An ignition coil or spark plug may fail unexpectedly resulting in an engine misfire and possible illumination of the Check Engine Light. Vehicles equipped with spark plug wires may also develop a misfire caused by a failed spark plug wire.
Problems for specific Audi A4 years:
Car problem reports
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Most reported Audi A4 problems
Premature wear in various multi-link suspension components can cause noises that are difficult to diagnose. Worn suspension parts can also cause uneven tire wear and create steering alignment problems.
Clogged drains can allow rainwater to accumulate in the plenum tray (at the base of the windshield). The water may leak into the vehicle's interior, brake booster, or electrical components, which can lead to major problems. Our technicians recommend keeping the tray clear of leaves, pine needles, and other debris.
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
The digital display portion of the instrument cluster may fail. Our technicians tell us the entire instrument cluster will need to be replaced to correct this concern.
The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.
The Cabriolet convertible top mechanism can fail due to hydraulic fluid leaks. The fluid reservoir is a common failure.
2007 Audi A4 2.0 turbo needing a quart of oil every 500-800mi under normal/easy driving conditions. The light came on everytime but still not efficient or normal for it to be needing oil. Bought the car Pre-Certified in March 10 and by April 10, it needed a quart of oil. Dealer added oil and sent us on the way. May 10, another quart of oil, dealer fixed it and noted the use may not be correct and wanted to see us in 600-630 miles to check ...
Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.