2007 Audi A6 Quattro Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2007 Audi A6 Quattro

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2007 Audi A6 Quattro Problems

No Start after Refueling and Popping Noise from Trunk

Popping sounds from the rear of the vehicle may be heard moments after starting the engine, or when slowing to a stop. This noise is from the leak detection pump filling the fuel tank with air, and releasing to retest the system when it finds a fault. The sequence of faults identifying this issue are as follows:

  • Succession of loud pops from rear of vehicle
  • Pops go away, and fuel economy decreases 
  • Check engine light illuminates
  • OBD trouble code P2404 and/or P0441 is stored
  • Engine will not start after refueling (must crank for over 30 seconds)
  • Vibration when slowing to a stop

The cause is a valve which is mounted on the front of the intake manifold, commonly called the N80 valve, or EVAP system purge valve. The valve is designed to open under specific circumstances, but a worn valve will remain open at all times, preventing the pressurization of the fuel tank. 

Correction of the issue is to replace the N80 valve with the latest revision. 

Check Engine Light and/or Engine Overheating Due to Failed Thermostat

The thermostat may erratically stick open or closed. The can result in illumination of the Check Engine Light and/or engine overheating.

Inspect 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.

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2007 Audi A6 Quattro Questions

headlight issues. "adaptive light defective" (2 answers)

problem icon lights up when i start auto and pops up during the day several times.
I think its the front passenger headlight.

How do I get my key out of the ignition. (2 answers)

My car turns on, drives, parks, etc. The problem I'm having is the key doesn't come out when we shut it off. I have tried turning the wheel back and forth, turning the car on and off, pulling the key and even called road services to see if they would know what to do.

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2007 Audi A6 Quattro Reviews

Rated
based on 1 customer reviews
Love my 2007 3.2 A6 Quattro... bought it with 45k and just passed the 66k mark. Its a great car.

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