One problem related to emission control has been reported for the 1999 Audi Quattro. The most recently reported issues are listed below.
Check engine light comes on intermitantly. Egv valve needs to be replaced. The car has only 50 k miles on it. Cost: $ 1500. No car should need an egv (emission control device) replaced after only 50 k miles. Audi will not cover cost of replacement!.
| Emission Control problems | |
| Engine problems |