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.
Resources for the Repair and Maintenance of your 2004 Audi A4
2004 Audi A4
2004 Audi A4 Problems
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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.
The water pump may fail resulting in engine overheating and possible timing belt damage. Overheating and/or timing belt failure can result in very expensive engine repairs. As a precaution, it is recommended to inspect the timing belt and water pump at regular intervals.
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.
2004 Audi A4 Recalls (Recent)
2004 Audi A4 Questions and Answers
What is the cost to change the transmission control unit?
Where is the Tranmission control Module located in the Audi A4 (non quattro) 2004 and is it some that can be repaired or rebuilt with having to buy a new one.
Where is the Engine Speed Sensor located?
In my Audi in the panel that shows what gear you have the car in is blinking. For a example in the PRND12 this is blinking all the time. I am leaking windsheild fluid out of my reservior what would...
2004 Audi A4 Reviews
just got this car approximately 3 months ago. apparently the TCM is bad. the transmission is very weak and driving at 30 mph the damn car is already on 6th gear. very weak on take off ynless i hit the gas pedle all the way. and even then the transmission is confused. durinig automatic down shift the car transmission kinda bumbs as it goes into first gear. sounds like the TCM (transmission control module) very annoying. the repair is very pricy. only 90 thousand miles. Audi should take resonsibility for this cause this problem happens to alot of their vehicles. especialy the A4