Alternatively you can look under the water pump area to see if there is dried or even fresh coolant residues. If it’s not the thermostat housing issue, then you will need to look at radiator or even check your oil to make sure if it’s the water pump gasket problem. Reply Like. 10-31-2021, 02:15 PM. # 3. Ihave the same problem on audi a4 b8 2012 (facelift). I buy 3 years old car. I change thermostats (both) and sensors (both). on the odometer shows always the same temperature (on the 1 post.) then I look odometers on the ebay and on the car (audi a4 2003) and a6 2009. the position of the temperature (cold engine) start at 50 C. .

audi a4 b8 thermostat problems