Audi Q5 lane assist problems

Filed Sep 8, 2026 · Driver assistance · NY

While driving, the Active Lane Assisting warning signal will come on and make warning noise which startles the driver.

Filed Aug 2, 2026 · Electrical · ME

While driving my 2026 Audi Q5, the instrument cluster display went completely black twice while the vehicle was in motion, eliminating my speedometer and all warning indicators. Separately, during another drive, the vehicle displayed "Suspension: malfunction! Safely stop vehicle" on two occasions within minutes of each other, at approximately 15 mph and 17 mph, each accompanied by illuminated ABS and BRAKE warning lights. Immediately after, the odometer failed, displaying dashes instead of mileage, and the display spontaneously switched from miles to kilometers. This was followed by approximately 15 additional system warnings disabling adaptive cruise assist, lane departure warning, exit warning, active front assist/distance warning, parking systems, fatigue warning, traffic sign recognition, distraction warning, rear cross-traffic assist, and emergency assist. The vehicle was taken to an authorized Audi dealer for diagnosis. The technician was unable to duplicate or identify the cause of the failure. I have photographic documentation, with timestamps, of every warning message described above. This appears to be an intermittent failure of a central vehicle module or communication bus affecting braking, stability, and driver-assist systems simultaneously, creating a safety risk while driving.

Filed Jul 29, 2026 · Driver assistance, Electrical · TX

I bought this car in 12/2025. After putting approximately 60 miles on the car, the onboard computer would not save the inputted data. Took back to dealership and update performed. Upon returning the car for this work, the adaptive cruise control would shut itself off on the way to the dealer. They could not replicate this issue. Since having the car for about 6 months the car has been in to the dealer approximately 7 times all for different warning lights including having the module needing to be replaced that controlled the A/C. The most recent problem is the vehicle locking up its brakes and rapidly fastening down on the seatbelt while driving stating a red danger message that flashes on the informatic screen and then disappears but will not show up on the MMI screen. This has happened twice in the last 10 days. Upon the first visit I was told that Audi has been having a lot of problems with the 2025 Q5 because of the computer. The car is currently back in the shop for continued safety components selectively turning off on their own and the car slamming on its brakes when there is no adverse event. There is supposed to be a patch coming out in Quarter 3 2026, but an actual update isn't set until 04/2027 per Audi service. I have stressed how not having these functions working correctly has made the car a hazard to drive as I never know when it will act appropriately. Also the lane departure feature does not always work appropriately and will try to hold in a improper travel and will jerk the wheel. I have completely turned that function off since it has tried to turn me into on coming traffic.

Filed Jul 3, 2026 · Driver assistance · WA

The lane keeping assistance system was engaged as we were traveling at approximately 55 mph and started around a right hand curve. The system aggressively jerked the car to the left and with the wheels on the rumble strip associated with the center double yellow lines. There was traffic flowing the opposite direction and we would have been head to head with an oncoming truck had the driver not stopped the car. The car has been to the dealer, they can not reproduce any issues with the system and have asked that video be taken the next time this happens which is not feasible nor safe. I have not driven with the lane keeping assistance on since this incident, this was not the first time that I had issues with it trying to turn the car out of a lane, and I do not feel comfortable with it engaged any longer. There were no warning lights or messages.

Filed May 13, 2026 · Driver assistance, Electrical · CA

The vehicle exhibits multiple, unresolved safety-critical defects across software and mechanical systems that create an unpredictable and dangerous driving environment. Despite multiple repair attempts, the manufacturer has failed to certify the vehicle as safe for operation. 1. Critical ADAS Failures (Forward Collision/Lane Keeping): Automatic Emergency Braking (Pre-Sense): The vehicle suffers from unprompted alerts and phantom braking incidents, creating an immediate risk of rear-end collisions. Lane Keeping Assistance: The system has experienced unexpected steering pull, which could lead to an unprompted lane departure. Adaptive Cruise Control (ACC): The system consistently fails to detect lead vehicles in 40% to 50% of instances. The most recent failure was documented via timestamped screenshot on May 12, 2026, around 4:07 PM PT. This defect is reproducible and renders the automated safety suite unreliable. 2. Powertrain & Mechanical Defects: Pneumatic Air Leaks: The vehicle exhibits 100% pneumatic air leaks during acceleration. The service center has dismissively characterized a total pneumatic system failure as "normal," which I find technically unacceptable and a sign of neglected mechanical integrity. 3. Electrical & Starting System: Recurring Ignition Failures: The vehicle has experienced multiple failures to start, most recently leaving my child and me stranded for 10 minutes. Safety & Use Impairment: These intermittent failures compromise the vehicle's utility and the safety of my family. Incident History: The first time this occurred, I called Audi Roadside Assistance, but the engine started approximately 30 minutes later; as a result, I do not call roadside assistance now when it happens and instead attempt to restart it repeatedly. Current Status: I am forced to drive the car in a constant dilemma, knowing it might fail at any time and leave me stranded.

Filed Mar 20, 2026 · Driver assistance · TX

The ADAS is not working properly. Adaptive cruise control, emergency assist, lane departure, active front assist, distance warning, traffic sign recognition, adaptive light, etc. are all not working. The check engine light is illuminated, the key fob would not open car (not a battery issue) and the seat belt tensioner is not working properly. Those ADAS features are there for a reason and that is to enhance the safety of me, my passengers and other drivers. The key fob allows quick access to my vehicle, which enhances my safety when alone or with others. The seat belt tensioner provides restraint during an accident so neither I nor my passenger will go head first into the windshield, air bags and/or steering wheel/dashboard. The problems have been confirmed with the dealership. Yes, it has been inspected by the dealership. Yes, they first appeared January 2025. My car is currently at the dealership supposedly waiting for a backordered seat belt tensioner. It has been at the dealership for 22 days and I haven't any idea of when I will be getting the vehicle back. I purchased it in October 2025. It has been driven less than 5,000 miles.

Filed Feb 20, 2026 · Driver assistance, Visibility · KS

I periodically receive warnings for adaptive light malfunctions, headlight assistant malfunctions, active lane assist malfunctions, traffic sign recognition malfunctions, adaptive cruise assist malfunctions, and high beam assist malfunctions. The Audi dealer confirmed these issues and stated a solution is being worked on but currently not available since it appears to be a software issue. These warnings first appeared within the first 250 miles and has continued to periodically appear. These issues are available for inspection. The malfunctions jeopardize the safety measures which are standard on the car.

Filed Feb 12, 2026 · Driver assistance · AZ

I am reporting a recurring safety defect in my 2025 Audi Q5 (VIN: [XXX] ). The vehicle has been in the dealership for approximately 42 non-consecutive days for repeated malfunctions of multiple safety systems.While driving, the vehicle displays warnings and disables the following systems: SOS, Adaptive Cruise Assist, Active Front Assist/Distance Warning, Lane Change Warning, Proactive Occupant Protection, Traffic Sign Recognition, Adaptive Light, Emergency Assist, High-Beam Assistant, Lane Departure Warning, and Distance Warning. These systems intermittently fail and become unavailable, triggering dashboard alerts and warning messages.Despite multiple repair attempts, the same failures continue to reoccur. The dealership has acknowledged the issue and stated that a fix exists; however, they advised that the necessary repair parts or software will not be available for approximately 3–6 months. I was instructed to take the vehicle back and continue driving it until the fix becomes available.I am extremely concerned about operating a vehicle with known unresolved safety defects affecting numerous driver assistance and crash prevention systems. The repeated failure of these systems significantly impacts the safe operation, reliability, and value of the vehicle. I am requesting investigation into this matter and the delay in providing a timely repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 8, 2026 · Acceleration, Driver assistance · FL

I bought the car on September 2, 2025. The car has been in the dealer 5 times. The last one started on December 2, 2025, and still in the dealer as of today (January 8, 2026) no solution has been found. Most of the time is having problem with the technology in the car. I cannot even drive it. It has problem with cameras, Traffic sign recognition, adaptive cruise assistant, adaptive light malfunction, headlight assistant malfunction, Audi active lane assistant malfunction, accessibility service malfunction, driver system malfunction (limited vehicle performance), and the list keep on going. I am trying Audi America to buy my car back. I have the car for 4 months and I have use it for approximately 3 weeks (milage as of today 1,529 - several miles done to test the car by the technicians).

Filed Dec 25, 2025 · Acceleration, Driver assistance · FL

* Primary Component: Forward Collision Avoidance * Secondary Component (if available): Electrical System / Lane Departure Step 3: The Incident Description (Copy & Paste below) > Summary of Safety Defect: > The vehicle is experiencing a critical, recurring failure of the Advanced Driver Assistance System (ADAS). There are two primary life-safety issues: > * Phantom Braking: The vehicle initiates sudden, forceful emergency braking without any external hazard or obstacle present. This rapid, unprovoked deceleration occurs at highway speeds, creating an immediate risk of rear-end collisions. > * Total Warning Failure: The system fails to provide any visual or audible "Pre-Sense" alerts when actual hazards are present. The safety suite is non-functional and fails to warn the driver of oncoming items. > * Context: The vehicle has undergone four repair attempts and has been out of service for over 30 days. As of late December 2025, the manufacturer has been unable to resolve these safety-critical software and sensor malfunctions. >