I want to start this thread to see what kind of problems people have with their B5 1.8T. So far Myself, I had the following problem :

The most recent one - cost CDN$2000
- ABS Control Unit was shot, needs to be replaced
- Oil leak around oil cooler unit
- Head light spray nozzle needs to be replaced
- Secondary air injection hose

Previous One - CDN$700
- Needed new gasket for rear differential
- needed new gasket for for valve cover

Older record - cost unknown
- Tranny slipping, replaced entire tranny under warranty, the dealership claimed that the tranny cost AOA CDN$14000
- Door doesn't open - some mechanical issue with the inside panel
- Radio (Symphony II) was replaced
- Fuel tank lock - Pressure unit rusted out, unit will not unlock
- Secondary air injection valve - stay open, replaced under warranty
- Oil pump - Vehicle consistenly reports low oil while there is oil
- Heated seat - Gets extremely hot even set to 1 (though could be a good thing for the winter here )
- Vaccum hose - Wear and tear

 

So... In Sept. 2005 I bought a used lease vehicle, a 2001 A4 1.8t quattro. 48,000 miles, 1 owner and all factory services done up to about 40,000 that I have record of. Car fax was squeeky clean. Since then I have replaced 1 starter... part was covered by reseller, labor $120.00 not bad, not audi either. The doosy pending repair... My main wiring harness is falling apart on top of the cylinder head that feeds the ignition coils, this is at 58,000 miles, would think factory would help with repair as this really shouldnt wear out. NOT, current estimate is $1.5K to 2K to replace. also an oxygen sensor, part is $449.00, also a cam/distributor timing sensor Maybe $350.00 to replace. I paid $16,300 for the car. At this rate I will have paid as much in repairs as ive paid for the car in just a few years. Im still trying to get some help with the harness issue but its not looking good...AUCH!!!!!!!!!!(ouch)

 

sounds like you have some major problems but that is one really exspensive 02 sensor

 

Those are the prices quoted by Audi, I think the o2 sensor is price installed. Totally looking for a decent service mechanic in Santa Cruz Ca. to help with the things Im not gonna do myself.