1990 Audi 90 Quattro Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Audi 90 Quattro

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1990 Audi 90 Quattro Problems

Inspect CV Boots and Joints at Each Service

Our technicians recommend having the constant velocity (CV) boots and CV joints inspected at each service. Servicing torn CV boots early can prevent the need to replace the CV half shaft or CV joint.

Abnormal Noise From Suspension

Various bushings—located around the subframe, suspension, and steering—deteriorate with age. A clunking noise when driving over bumps, accelerating, or stopping may be a sign of worn bushings.

Starting problems due to air leaks and fuel injection
Problems with air leaks and the fuel injection may cause starting difficulties.

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1990 Audi 90 Quattro Questions

repair cost of hose that goes into firewall just to the right of the battery, (1 answer)

ACID leaked from outlet spouts of battery onto the hose which overtime ate away the hose // Also Brake and ABS lite sensor come on and beep>

Anyone in Anchorage/AK who can repair a 1990 AUDI 90-Quattro-20v's ODOMETER? (1 answer)

5 years ago the odometer on my 1990 Audi "90 Quattro 20v" suddenly stopped working when the car had only 49K miles. (Yes, only 49K miles, and I'm the car's original owner.) Anchorage's only Audi dealership said the odometer could not be repaired or replaced on that model. ...

crank sensor location (1 answer)

I have a 1988 audi 90 quattro and I'm not sure of the location of the crank sensor. I think it is mounted on the tranny where it mounts up to the engine. The problem is that there are two sensors located there, one is a little bit higher up to the left. Wondering if it is the speed sensor? A...

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