Audi A5 Sportback 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 Estimate for Audi A5 Sportback

Audi A5 Sportback Car Thermostat Replacement costs $315 on average.

CarServiceEstimateShop/Dealer Price
2018 Audi A5 SportbackL4-2.0L TurboService typeCar Thermostat ReplacementEstimate$506.87Shop/Dealer Price$621.69 - $922.05
Show example Audi A5 Sportback Car Thermostat Replacement prices

Car Thermostat Replacement Service

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

Charles

4 years of experience
99 reviews
Charles
4 years of experience
Audi A5 Sportback L4-2.0L Turbo - Battery - Hendersonville, Tennessee
Charles did an outstanding job. He did the change out in my battery, was very respectful of my vehicle, very neat and very personable. Well done. Great experience!!!

Joshua

27 years of experience
709 reviews
Joshua
27 years of experience
Audi A4 L4-1.8L Turbo - Thermostat - Danville, California
I would consider using the service again

James

30 years of experience
812 reviews
James
30 years of experience
Audi A3 Quattro L4-2.0L Turbo - Thermostat - Orlando, Florida
Very knowledgeable

Chris

22 years of experience
2124 reviews
Chris
22 years of experience
Audi A4 L4-2.0L Turbo - Thermostat - Irvine, California
Fast and professional job!

Excellent Rating

(25)

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

Recent articles & questions

How to Choose a Hybrid Car With 5 Doors
Hybrid cars are fuel-efficient as they use both gas and electricity. Hybrid hatchbacks and SUVs that have 5 doors offer more cargo and passenger room.
How to Replace Car Heater Hoses
Car heater hoses move coolant from the engine to the heater core and can overheat and break down if there is a coolant leak.
P0394 OBD-II Trouble Code: Camshaft Position Sensor "B" Circuit Intermittent (Bank 2)
P0394 means the camshaft sensor circuit B that is in engine bank 2 produced an intermittent and incorrect voltage reading

Ok it’s making a whining noise now while it is running. It was whining after I drove it for like 45 minutes but now it’s constant. And when I looked under the hood I noticed that my harmonic balancer pulley shakes or becomes misaligned almost (it doesn’t ride straight and true like the other pulleys)

I have a 2012 GMC Sierra 1500 sl crew cab I tried programming a new key fob and it was unsuccessful now the unlock button on the truck doesnt work and when i put the key in the ignition and turn to on nothing happens no lights come on and the car wont start

It’s 7 degrees outside and my car won’t turn on

Hi Bruce. Thanks for contacting us today. In extreme cold temperatures like you've described, many car batteries simply don't have enough cold cranking amps to engage the starter. There really isn't a solution to fix this problem besides jump-starting the...

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