32 of the
338 complaints filed about the Audi A4 Allroad
are about the other systems —
9% of everything owners reported.
The worst model year for it is 2020.
The rear carrier frame has rusted through. There are trim pieces that are attached to the frame , they trap and hold moisture and salt like a cup under the frame, not visible during a regular inspection. My car only has 95k has been garage kept and taken through car washes in the winter with undercarriage wash (to no avail). After some investigation it seems that Volkwagon /Audi corp. has known about this issue since 2009 , but has kept it internally and not made owners aware of this. It would have been so simple to just remove these trim pieces and I wouldn’t have this hole in my car frame, which has basically made it unsafe as this frame holds my suspension and rear differential. There has been a class action lawsuit filed in The NJ District Court by an owner but it is only for Q5 and S5 thus far. In looking for a frame it seems that A4 shares this same frame. One of the guys in service told me, Audi knows about this, they stopped using the trim because of it and they might help you out. The bill from Audi to repair my car is $7417.00 they offered to give me $500 off( gee thanks) My car hasn’t been driven much the last three winters ( RV travel) and had someone notified me my car would have been in the 12 year unlimited mileage corrosion warranty period, now it is just outside of that. There is an article that I read about the Lawsuit and it says that it’s not so much the rust issue as it is the fact that they’ve been handling it internally for over a decade to avoid a recall. I’m really bummed out, I love this car that looks amazing but basically has cancer. No warning lamps, I’ve been told not to drive it by the dealer (Audi Stratham) because it’s a Safety issue. My son found it when the trim piece fell off ( because the bolt rusted out of the frame, resulting in a hole the size of my fist) No other symptoms, this rust didn’t just start it’s been brewing for years . I had an independent shop tell me that it’s a known problem and to take it to the dealer.
NHTSA complaint #11752972 — an unverified report by a vehicle owner.
Rear Suspension cross- member. Extensive corrosion hidden behind stone guard trapping dirt and moisture. I would not have known the rust was there if the stone guard had not come apart from the cross member I cannot trust the safety of this vehicle until it is repaired Audi requires a dealer inspection at the cost of the consumer. Audi Suspension cross member components are the same for many models. The Allroad should be included in the class action lawsuit.
NHTSA complaint #11748467 — an unverified report by a vehicle owner.
The MMI system on my 2020 Audi A4 Allroad will reset randomly while I am driving. This will occur while I'm driving and is very frustrating and dangerous, especially when using the MMI for navigation. I've reached out to the dealership regarding warranty, but have yet to hear back. From online forums, this has become a recent issue across many 2020 A4s. People have been forced to pay $500 for a software update that may or may not resolve the issue.
NHTSA complaint #11671313 — an unverified report by a vehicle owner.
The Multi Media Display (MMI) continually resets while reversing which causes the back up camera to turn completely off. This also happens intermittently while driving.
NHTSA complaint #11670797 — an unverified report by a vehicle owner.
The MMI constantly reboots every 3-10 minutes every trip. Each time the system reboots, it requires me to interface with it to get it logged back in. The MMI is also the main interface with the navigation system, which restarts as part of the reboot, requiring me to restart the route while driving. Recently, it occurred while driving in downtown Boston, nearing my destination, which required several quick turns, ended up having to back track once the MMI came back on.
NHTSA complaint #11669008 — an unverified report by a vehicle owner.
I own a 2020 Audi and have been experiencing a persistent and widespread issue with the MMI (Multi Media Interface) system. While driving, the MMI randomly shuts down and reboots multiple times during a single trip. This happens whether or not I have any devices connected via Bluetooth, USB, or Apple CarPlay. The shutdowns are completely unpredictable and can occur at any time, causing the loss of navigation, audio, backup camera, and parking sensors. Sometimes, I receive warnings about user profiles or that the sensors have stopped working. I have tried all recommended troubleshooting steps—hard resets, disconnecting all devices, disabling wireless charging, and even having the dealer perform software updates—but nothing has resolved the issue. I’ve also been quoted significant fees for diagnosis and updates, yet Audi has not provided a permanent solution. This problem started for me in early 2025 and has only gotten worse, with more frequent shutdowns that affect the safety and usability of my vehicle. From what I’ve seen in owner forums, I am not alone—many other 2020 Audi owners are dealing with the exact same problem. I believe this is a software issue affecting a large number of vehicles, and I urge the NHTSA to investigate for a possible recall or manufacturer fix.
NHTSA complaint #11668502 — an unverified report by a vehicle owner.
The infotainment system occasionally shuts down while driving, resulting in a blank screen and a reboot of the MMI after a short period. This is particularly concerning when backing up the car, as the sensors and backup cameras also become inoperative. The Audi dealership in Seattle performed the annual scheduled service in May 2025 but did not investigate this problem.
NHTSA complaint #11666201 — an unverified report by a vehicle owner.
The MMI (infotainment screen) constantly reboots every 10 minutes or so while driving, requiring me to re log back in in order to use maps or music or calls or backup cameras.
NHTSA complaint #11664018 — an unverified report by a vehicle owner.
The MMI system sporadically and repeatedly reboots while driving. When this happens, I lose: radio/media, Bluetooth phone connection, SOS, navigation, adaptive cruise control, forward collision warning, parking collision warning, automatic emergency braking and rear cross traffic warning among other things. This also causes a very large distraction and poses multiple safety issues. This problem has been going on for months. This is not the first problem with these systems. There was a recall (that got cancelled) a few years back around what Audi calls the "conbox". They did some sort of repair but the system has been crippled since. There have been connection issues, problems with map updates, and other failures since then. Diagnostics show multiple logged communication failures with this system. Any further diagnosis or repair, they want to charge thousands of dollars without any guarantee it will be fixed. I've gotten quotes of $4,500-5,000 for a module replacement, but they aren't even sure it will solve these problems. Since the problem started in warranty, I shouldn't be paying anything for these repairs. Dealer seems oblivious to the actual cause and wants to just milk me for cash. There is a growing number of owners with the same problem: [XXX] Due to the severity and number of occurrences, this should warrant a recall. Audi software is [XXX](and I'm a software engineer with 28+ years of experience, so I should know). The garbage they push on customers would have never passed review in any of my jobs. This is a severe safety issue and extremely poor customer service. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11660877 — an unverified report by a vehicle owner.
The MMI (Multi-Media Interface) in this vehicle is experiencing frequent unexpected reboots while driving, leading to a complete loss of functionality in critical systems, including: - Backup Camera & Rear Obstacle Detection – These systems become inoperable when the MMI shuts down, particularly during reverse maneuvers, significantly increasing the risk of collisions. - Navigation & Hands-Free Communication – The system failure disables Audi navigation as well as Android Auto/Apple CarPlay, making it impossible to rely on real-time directions or safely use hands-free calls while driving. - Driver Distraction – Reboots require user interaction to restore functionality, often demanding multiple inputs on the MMI screen. This forces drivers to divert their attention from the road, creating a serious safety hazard. A software update was performed by my local Audi dealer, intended to resolve the issue. However, just a few days after the update, the MMI rebooted again while backing up the vehicle, rendering the sensors inoperable and leaving the car stuck mid-maneuver for approximately 30 seconds—an extremely dangerous situation. The continued failure of the MMI system during driving, particularly driving while relying on navigation guidance and during reversing maneuvers, poses a direct threat to vehicle safety. The fact that the reboot issue returned immediately after a software update further suggests an unresolved systemic problem. Immediate corrective action is necessary to prevent potential accidents caused by loss of visibility, obstacle detection, and driver distraction.
NHTSA complaint #11660217 — an unverified report by a vehicle owner.
The MMI / Map Display will intermittently restart itself, sometimes as often as 5 minutes apart. Each time it reboots, there is a chance that manual intervention (PIN code entry or login) is required to get it working again. Until the PIN or password has been entered, maps and other core car features are unavailable. Having to deal with these reboots while driving is severely distracting - losing directions while driving is disorienting and has sent me down wrong turns in the past. If the MMI asks for a PIN or password after reboot, one has to stop looking at the road for however long it takes to enter that. The problem hasn't been confirmed by a dealer or service center, but there are several posts online where ~a hundred people are running into the same software issue, on the same car, that started at around the same time. The vehicle/component has not been inspected by the manufacturer, police, insurance representatives, or others. The dealership wanted to charge me a diagnostic fee to begin taking a look at it, and others haven't had luck getting the problem fixed for that fee. Other symptoms of the problem include a sluggish volume knob response, and CarPlay navigation being sluggish and the car's displayed position jumping back and forth. This problem happens at all speeds, on all types of roads, even at rest. The fact that it started happening on many different cars of the same model year at around the same time implies that it's likely a software issue.
NHTSA complaint #11657275 — an unverified report by a vehicle owner.
Audi installed plastic covers over sections of the subframe on allroad, Q5 models, and other models. These covers held in water and salt causing severe rusting and corrosion of the rear subframe. Subframes of these models are seriously structurally compromised and also hidden from view due to these plastic covers. It’s seems Audi is repairing some under their 12 year rust/corrosion/penetration warranty, but the response varies based on dealership (some people are being told this warranty only applies to body panels, others are told that they are ineligible due to not regularly servicing their vehicles at the dealer). Many others are past the warranty timeline. This issue requires immediate attention and a full recall. Thanks [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11643895 — an unverified report by a vehicle owner.
My MMI continually refreshes so that i need to look away from the road to reset the MMI / access to maps/ access to sirius XM radio. it is a distraction that takes eyes off the road to do resets.
NHTSA complaint #11602654 — an unverified report by a vehicle owner.
REAR VIEW CAMERA IS INTERMITTANT WHEN IN REVERSE AND BACKING UP THE VEHICLE. SOMETIMES THERE IS NO REAR VIEW CAMERA WHILE BACKING UP. MULTIPLE TRIPS TO AUDI DEALER - NOT FIXED. LOANER CAR FROM DEALER, 2018 AUDI A5 HAD EXACTLY THE SAME PROBLEM. NO REAR CAMERA - RADIO SCREEN INSTEAD. BUG IN AUDI SOFTWARE - THIS MODEL NEEDS TO BE RECALLED TO FORCE AUDI TO FIX THIS SAFETY PROBLEM. TWO PICTURES PROVIDED - ONE IS MY A4 AND THE OTHER IS THE AUDI A5 LOANER : BOTH SHOW THE CARS IN REVERSE AND THE RADIO SCREEN DISPLAYED - NOT THE REAR VIEW CAMERA LATEST OCCURANCE WAS 10/19 NO PICTURE TAKEN.
NHTSA complaint #11269731 — an unverified report by a vehicle owner.
THE FRONT CRASH MITIGATION SYSTEM CALLED AUDI PRESENCE DOES NOT WORK ON MY CAR. I BOUGHT AN AUDI CERTIFIED PREOWNED VEHICLE THAT WAS SUPPOSED TO HAVE ORIGINAL WINDSHIELD TO FIND OUT 6 MONTHS AFTER I OWN CAR THAT WINDSHIELD WAS REPLACED AND PRESENCE DOES NOT WORK. THIS IS A REQUIRED SAFETY SYSTEM IN MY CAR AND WILL COST 1700 TO REPAIR. AUDI OF AMERICA REFUSES TO FIX THIS UNDER WARRANTY DESPITE THIS BEING A FAULTY SYSTEM. THEY WILL NOT EVEN RETURN MY CALLS OR EMAILS. THE PRESENCE SYSTEM STOPS THE CAR SO AN ACCIDENT DOES NOT OCCUR.
NHTSA complaint #11240268 — an unverified report by a vehicle owner.
THIS IS A TIRE COMPLAINT ABOUT CONTINENTAL CONTIPROCONTACT 245/40/R18 79H TIRES. AUDI PRESTIGE A4 WAS PURCHASED FROM DEALER, FLETCHER JONES AUDI IN CHICAGO, ON 12/29/17. IT HAD BEEN A DEALER DEMONSTRATOR AND HAD VERY LOW MILEAGE. IT IS USED MOSTLY FOR CITY LOW SPEED DRIVING. ON 4/25/18 ALL 4 TIRES HAD MULTIPLE BUBBLES IN SIDEWALLS AND REQUIRED REPLACEMENT. NEW TIRES WITH WARRANTY WERE PURCHASED FROM DEALER. ON 7/6/18 ONE TIRE WAS REPLACED UNDER WARRANTY. ON 1/18/19 ONE TIRE WAS REPLACED WITH BUBBLES. ON 3/24/19 3 TIRES WERE REPLACED WITH MULTIPLE BUBBLES IN SIDEWALLS. ON 4/24/19 ANOTHER TIRE WAS REPLACED WITH BUBBLES IN SIDEWALL. AS A SCIENTIST I HAVE DIFFICULTY BELIEVING THAT THIS IS JUST BAD LUCK. THIS LOOKS TO ME LIKE POOR ENGINEERING OR A MANUFACTURING DEFECT. MY TIRES WERE COVERED UNDER WARRANTY, AND TO THIS POINT MY PERSONAL EXPENSE HAS BEEN LOW. WE HAVE NOT HAD AN ACTUAL BLOWOUT OR ACCIDENT. NEVERTHELESS, I HAVE SAFETY CONCERNS FOR MYSELF AND THE GENERAL PUBLIC. THERE MUST BE SOMETHING DEFECTIVE IN THESE TIRES -- AND BEFORE ANOTHER PERSON GETS INJURED OR KILLED FROM A BLOWOUT
NHTSA complaint #11206008 — an unverified report by a vehicle owner.
WHILE DRIVING 35 MPH ON A WELL-PAVED ROADWAY, MY SUNROOF EXPLODED. I WAS NOT HIT BY A ROCK OR ANYTHING ELSE. THE ONLY SOUND I HEARD WAS THE POP WHEN THE EXPLOSION HAPPENED. THANKFULLY, MY SUN SHADE WAS CLOSED AND THE GLASS DID NOT ENTER THE VEHICLE.
NHTSA complaint #11205359 — an unverified report by a vehicle owner.
AIR SYSTEM IS PUTTING OUT EXCESSIVE DEBRIS AND PARTICLES . COMPUTER MMI DOES NOT WORK. CAN NOT LOG INTO TO AUDI PORTAL PROPERTLY AND SYNC. MY SOFTWARE. NEVER RECEIVED MY RECALL ON THE ELECTRICAL SYSTEM WIRING. HAD IT AT THE DEALER FOR SERVICES MULTIPLE TIMES AND PROBLEM NOT RESOLVED. KEEPS REOCCURRING
NHTSA complaint #11128009 — an unverified report by a vehicle owner.