Audi 100 Quattro Car Thermostat Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(25)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(25)

Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a Audi 100 Quattro Car Thermostat Replacement is $177 with $82 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1991 Audi 100 QuattroL5-2.3LService typeCar Thermostat ReplacementEstimate$279.53Shop/Dealer Price$338.17 - $474.70
1992 Audi 100 QuattroV6-2.8LService typeCar Thermostat ReplacementEstimate$282.95Shop/Dealer Price$346.85 - $495.16
1989 Audi 100 QuattroL5-2.3LService typeCar Thermostat ReplacementEstimate$259.53Shop/Dealer Price$318.20 - $454.75
1994 Audi 100 QuattroV6-2.8LService typeCar Thermostat ReplacementEstimate$282.95Shop/Dealer Price$346.80 - $495.08
1993 Audi 100 QuattroV6-2.8LService typeCar Thermostat ReplacementEstimate$282.95Shop/Dealer Price$346.88 - $495.21
1990 Audi 100 QuattroL5-2.3LService typeCar Thermostat ReplacementEstimate$259.53Shop/Dealer Price$318.20 - $454.75
Show example Audi 100 Quattro Car Thermostat Replacement prices

What is an engine cooling system thermostat and how does it work?

The car's engine cooling system thermostat is a small valve within a cooling system passageway that opens and closes in response to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the closed position, circulating the coolant flow only within the engine instead of flowing to the radiator, which allows the engine to warm up fast, promoting fuel efficiency, low emissions, and reduced engine deposits. Once the engine coolant reaches the design temperature, usually around 195 degrees, the valve will open and close as you drive in order to maintain a coolant temperature typically between 195 to 225 degrees Fahrenheit.

Thermostat

When to consider replacing the engine cooling system thermostat:

  • Engine overheats. A thermostat with the valve stuck closed is a common cause of engine overheating. However, since there are other causes of overheating, a mechanic will thoroughly inspect the cooling system prior to condemning the thermostat. Since it is usually not known how badly the engine overheated, the mechanic will also try to determine if there is evidence that the cylinder head gasket was blown. If so, it would be repaired prior to replacing the thermostat.
  • Temperature gauge reads too low or too high. Thermostats can get sticky, causing the engine temperature to stray from the optimal range. Your dash-mounted temperature gauge will notify you of this malfunction.
  • Cooling system repairs. All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown.

How do mechanics replace the engine cooling system thermostat?

  • Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
  • The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement.
  • All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
  • The thermostat housing bolts are tightened to original equipment manufacturer (OEM) specifications using a calibrated inch-pound torque wrench.
  • The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air.
  • The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun. This will confirm the thermostat is open. Finally, the engine is checked for leaks.

Is it safe to drive with an engine cooling system thermostat problem?

No. If it has been determined that there is a thermostat problem, it should be repaired right away. Failure to do so can cause substantial and costly damage to the engine.

When replacing the engine cooling system thermostat keep in mind:

  • Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
  • The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown.
  • OEM thermostats are the best ones to use and you can request your mechanic to install only the OEM thermostat. Dealer supplied, OEM thermostats are sometimes more costly but are generally higher quality and specifically engineered for your car.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating

(25)

Rating Summary
20
4
0
0
1
20
4
0
0
1

Richard

21 years of experience
461 reviews
Richard
21 years of experience
Audi TT L4-2.0L Turbo - Thermostat - Mableton, Georgia
Very profesional and knowledgeable. Great mechanic.

Theodore

16 years of experience
1587 reviews
Theodore
16 years of experience
Audi TT L4-2.0L Turbo - Thermostat - Woodinville, Washington
It is really a pleasant to have Theodore to take care of my issue. After 5 fours of his hard work, my problem has gone and the car is all right after that.

Edmar

22 years of experience
246 reviews
Edmar
22 years of experience
Audi S5 V6-3.0L Turbo - Car Thermostat Replacement - Flower Mound, Texas
Great background to work on my Audi. Friendly, prompt great work

Ben

18 years of experience
114 reviews
Ben
18 years of experience
Audi A4 Quattro V6-2.8L - Thermostat - Arvada, Colorado
Experience was great. On time and very convenient.

Excellent Rating

(25)

Rating Summary
20
4
0
0
1
20
4
0
0
1
Number of Audi Car Thermostat Replacement services completed
275+
services done by our mechanics
TOTAL NUMBER OF EXPERT Audi MECHANICS
700+
experts on our platform

Recent articles & questions

A Buyer’s Guide to the 2012 Mercedes Benz S400 Hybrid
When When you expect your vehicle to show everyone that you have truly arrived, while being greener than some of the other luxury options, the 2012 Mercedes Benz S400 Hybrid needs to be on your list. Add in the fact...
2014 Jeep Cherokee vs. 2014 Jeep Wrangler: Which One Should I Buy?
SUVs are a crowded market, but Jeep has long been a name to remember. SUVs are generally built on the chassis of a truck and provide the overall handling of a truck instead of feeling more like a car that...
How Long Does an Instrument Voltage Regulator Last?
Having Having a fully functional instrument cluster is important due to the information that it gives you about the operation of your engine. With all of the different things that can go wrong with your instrument cluster, you will have...

How do I add oil to the engine?

Without the right level of oil in the engine, bad things will happen. Engine oil lubricates and reduces friction, ensuring that your engine runs smoothly. If the level is low, though, you’ll start to notice that the engine runs rough,...

Transmission goes into reverse but not drive.

This is likely a sign of low transmission fluid. I would recommend checking the fluid first to see if this does not fix your issue. If this does not solve the problem, this may be a faulty transmission control solenoid....

Is it safe to drive a car that is surging(###) ###-####rpms for a little over 2 hours?

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com