2005 Audi A4 Quattro Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2005 Audi A4 Quattro

Vacuum leaks, oxygen sensor failure, and catalytic converter efficiency faults can cause the Check Engine Light to illuminate.

A problem with the torque converter can cause the Check Engine Light to illuminate.

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.

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My car used to change gear very quickly but i will like to know if a bad high pressure fuel pump can affect the transmission performance

Need brake pads replaced.

Acts like not getting fuel. checked fuel filter nothing wrong. what could be causing this? Thank you.

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