I was exiting off of the interstate and the car began to sputter. I had to cut 3 cars off to pull onto to the shoulder, where the car continued to lose power and eventually died. A gearbox malfunction warning light came on, but said it was still safe to drive. I was able to get me car into park and start. After sitting for a few minutes I went on my way, however, the car sputtered again out of 1st gear but smoothed out once I got going. The light remained on the remainder of the trip but didnt come back on the next morning. I called Audi usa to explain what happened and they acted like they never heard of such a thing happening and said it was okay to drive. I have only had this car for 6 months and that gearbox malfunction has now happened 3 times, the latest of which almost caused an accident. I have called a couple mechanics, including a local Audi dealership, and have been informed that its a bad mechatronics unit and that it is extremely common for my particular year, model and type (there is a tsb for it). Worst of all, it will cost me $5000 + to repair. I bought this car 6 months ago from a large, well respect dealership as a certified pre-owned, with 75,000 miles. I also purchased an extended warranty that will not cover it. Im not sure what to do.

- Greenwood, IN, USA

Engine - excessive oil consumption (1qt refill is require for every 750miles). Dsg transmission ' getting gearbox malfunction, you can continue to drive on dashboard. This is due to P179E - drive range sensor electrical error.

- Plano, TX, USA

I was accelerating, after leaving a restaurant, into traffic. I received the "dsg malfunction light" and suddenly at about 20mph my lurched forward and failed to respond to the throttle and shut off in traffic. Car restarted after about 30 seconds but definitely not something that should go without notice. If I was on the interstate and throttle went out situation could have been much worse.

- Atlanta, GA, USA

Audi recently replaced my 2nd thermostat (1st was 11/2012 and the 2nd was 11/24/2014), not under warranty, and returned my car to me after holding onto my car for two weeks. I was told that my vehicle checked out okay via a diagnostic and mechanics review. I drove my S4 for two days and while driving, I received an indicator warning that read, gearbox malfunction reverse not available, you can still drive. I then noticed that the car began to violently buck when I accelerated. The car surged forward while driving in traffic which was alarming to both my 10yr old daughter and I. other cars had to drive around us and one vehicle almost hit my car in the rear. I continued to drive at a limited speed and immediately, the TPMS warning indicator lit up and the car lost speed. The car would barely move at 10 mph and I limped back to a relatives underground parking garage. Once I parked I could not get the car to reverse out of the parking space. I called Audi and they stated that I would have to tow the vehicle to the nearest Audi service center. The vehicle was towed to Audi and I am waiting to hear the results of their findings. I have already invested over $1,750 in vehicle repairs (thermostat and rear brakes/rotors). I do not want to continue to invest money into this vehicle pit. Audi needs to recall these faulty parts (thermostat and mechatronic) and stand behind their product. I've seen numerous complaints in forums and on this site referencing these same issues.

- Augusta, GA, USA

There is a well known issue with the Audi 3.ot engine's plastic thermostat failing! I was driving and the thermostat failed causing the engine temp to skyrocket to "H"! I drove home because I was close enough with the heater on high. They flatbeded my car on 9/29/14 from my driveway to the Audi dealership. Dealership determined it was a failed thermostat and replaced it with another "plastic themostat." The second thermostat failed 2 days later. I just took the car to the Audi dealership again this morning 10/3/14 to have it replaced again! this part needs reengineered because its plastic and will fail at some point. Thank god I wasnt out of state with my family and it failed because I would have been stranded!

- Wexford , PA, USA