Car Problem Reports
Audi A8 Quattro Overheating Due to Failing Thermostat
Audi A8 Quattro Problem
Engine Affected: 4.2L V8
Average Mileage: 95,798 mi (24,000 mi - 175,000 mi)
Visitor, 2004 Audi A8 Quattro, 4.2L V8, 75,000 mi
Engine suddenly overheated significantly without any previous warning or coolant leakage. Failed thermostat replaced.
Visitor, 2004 Audi A8 Quattro, 4.2L V8, 24,000 mi
Thermostat failed closed
Visitor, 2002 Audi A8 Quattro, 4.2L V8, 116,500 mi
Check engine light. Codes said failing thermostat. $871 to fix. Recommended same time do the timing belt, serpentine belt, and water pump with the thermostat, quote, $2065.
Visitor, 2000 Audi A8 Quattro, 4.2L V8, 165,000 mi
Check Engine light on...told by local mechanic that thermostat is stuck open (or so I'm told)...also told it's very expensive to fix, since the whole front end needs to come off to get to it...no fix done.
I had my Audi A8 Quattro 4.2L Parked in my heated garage for 6 weeks i drove it out and after about 15 miles it started running above normal temperature i had to turn the interior heater on to maximum to get the temp back to normal my audi main agent said i needed a new water pump and thermostat at a cost of £1675.53 i was not happy this obviously must be a manufacturers design fault i mean you would not think a £57000 car would need a water pump and thermostat after a mere 26000 mile and it is not soughted yet as i think Audi should rectify the problem or at least meet part of the cost.
Visitor, 2004 Audi A8 Quattro, 4.2L V8, 118,480 mi
It just started to overheat.
Visitor, 2005 Audi A8 Quattro, 4.2L V8, 140,000 mi
Engine overheats unless heater is on HI. Not yet repaired looking for a reasonable and qualified repair technician
Visitor, 2000 Audi A8 Quattro, 4.2L V8, 117,089 mi
Car periodically seems ( per the gauge ) to be running too warm
Now the check engine light came on
Mechanic told be previously that it's an expensive job to fix and just get used to topping off the coolant from time to time
Visitor, 2005 Audi A8 Quattro, 4.2L V8, 68,000 mi
Thermostat stuck in closed position, engine overheated. Dealer replaced thermostat. In order to do so had to remove timing chain and water pump to get at thermostat. Replaced timing chain and water pump as long as it was all torn apart. Expensive repair for a thermostat. Thought they normally failed in the open position!
Visitor, 2004 Audi A8 Quattro, 4.2L V8
The the 2004 A8L with 64,500 suddenly overheated. I drove it home (about 3-4 miles) quickly and will bring it in or have it towed in for service tomorrow.