AUDI Complaints

2020 A4 Allroad MMI staring to crash/restart randomly during drive every 5-10min and sometimes back to back crashes for 3-4 times. During this time, no call can be made, no navigation, and no backup camera / backup warning/ backup cross traffic alarm. The issue emerged sometime in February or March 2025.

While reversing out of a parking space, the steering wheel on my 2024 Audi A4 Allroad wagon suddenly locked completely and could not be turned in either direction. A warning message appeared stating “Steering malfunction. Safe to drive.” However, the vehicle was not safe to drive due to complete loss of steering functionality. Restarting the vehicle multiple times did not resolve the issue. The vehicle was towed to an authorized Audi service center. At the dealership, the steering was functional again and no active faults were present. However, the diagnostic scan showed a stored trouble code: U103100 – FlexRay data bus No synchronization, logged at the exact time the failure occurred. The dealership confirmed no visible wiring damage or hardware fault but could not replicate the issue. The battery was tested and not deemed low enough to replace. No software updates or service bulletins were applied. The service center declined to escalate the issue to Audi Corporate, stating that escalation is only permitted if the issue occurs a second time. This incident involved total loss of steering, which poses a serious safety risk. There were no prior warning signs before the failure. The issue has not recurred yet, but the root cause remains unresolved and could endanger the driver and others if it happens while the vehicle is in motion.

The Audi MMI (Multi Media Interface) system plays a crucial role in enhancing safety features by providing a user-friendly interface for managing various driver assistance systems and safety-related functions. These include features like emergency calls, roadside assistance, and the integration of driver assistance systems like adaptive cruise control and collision avoidance assist.

By the dome light, it leaks water when it is pouring rain very heavily. It also drips water by the passenger side shade visor. The dome lights will dim and get brighter consistently as it is dripping. the driver side headlight also gets foggy when it rains, which causes the one side of the vehicle not being able to see out from. The rain in the inside goes near the electrical outlets and sometimes gets into it, if i dont wipe the water away. At night time it is dangerous, with the lights dimming & getting brighter , while also leaking from the top as I have to dry it, try to turn the lights off and drive at the same time. No specific date this has occured, it has happened for approximately 3 months now.

While backing up in reverse, the MMI screen/system will crash and reboot, and the backup camera will stop functioning. This will trigger an instrument panel safety alert and tone from the vehicle that the backup camera is not functioning (the MMI/entertainment screen will be blank). The system will then reboot. This issue also occurs while driving. The effect is random, and can happen multiple times during a short drive, or just once. Each time the system crashes, the screen goes blank, and then the system will reboot and restart a few moments later. This issue surfaced in March 2025. A local Audi dealer could not replicate the issue, but seemed to understand or be familiar with what I described. After a software update of the MMI system, the issue was not resolved. They have recommended a $4,000 part replacement that they cannot confirm will address or resolve the issue. This is unsafe. This can occur while driving in reverse. This issue affects what I believe to be a government mandated safety feature — the backup camera). So far, I have not found any information that suggests Audi is taking this issue seriously.

The auto uses the Audi MMI system which controls basic functions such as radio, navigation, etc. The MMI in our car has randomly been crashing, which most importantly shuts down navigation at VERY inopportune times! I have read about this in a number of forums, and have tried various ways of resetting the system, but the problem persists. The forums suggest this is a common issue with this generation MMI.

I am reporting a severe defect in my 2020 Audi Q7 involving “coolant migration” due to a faulty water pump, a known issue in Audi models (Q7, S4, A6, 2013–2022). This poses critical safety risks due to sudden failure with minimal warning. My out-of-warranty Q7 showed minor coolant fouling near a solenoid, with normal coolant levels and no fluid added. The dealer quoted ~$6,000 to replace the water pump and vacuum system. This defect is highly dangerous due to: Sudden Power Loss: Coolant in the vacuum system impairs solenoids and lines, disrupting engine/turbo function. This can cause abrupt power loss, risking loss of control in traffic or at high speeds, potentially leading to collisions. Catastrophic Overheating: A failing water pump may halt coolant circulation, causing rapid engine overheating without warning, risking sudden engine shutdown and stranding drivers in hazardous conditions like highways. Brake Assist Failure: The vacuum system powers the brake booster. Contamination can reduce braking effectiveness, increasing pedal effort and stopping distances, heightening collision risks in emergencies. Emissions Control Issues: Coolant fouling affects PCV and EVAP systems, causing misfires, stalling, or increased emissions, potentially triggering check engine lights and compromising engine stability. Undetectable Progression: The defect often shows no clear symptoms or warnings until severe damage occurs. My vehicle had only minor fouling that could only be detected by visual inspection, yet extensive repairs were needed, indicating the issue’s stealthy nature, which prevents timely driver intervention. Systemic Issue: Forums and a class-action lawsuit confirm this defect across Audi models, yet owners face high repair costs post-warranty. This defect endangers drivers and others by risking vehicle failure, impaired braking, and unstable performance. I urge NHTSA to investigate and mandate a recall or extended warranty.

The contact owns a 2015 Audi Q5. The contact stated that there was an abnormal leak underneath the vehicle. In addition, the contact stated that the vehicle failed to start up as intended. The contact stated that the coolant reservoir was refilled; however, the failure persisted. The vehicle was diagnosed on the scene by an independent mechanic, who determined that water pump had failed. The independent mechanic related the failure to NHTSA Campaign Number: 18V229000 (Engine and Engine Cooling); however, the VIN was not included. The local dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 140,000.

Audi MMI keeps restarting every 5-15 minutes. During the restart the screen goes blank and starts up again. This sometimes happens while parking or backing up and all safety features become disabled.

Charging limited to 80% for over 18months now with the safety recall. Batteries are degraded and range dropped to 130miles earlier this year. Ability to drive safely impacted by low battery warning on multiple occasions and forced reduced speeds in rush hour traffic during in city commute. Local dealership is pointing to Audi not sending replacement batteries and safety limitation of 80% charge.