BMW 745Li 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

(35)

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

(35)

Car Thermostat Replacement Service

How much does a Car Thermostat Replacement cost?

On average, the cost for a BMW 745Li Car Thermostat Replacement is $475 with $153 for parts and $322 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2002 BMW 745LiV8-4.4LService typeCar Thermostat ReplacementEstimate$662.60Shop/Dealer Price$753.62 - $994.06
2003 BMW 745LiV8-4.4LService typeCar Thermostat ReplacementEstimate$641.88Shop/Dealer Price$725.78 - $960.89
2005 BMW 745LiV8-4.4LService typeCar Thermostat ReplacementEstimate$712.28Shop/Dealer Price$813.89 - $1101.87
2004 BMW 745LiV8-4.4LService typeCar Thermostat ReplacementEstimate$712.28Shop/Dealer Price$813.88 - $1101.86
Show example BMW 745Li 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 BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(35)

Rating Summary
34
0
0
1
0
34
0
0
1
0

Joel

15 years of experience
1142 reviews
Joel
15 years of experience
745Li 2005 - Clear fluid is leaking - Jacksonville, FL
Joel seem like the right guy to fix my car

Stephen

20 years of experience
50 reviews
Stephen
20 years of experience
745Li 2004 - Lubricate Trunk - Mount Pleasant, SC
Mr. Moton is a kind & respectful man, punctual, and knowledgeable of all makes & models of vehicles. He is also a distinguished U.S. military veteran. This was our second vehicle service from YourMechanic. Mr. Moton performed an oil change (including oil filter & 3 o-rings), engine coolant temperature sensor replacement, & trunk/steering/etc. lubrication on our BMW 7-series vehicle...the tasks were performed properly and in a timely manner. 'YourMechanic' is a convenient service as the mechanics come to you (home or designated place) to repair your vehicle and the cost of parts, labor, etc. is less than what a dealership, independent repair shop, etc. would charge for the same services + you interact directly with the mechanic performing all work on your vehicle vice a 'go-between' salesperson, 'service representative', 'service manger', etc...who are not the actual mechanics. Dealerships and other repair shops have overhead expenses, such as real estate/rent, utilities (electric, water, gas, etc.), additional employees (managers, sales/service representatives, etc.), parts inventory, heavy/light equipment, tools, etc. and those costs are passed on to the consumer just to keep their operations afloat. The 'YourMechanic' business model removes many of those additional business expenses into a simple online scheduling & service system + the local mechanics, which = lower costs for the consumer and a more personalized/convenient 'house call' vehicle service. Hope this helps...thank you.

Stephen

20 years of experience
50 reviews
Stephen
20 years of experience
745Li 2004 - Lubricate Steering and Suspension - Mount Pleasant, SC
Mr. Moton is a kind & respectful man, punctual, and knowledgeable of all makes & models of vehicles. He is also a distinguished U.S. military veteran. This was our second vehicle service from YourMechanic. Mr. Moton performed an oil change (including oil filter & 3 o-rings), engine coolant temperature sensor replacement, & trunk/steering/etc. lubrication on our BMW 7-series vehicle...the tasks were performed properly and in a timely manner. 'YourMechanic' is a convenient service as the mechanics come to you (home or designated place) to repair your vehicle and the cost of parts, labor, etc. is less than what a dealership, independent repair shop, etc. would charge for the same services + you interact directly with the mechanic performing all work on your vehicle vice a 'go-between' salesperson, 'service representative', 'service manger', etc...who are not the actual mechanics. Dealerships and other repair shops have overhead expenses, such as real estate/rent, utilities (electric, water, gas, etc.), additional employees (managers, sales/service representatives, etc.), parts inventory, heavy/light equipment, tools, etc. and those costs are passed on to the consumer just to keep their operations afloat. The 'YourMechanic' business model removes many of those additional business expenses into a simple online scheduling & service system + the local mechanics, which = lower costs for the consumer and a more personalized/convenient 'house call' vehicle service. Hope this helps...thank you.

Patrick

26 years of experience
1550 reviews
Patrick
26 years of experience
745Li 2004 - Water Pump - Pflugerville, TX
Patrick is by far the first mechanic I have felt was truly there to help

Excellent Rating

(35)

Rating Summary
34
0
0
1
0
34
0
0
1
0
Number of BMW 745Li services completed
385+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform

Recent articles & questions

How Long Does a Trunk Lock Cylinder Last?
A A car has a variety of different safety features that will allow them to keep would be thieves at bay. Among the most beneficial of these safety features are the locks that you have on your doors and on...
How to Deal With a Car Battery For Long-Term Storage
If If you store your car for the winter, or for other long periods, it’s important to make sure that your car battery is properly cared for. Long term car storage can wreak havoc on your battery. Isn't it okay...
How to Replace a Brake Hose
Modern Modern cars use a combination of metal lines and rubber hoses to contain and transfer the fluid that applies your brakes. The lines coming out of the brake master cylinder are made of metal to be strong and long...

If I change the battery on a 2008 Acura RDX will I need to do anything besides swap out battery?

There is a lot of memory lost when you change the battery. The radio might need to be re-coded and the power windows and sun roof may not work correctly until you do a re-set. The car may also not...

Cannot remove radiator hoses from heater core fittings

Hi Brett. Thanks for sending us your question today. The first thing I'd do is refer to Jeep's repair and service manaul, to determine if they recommend any specific tools or procedures for this job. The heater core coolant tubes...

I have a Ford Fusion 2011 and I'm getting a message on my dash saying, "[power steering](/topics-power-steering/) assist fault". I can drive the car, but turning requires effort.

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