two tire treads were worn down. The new car only had 20,249 miles. But I read somewhere that some new car dealers use lower tread tires to save money, so I did not pursue anything. Then, when someone pointed out that the 'weird shuddering' was not normal, I took it into Audi to have them look at it. …”

   NHTSA complaint #11688929, filed 2025-09
5. 5
   Electrical system

   Instrument cluster or display goes dark

   • 10 complaints (14%)
   • typically at 1.4 yrs old
   • filed 2021–2025

   Complaints describe the screen behind the steering wheel going blank while driving, leaving no view of speed, gear, fuel level or warning lights. Owners say the dealer replaced the instrument cluster assembly or found a loss of power to the cluster, and some report being told their vehicle was not covered by a recall affecting other models. Others mention the main center screen turning white, blue or black at the same time. Mileage in the sample varies widely, with several reports on vehicles above 30,000 miles and others not stating mileage.

   Recall 22V7420003 related service bulletins

   What to check: Check that the cluster and center display power up cleanly and dim correctly, and ask whether any software update or display-related bulletin was performed. Review service records for a prior cluster replacement.

   2 excerpts from owner complaints in NHTSA records

   “While driving on the highway (70mph) at night, my instrument panel went completely dark. I was not able to see the speed I was driving and my warning sounds/lights were not working. The dealer could not get me an appointment for 4 weeks so I took it to a mechanic who specializes in European cars. The diagnostics indicated a loss of power to the instrument cluster/panel. I was told there was an active recall for this issue, but my VIN was not included. …”

   NHTSA complaint #11678159, filed 2025-08

   “Virtual dashboard where speedometer and safety warning are displayed has stopped working. Display has completely shut down. I cannot see any critical information to drive vehicle. I contacted the dealership to address a serious safety concern that mirrors an issue already under active recall for other models by the manufacturer. Despite this, the dealership has refused to perform any inspection or repairs, stating that my specific model is not currently included in the recall—even though the symptoms and risks are identical. …”

   NHTSA complaint #11661004, filed 2025-05

Buying note. Check that the open recalls for this year (including the gateway module cover and engine bearing campaigns) were completed on the specific VIN, and look closely for water intrusion around the rear seat and cargo area. A pre-purchase inspection that includes a scan for stored fault codes and a look at the oil for debris is worthwhile on these vehicles.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.