Audi S4 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Audi S4
Verified by mechanics, reported by drivers like you
Ask a mechanic in our community
Never overpay. Check prices with our estimator
Audi S4 ProblemsInspect 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.
A fluid leak may develop from the propeller shaft seal on the rear of the transmission. Our technicians tell us that replacing the seal will commonly correct this concern.
Audi S4 Questions2004 Audi S4 CEL too rich (1 answer)
My 2004 Audi S4 4.2L CEL came on this weekend the codes are p0174 and p0175 system to rich bank 1 and 2. Check air filter and it looks clean, could this be a Mass airflow sensor? What should be my plan of attach or simply just take it into the shop?
Audi S4 RecallsPotential Fuel Leak
The fuel rail is a tube that carries fuel to the fuel injectors. The fuel rail may leak, increasing the risk of a fire. Dealers will replace the affected fuel rail and corresponding seals to correct this concern.
In a crash where the first impact deploys the side air bags and a second impact occurs in the front of the vehicle, the front air bags may not deploy. Dealers will update the air bag control unit software free of charge to correct the concern.