Car Problem Reports

Audi A6 Quattro Overheating Due to Failing Thermostat

Audi A6 Quattro Problem
12 Reports
Me Too

Model Years Affected: 2005, 2006, 2007, 2008, 2009, 2010

Engines Affected: 3.0L V6, 3.2L V6, 4.2L V8

Average Mileage: 92,150 mi (47,103 mi - 120,500 mi)


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

  • Visitor, , 3.0L V6, 87,000 mi

    Thermostat is faulty. Was replaced three years ago as part of a factory recall. Problem has resurfaced. Cost is ~ $1,000 because thermostat is located beneath the supercharger and replacement is "labor intensive."

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  • Visitor, , 3.0L V6, 47,103 mi

    While driving the thermostat sign appeared on my dashboard and smoke started to be seen on my hood. Had to park and have it towed to the nearest Audi dealer. The following day the dealer replaced a failing thermostat free of charge covered by my warranty. Just a hassle getting the fixed in between work.

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  • Had the same problem

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  • a6luv, , 3.2L V6, 120,500 mi

    Not overheating, yet... engine light on... shop says need new thermostat...$940 because so labor intensive. Help!!

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