Service Brakes Problems of Audi A6 - part 1

I am writing to formally file a complaint regarding persistent mechanical failures and safety concerns with my 2014 Audi A6, VIN: [xxx] , which have resulted in significant repair expenses, inconvenience, and potential safety hazards. Despite having the front brakes and sensors replaced in the previous year, I recently experienced brake warning lights and related malfunctions. According to the most recent service report from Audi bethesda (repair order [xxx], dated may 9, 2025), it was discovered that the incorrect brake pad sensor had previously been installed and that connectors were not properly secured. Additionally, the repair team found further issues with the abs sensor and rear brake pad sensors—indicating an ongoing pattern of misdiagnosis and improper installation by authorized service providers. More concerning is the failure of the vehicle’s fuel system, including the fuel pump and filter, which were replaced at considerable expense. According to the repair documentation, there were still unresolved low fuel pressure faults present even after parts replacement. The technicians cited potential metal contamination in the fuel meter valve (n290), which could require full fuel system replacement—an unacceptable situation for a vehicle that has already undergone such costly repairs. After further internal investigation by mitch carr’s auto service several other concerns were brought to my attention. 1)battery left to die 2)fuel filter replaced 3)glow plug replaced 4)injector seal replaced 5)re-gen dpf procedure to clear faults 6) rubber stem on tire replaced information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2014 Audi A6 🔎.

Car slowed down and shut off in the middle of the road.

See all problems of the 2019 Audi A6 🔎.

The camera associated with the adaptive cruise control and collision warning systems thought there was an object in the road multiple times while on active cruise control. This resulted in the brakes being engaged - could have been rear ended very easily causing an accident. The camera system has now stopped working all together resulting in the safety systems being disabled entirely as well as the cruise control. After researching the issue and talking to the dealership I have found the camera to be a very common part failure with all Audi's. I can't even get the part there is such a large demand for repairs.

See all problems of the 2016 Audi A6 🔎.

- abs module has intermittent failures, available for inspection - anti-lock brakes will not work - yes, the problem reoccurs and the module loses power and then errors out - others - vcds - abs lights come on and brake light stays illuminated.

See all problems of the 2004 Audi A6 🔎.

I had my coolant system repaired before I found out there was a recall now my thermostat went bad. My brakes need to be replaced too much and my screw for my radio and system display stopped working every time you change fees it pops.

See all problems of the 2013 Audi A6 🔎.

Massive safety liability here. My 2019 Audi A6 was on the highway traveling at 75mph on 4/25/2023 at noon when with no prior warning, all of the electrical systems started failing rapidly. In the course of 90 seconds, there was an electrical malfunction warning, quickly followed by malfunction warnings for steering, brakes, and cascading shutdowns of all systems like the transmission, abs, collision warning, lane departure, lights, hazard warning lights, instrument screens/clusters, hvac, windows- literally everything. A complete failure of every component and safety system while driving highspeed is extremely dangerous. Had this happened at night, I would have been bricked in the middle of the road without headlights, hazard lights, airbags, etc. The car had to be towed away to the dealership and is available for inspection. The dealer is aware of this issue and called it a 48 volt starter/ alternator issue which is apparently systemic/ widespread with 2019-21 Audi 48 volt architectures; parts are generally backordered for months. Please take note: there is an extremely high risk that someone will be killed and seriously injured as a result of this defect. The vehicle is awaiting inspection and repair at an Audi dealership. It is under extended manufacturers warranty at 50,700 miles. No other diagnostics/ inspections/ or reports have taken place yet.

This 2019 Audi A6 purchased on Aug/2020 brand new from an authorized Audi dealer, after several complaints on its breaking behavior it has been diagnosed at the dealer with "bended brake discs or pressure plates". Vehicle has been used as a family car an driven in a normal way only by myself. The odometer currently reads 32,165 miles. I believe that the material or workmanship were/are defective. The safety issue is in relation to the longer distance it takes to break and the extreme vibration on the steering wheel when going over 55+mph. No warning messages or any other vehicle feedback is received.

Gateway unit that is located under the rear seat has an inadequate insulation and is susceptible to liquid exposure and electrical failure. A liquid penetrated the rear seat and short-circuit the gateway while vehicle was moving resulting in a near-accident by shutting down power steering, brakes, and many of the car's systems. Failure messages began appearing and vehicle was unresponsive to driver actions. Emergency blinkers were not working at the tail lights which is a critical safety hazard for a disabled vehicle on the road. Dealer confirmed gateway unit failure due to the water exposure and recommended the replacement of the unit. Vehicle had no warning lights or messages prior to the incident.

See all problems of the 2020 Audi A6 🔎.

The vehicle vibrates heavily when the brakes are applied at highway speeds. Brakes rotors replaced with less than 15k miles vehicle appear to have the same issue and has confirms by Audi dealer but refused to address the safety issues. . . Rotors replaced at 25k miles and vehicle now has 40k miles and need rotors replace again.

Tl the contact owns a 2012 Audi A6. The contact stated that while driving at an undisclosed speed, a message was displayed on the instrument panel indicating that the collision avoidance system was unavailable. The vehicle was taken to d. Patrick Audi located at 200 n green river rd, evansville, in 47715, who was unable to determine the cause of the failure. The manufacturer was notified of the failure. The failure mileage was 110,000.

See all problems of the 2012 Audi A6 🔎.

The vehicle vibrates heavily when the brakes are applied at highway speeds. No accident has occurred but is of great concern.

At high speeds (around 65 or more), when I apply the brakes I can sense some vibration in the brakes. I mentioned to the dealer that the brakes are not smooth as in my other cars. I was told, it is because Audi is a "performance car. " now I know that it is just poorly built.

All four brakes rotors were warped at 37k and had them replaced. Now the dealership is telling me the front ones are warped again after 12k miles. Car vibrates when you brake.

Audi westmont leased me a brand new 2019 A6 last November 12, 2018. They claim "all" of Audi's 2019 A6's come with "summer tires" on them and getting an "all season" or "winter" tire is not possible unless I pay another $2,690. 83 for four more "wheels and winter tires". I drove the vehicle for two months on their "summer tires" bridgestone turanza t005 summer tires. On two separate occasions with less than one inch of snow on the ground, I totally lost control of the car while braking. My wife refused to ride again with me with the tires that came with the car. I finally went back in and had to purchase from them four new sotozero3 winter tires and four new wheels. I now have 8 new tires and 8 new wheels. My complain is with Audi, not the dealer. Selling or leasing these vehicles with summer tires only in a geographical area that experiences winters such as suburban chicago, is a disaster waiting to happen. Audi needs to be stopped before someone dies. Thank you!.

Vacuum pump oil leak (06j145100g). 76k mi, found via multi point inspection on 10/25/18 (Audi of honolulu). Vehicle prod date: 07/2012, engine code: caeb, transmission: 0bk, quattro awd. The vacuum pump, located at the rear of the engine is leaking motor oil. Either the internal seals of the pump or gasket is faulty. Motor oil is leaking onto the exhaust, transmission, firewall insulation, engine belly pan, transmission mounts/crossmember, transmission belly pan, and lower rear of engine. Under moderate braking, white smoke would appear from under the hood (pressure forcing the oil through the pump seals, which then leaked onto the exhaust. ) braking power is sometimes diminished due to lack of vacuum power to brake booster (air leak). After shutting off engine (after normal driving), a burnt smell would appear (whole carport would smell). Est cost of parts + labor, $1k(Audi of honolulu). Vehicle is less than 10 years old and out of warranty. I'm highly concerned of a potential fire hazard and reduced braking ability.

See attached memo.

See all problems of the 2006 Audi A6 🔎.

A few times when slowly gliding to a stop (red light or stop sign) when stepping on the brake pedal it seems to go to the floor and needs to be pumped in order to stop. It's a scary situation. I cannot make it happen. It didn't seem to happen until I had the brake fluid changed during routine maintenance at Audi. I reported the problem to dealer where the work was done and they said that they redid the fluid change but the problem has re-occurred a couple of times. Also, it seems that when sitting in the car with it idling I can just about press the brake pedal to the floor.

Audi brake guard activated spontaneously because the car sensed an impending impact with a vehicle in front of me. However, there was no vehicle in front of me, but the brake guard applied strong braking action on an open road, bringing me to an immediate stop. Had there been a car behind me, it would have likely hit my vehicle, since I came to a sudden stop on an unobstructed roadway for no reason.

See all problems of the 2015 Audi A6 🔎.

While driving 60 mph on the freeway, the car accelerated on its own to 72 mph as if going into cruise control. Confirmed the cruise control switch was turned off. Applied the brakes seven times. Car did not respond to braking. Engine seemed to race against the brakes. I put the car in neutral, moved to side of the road. Applied the hand brake. Turned key off. Car slowed then stopped. Since this incident the car was test driven twice by mechanics, during which it seemed to operate normally. On January 27, 2015 the car was taken to the local dealer, bellevue Audi, for diagnosis. Awaiting results.

See all problems of the 1999 Audi A6 🔎.

With the elec stability control being intermittent this is being caused by the abs module going bad/intermittent the brake pedle pressure changes. I have experienced this with my 2002 ram 1500 (4x4) as well. This could be a problem in all cars and trucks. The cost the fix for an Audi is around $2500. 00 and my ram was $1300. 00.

On 2 separate occasions I had to pay for a parking brake module or motor. The cost was 900. 00 both times. I google this and found more complaints about this same issue.

See all problems of the 2005 Audi A6 🔎.

I was driving my car in my work parking lot when a loud beep occurred and my car issued a warning for "parking break malfunction. " two lights, esc and abs also lit up when the beep sounded. I immediately stopped driving, engaged the parking brake (which worked) and disengaged it. I am the second owner of the car and after some research found that the brake module and mmi both had been upgraded by the previous owner. I continued to witness these symptoms and am waiting for my dealership to run a diagnostic. I have read enough consumer complaints about this specific problem to know that Audi should take a deeper look into it.

The contact owns a 2008 Audi A6. The contact stated while traveling approximately 60 mph, he attempted to decelerate but the brakes seized. The contact also mentioned that smoke and extreme heat emitted from the front brakes. The vehicle was taken to the dealer who stated that the rotors needed to be replaced. The vehicle was repaired but the failure recurred. The vehicle was returned to the dealer and the abs system was replaced. The manufacturer was notified of the failure. The failure mileage was 65,000.

See all problems of the 2008 Audi A6 🔎.

Audi 2005 A6 started to have intermittent warning for abs, stability, hand brake at ~55k miles. Took car to dealer to diagnose it . Dealer called with an estimate of $2800 to replace abs module. He also provided an estimate of $1100 for another error code for airbag to replace the center rear seat belt. I'm not understanding why these warning codes come so randomly and clear so randomly. Not sure why an Audi A6 will need such repairs that clearly point to flaws in design and unreliable parts after only 55k miles. There are tons for online complaints from Audi drivers that use the bosch 8. 0 abs module. Audi should either recall this part or offer to pay for the repairs. When I complained to Audi USA, basically they asked if I was first owner and if I take it to dealer for maintenance. The answers for both is no. I'm the 2nd driver. Bought the car with only 20k miles and since relocating to houston, I take the car to a local garage for oil change. I'm looking for safecar. Gov to rectify the issue with Audi. Audi doesn't even sell the abs module part alone. You will have to buy the brake pump as well.

Tl- the contact owns a 2003 Audi A6 2. 7 quattro. The contact stated while traveling 20 mph the abs system activated causing the vehicle to veer to the left. The vehicle was able to be driven to the contact's home. The vehicle was taken to an independent mechanic. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 89,000 and the current mileage was 90,500. Pmb.

See all problems of the 2003 Audi A6 🔎.

Parking brake malfunction light on. Dealers found park brake switch was faulty.

Faulty abs module.

The contact owns a 2002 Audi A6. While driving approximately 40 mph, the abs engaged suddenly and then the vehicle went back to normal function. The failure occurred intermittently. The vehicle had not been inspected or repaired. The failure mileage was approximately 78,000 and the current mileage was 83,787.

See all problems of the 2002 Audi A6 🔎.

Electromechanic parking brake broke 6 times in 4 years. A few times the brake won't disengage, having to literally drag the car on a platform to be able to take it to the dealer. Since the first event I've never used the parking brake on purpose (the car is automatic) to avoid another malfunction but it would still break every few months. It's either the motors or wiring or both. It never happened to me while driving but dealer warned me that it could. The reason I'm filing the complaint is that it is not an isolated case. A quick google search "Audi parking brake malfunction" will prove that the problem is widespread and it makes me think that they should have issued a recall but they didn't.

2000 Audi a-6 quattro 2. 8 l; abs module has malfunctioned. This seems to be a common occurrennce on these vehicles as I've seen numerous people complaining about it on the Audi forum.

See all problems of the 2000 Audi A6 🔎.

Abs control module has failed on my 2000 Audi A6. From an internet search this appears to be an almost taken for granted repair/replacement item, I. E. ; it happens to almost every vehicle. This is not an inexpensive item to replace (500-1300 dollars including labor). There are thousands of complaints, forums, blogs dedicated to this particular issue. I believe a recall is warranted. Please investigate this issue. Thank you.

Faulty abs system in Audi A6 2000 model.

Abs control unit is faulty on my Audi A6 2003. I believe it is subject to recall indicated by the $1800 repair and frequency of this complaint on the internet.

The vehicle shimmied severely when the brakes were depressed.

See all problems of the 2001 Audi A6 🔎.

Consumer stated while traveling on wet roads the brakes become soft. Once dry, the brakes grab. The consumer stated the front and rear brakes were replaced several times.