Faults:

Water ingress through bulkhead.

Injection pump at 11k (under warranty thank heavens!)

Window regulator and gear linkage at 15k. The central locking then went haywire which I still think was something the dealer did fixing the window.

Slight clutch judder noticeable at 18k. Got progressively worse until the dealer found a cracked flywheel and broken spring in the clutch. Warranty claim was over UKP 1400!

Power steering rack leaking at 26k.

Started pulling to left under braking - seized rear caliper.

General Comments:

Well finished, comfortable, surprisingly lively and exudes a certain "class".

Great cruiser, beautifully designed and executed interior, low noise levels (apart from the crude sounding grumble from the engine when accelerating) and astonishingly economical. Returned over 50 mpg on a run.

Sadly it was also easily the most unreliable car I've ever owned. Over UKP 2,500 in warranty claims in 2 years and 26,000 miles. The 130,000 mile Mondeo I had before was more dependable (if not as nice to drive) and had just one fault in all the time I had it (from 30k). To make matters worse, Audi dealers were very rude and I was made to feel that I was nitpicking when reporting faults.

Finally at breaking point, I sold the A4 last year and did what I should have done in the first place. Bought a BMW 320d which has so far been faultless and is a much sharper drive.

After years of reliable (but uninspiring) service from Fords, Vauxhalls and the like, the A4 was the car I always promised myself. It was bad enough that the car turned out to be rubbish, but to be treated with contempt by dealers was something even Ford didn't stoop to (theirs were merely indifferent.) Despite doing it "properly" and buying approved used (at barely less than an internet broker's "new" price), this car was a dream turned into a nightmare.

I won't be buying another Audi, or VAG group product come to that.

Faults:

Nothing so far.

General Comments:

I love this car, It has what I was looking for: class, excellent interiors, beautiful and distinguish body lines. Comfort and performance. Technology and art with taste. I own also a motorcycle so I required a beautiful car not only transportation. Audi A4 meets my expectations.

Faults:

Check engine light 6 times. Would come on again right after driving away from the dealer after supposedly fixing it.

Muffler needed re-welding.

Brake lights keep blowing out. Has happened two or three times.

Radio stops working, first they said it was a fuse, then they confessed that the radio had to be recalled and replaced. radio stopped working three times.

Horn stops working (driver side). This has broken twice.

Sun roof does not close properly, gets stuck open or it gets stuck while closing. This has happened intermittently even thought the shop said they fixed it.

Seat heating switch gets stuck and can't turn it.

Power windows sometimes open when you push the button to close them.

Windshield wiper blades had paint peeling off.

Left signal light burnt out several times.

Wipers would go halfway and then stop. Frame seized, wipers torn.

Cup holder does not spring back.

Oil leak from cam shaft adjuster seals.

Wipers torn again.

Speakers on passenger and driver door crackling and cutting in and out needed wire cleaning.

Compass on mirror not reading properly or very slow response.

General Comments:

Nice looking car, nice to sit in, the controls are all in the right and comfortable places for my size. However, many problems right from the very first day of purchase. The car is in the dealership at least once every two months on average. Many problems are repeats and the service center keeps fixing them, but not solving the problems. During the warranty period the service center just keeps fixing the car, but the same problems keep coming back.