hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
64,544 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Audi S4 engine problems

engine problem

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2004 Audi S4 Owner Comments

problem #3

Nov 182008


  • 94,000 miles


Car engine was misfiring - was informed a faulty coil pack was causing the issue. One week later the misfires started again. Two more coil packs were replaced. 2 weeks later another misfiring episode. Car died at intersection so was towed in for inspection. Camshaft adjuster/cam guides had failed. Parts were replaced for 5K and then 2 weeks later cylinder 3 failed when valve and piston interacted - car died again on the highway. Car engine is going to need total engine replacement.

- Mazomanie, WI, USA

problem #2

Mar 132009


  • 67,641 miles
I got in my car this past Friday to leave for work and then my car starts rumbling and sounds like what can best be described as a muscle car. I only live a mile from my office so I drive my car in. While driving it seems like the car has lost low end power and is still idling with a rumble. When I get to work I pop the hood and notice the entire motor shifting back and forth and my buddy sees my exhaust is moving up and down. So I decide to get it to the local garage that has worked on my car before. He is only about 2 blocks down from my office. When I pull out from my parking lot the car throws a cel and about 500 ft from the garage it starts flashing. So I coast the car into the garage and get the codes read. They're coming up as cyl. 4, 5, 6, and 7 misfires and P0021 cam timing adjust bank 2 not reached. So the mechanic clears the codes and takes the car around the block and once again the cel comes on and this time it says cyl. 1,3,7, and 8 misfiring and the P0021 code for the cam timing and also a new code P1317 bank 2 cam/crank angle sensor wrong combo of ECU's....to make a long story short the car was towed over 100 miles away to the nearest Audi dealer and was diagnosed as having a faulty cam tensioner. The whole motor needs to be removed and tore apart and the tensioner replaced. The bill is $6286.18. My car is a 2004 Audi S4 with only 67,000 miles on it and I just purchased it about 5 months ago. It is not under warranty.

- Port Angeles, WA, USA

problem #1

Feb 222008


  • 31,992 miles
2004 Audi S4, build date 09/03 : 1. 24 Aug 06- 16,500 miles- A/C stopped working- replaced entire A/C system (compressor, hoses, pipes, drier, restrictor) under warranty. 2. 10 Apr 07- 23,253 miles- car won?T start- starter replaced under warranty. Pealing shift knob (chrome surround was pealing and the edges were like a razor blade), replaced under warranty. Center console latch broken- replaced under warranty. 3. 22 Feb 08- 31,992 miles- engine replaced due to faulty valve seat. Seat broke allowing valve to be sucked into cylinder and then punched out the side of the block. Engine replaced under warranty. 4. 10 Sep 08- 37,448 miles- A/C stopped working. High pressure switch replaced under warranty.

- Las Vegas, NV, USA

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