2012 Audi A4 Fuel System problems

Upon having 3 consecutive oil changes, my car suddenly began to burn oil (no leaks) after the first oil change upon driving less than 900 miles. Then the second oil change did the same thing upon driving under 300 miles. It actually ran out of oil totally. I added oil as instructed by the car, and it burn the oil withing 250 miles of driving. I took it to the dealer, who acknowledge that this model and year had the wrong engine put in the vehicle. They would need to replace the entire engine at my cost, with...

I recently purchased my 2012 audi a4 after a few weeks the check engine light came on after taking my car to have it diagnosed I was told ( system was to lean in bank 1) I was told I needed a new o2 system, light never went off and I was told next that their was a leak in a vacuum seal and lastly my coolant level was depleting at a rapid speed and I was told that their was a leak from the water pump.

Only five minutes after starting car in morning, engine rapidly lost power and quit completely while in 60 mph traffic on heavily traveled interstate 526 in charleston, sc. Coasted car out of traffic lanes to side, a very dangerous location on elevated roadway. Had car towed to audi dealer, who said they tested and found fuel pump had failed. They replaced fuel pump and engine seems to run normally now. In four decades of driving I've never had a fuel pump fail. This one put my wife and me in jeopardy due to the sudden and complete loss of engine power in middle of fast, heavy traffic. We were lucky to get out without being hit by oncoming trucks & traffic. *Tr