6 Electrical Issue. Electrical is another issue that can cause an Audi A heater not to work properly. If there is an electrical problem with the heater, it can prevent the heater from getting power. If you have an issue with the electrical system, you can try to repair or replace it. 7. OverheatingAnd Overcooling. Overheating is the most common symptom of a failing thermostat. Due to corrosion or aging, your car’s thermostat can get stuck in a closed position. If this happens, the thermostat will not let the coolant reach the radiator, and, as mentioned above, the engine will overheat, causing severe damage. Theprice of car parts within the category Coolant thermostat for A4 B8 ranges from £7 to £55, depending on the manufacturer and product specifications. Top AUDI models: Coolant thermostat A3, Thermostat A6, Coolant thermostat A5, Thermostat TT, Coolant thermostat A1, Top Automaker: Coolant thermostat BMW, Thermostat VW, Coolant Thiswill show you the Audi A4 1.8T 1.8 thermostat location. Get Audi parts here: Car Guy Supply Guide: https://www.amazon.com/shop Istill have my B8 A4 Allroad, 75k miles. I'm going to put it through it's MOT next month then it's got to go. I however have an issue that I want to resolve before selling it to avoid any issues with a prospective new owner. The cooling system. The car had a new timing belt and water-pump last Andsometimes run fine no problems turn the engine off, when restarted it starts doing it. Is there a second sensor I'm missing? My CAR is a Audi A4 B6 2001 sedan, live in norway 2005 a4 3.0, new water pump, thermostat, audi coolant and temperature sensor by firewall getting a random p2181 code still. System bled, temp A41.8T B6 overheats. I have had a problem where the temp gauge in the car have been sitting at 0 since I baught it. The coolant temperature gets reportet properly if I connect VCDS so I think it is only the gauge that is faulty. Lately I have also had some problems with the cooling fan as it goes to max right after I start the car, even if it Inline thermostat 2.0 Diesel Common rail engines on VAG group of carsFind the items that are used on the Dave Sterl channel in the Amazon shop. https://www. 2008Ibis White A4 s-line manual -Sold. 10-27-2020 01:14 PM #4. brandonbanana. Saw another guy on Audi world with a RS5 with the same issue last week. - - - Updated - - - Audi techs changed the water pump and thermostat thinking that was the problem. After the techs contacted the engineers, they realized the coolant AudiS4/A4/A4 Cab (B8 Chassis) . M. michaelcrxvt Registered User hi, i have a 2009 audi a4 2.0 tdi quattro 170bhp caha engine and it very rarely gets up to temperature. I’ve always wondered if my thermostat is nakered but thought that my cars running fine so I’ll leave it. It doesn’t seem like there’s an easy and definite way to ccic.