2007 Audi RS4 Problems: 1 Issues Every Owner Should Know
2007 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2007 Audi RS4 has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $800 to $1,500. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 2007-2008 Audi RS4 4.2L FSI V8, the B7 Audi RS4 with the high-revving 4.2L FSI V8 develops significant carbon deposits on the intake valves due to direct fuel injection. This high-performance engine is particularly affected because of its FSI system design.
Common Symptoms
- Power loss
- Rough idle
- Misfires especially at idle
- Hesitation at low RPMs
- Decreased throttle response
How to Fix
Confirm carbon buildup by scanning for misfire/fuel-trim faults, checking measuring blocks for airflow/load deviations, and inspecting the intake valves with a borescope after removing the intake manifold. The proper repair is intake-valve carbon cleaning, typically by walnut-shell blasting each intake port with the valves closed, then replacing the intake manifold gaskets, injector seals if disturbed, and cleaning the intake flaps/throttle body before clearing adaptations and performing a road test. On the B7 RS4, this service is commonly needed every 30,000-60,000 miles depending on driving style and fuel quality. Typical independent-shop cost is about $800-$1,500, while more extensive service with manifold flap work, injectors, or additional seals can push the total higher.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeBluetooth OBD-II scanner for reading engine codes and monitoring live data (BlueDriver Bluetooth OBD2 Diagnostic Scan Tool)
- UpgradeQuality synthetic oil and filter combo for engine maintenance (Mobil 1 Full Synthetic Oil and Filter Bundle)