Lexus GS400 Car Thermostat Replacement at your home or office.

Our certified mechanics come to you・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Logo-yelp
CUSTOMERS LOVE US ON YELP
4.5 out of 5 (550 reviews)
Icon-warranty_badge-02
SERVICES BACKED BY OUR
12-Month, 12,000-Mile Warranty
How does YourMechanic work?    
Icon-quote-hiw
Get a quote

Choose from 600+ repair, maintenance, and diagnostic services, backed by our 12-month, 12,000-mile warranty.

Icon-calendar-hiw
Book an appointment

Tell us when to meet you at your home or office. We’ll send one of our vetted, top-rated mechanics.

Icon-fixed-hiw
Get your car fixed

Continue with your day while our mechanic fixes your car onsite. You pay only after the job is done.

Car Thermostat Replacement Estimate for Lexus GS400

Lexus GS400 Car Thermostat Replacement costs $119 on average. Following is a breakdown of the labor and parts estimates.

YourMechanic Price
$119 to $129
Labor: $70 -$80
Parts: $49
Average Dealer price
$191
Average Shop price
$145
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
1998 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.06 - $310.71
2000 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.18 - $310.92
1999 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.10 - $310.78
Show example Lexus GS400 Car Thermostat Replacement prices

Car Thermostat Replacement Service & Cost

What is the Thermostat all about?

A thermostat is part of the cooling system that regulates the temperature of the coolant in the engine. The thermostat is a metal valve that has a temperature sensor built in. It can either be open or closed. When the thermostat is closed, it keeps the coolant in the engine. When the engine gets to a predetermined temperature, the thermostat opens allowing coolant to circulate. The circulation of coolant prevents the engine from overheating. If the thermostat fails to open, the car will overheat. If the thermostat fails to close, the engine may never reach the optimal temperature (~220F). The thermostat opens and closes many times when the car engine is running. It is the most common component in the cooling system to fail, causing the car to overheat.

Thermostat

Keep in mind:

  • The entire cooling system should be inspected when the thermostat is replaced.
  • When the thermostat is replaced, the gaskets and housings should be cleaned thoroughly.

How it's done:

  • Scan the computer in the car for codes.
  • Verify that the car is overheating.
  • Remove and replace thermostat if it is faulty.
  • Clean old gasket surfaces.
  • Remove corrosion from housings/hose connections.
  • Fill cooling system.
  • Check for leaks and proper operating temperatures.

Our recommendation:

Have the thermostat replaced anytime you have major work done on the coolant system.

What common symptoms indicate you may need to replace the Thermostat?

  • Engine overheats.
  • Car heater does not work.
  • Check Engine light is on.

How important is this service?

A vehicle’s engine gets extremely hot, and in order to avoid overheating, it needs to be properly cooled. The engine is cooled by a viscous liquid called coolant. The coolant is circulated around the engine, where it absorbs heat, which allows the engine to remain at a safe temperature. A fan then lowers the temperature of the coolant, which allows it to run back through the engine once more. The thermostat is responsible for determining when the coolant needs to enter the engine. The thermostat determines the temperature of the engine, and then acts as a valve that allows coolant in, or keeps coolant out. When the engine is too cold, the thermostat keeps coolant out; when the engine is too hot, it lets coolant in.

When the thermostat stops working, it will either get stuck open or closed. If the thermostat is stuck open, the coolant will constantly flow through the engine, absorbing too much heat, and the engine will never reach optimal running temperature. If the thermostat is stuck closed, the coolant will never circulate through the engine, and your engine will quickly overheat, which can cause severe damage.

Fast and easy Car Thermostat Replacement service at your home or office.

GET A QUOTE FOR YOUR CAR
Backed by 12-month, 12,000-mile guarantee

Meet some of our expert Lexus mechanics

Real customer reviews from Lexus owners like you.

415 reviews
Robert
27 years of experience
Likable and Expert Mechanic. Showed up on time. Installed a timing belt kit (all belts, water pump, idlers, and tensioner) within the estimated time. I look forward to using Robert again for any other work I need on my cars.
2004 LEXUS ES330 - TIMING BELT REPLACEMENT
410 reviews
Joe
39 years of experience
Excellent experience with Joe. He's very fast, knowledgable and above all, trustworthy.
2011 LEXUS IS250 - OIL CHANGE
284 reviews
Alex
12 years of experience
Booked Alex to replace all brake pads, front and rear. Upon inspecting the front pads, Alex stated they were fine and didn't need replacement. Saved me some money! This is the 2nd time I've used YourMechanic, and I appreciate the service more and more.
2003 LEXUS RX300 - BRAKE PADS REPLACEMENT (REAR)
184 reviews
Jose
12 years of experience
Really did not have the proper tools to do this job. He certainly tried his best but was unable to replace the passenger side axle shaft.
2007 LEXUS IS250 - AXLE / CV SHAFT ASSEMBLY REPLACEMENT (DRIVER SIDE FRONT)
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing
Get a quote
CarServiceYourMechanic PriceShop/Dealer Price
1998 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.06 - $310.71
2000 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.18 - $310.92
1999 Lexus GS400V8-4.0LService typeCar Thermostat ReplacementYourMechanic Price$168.12Shop/Dealer Price$218.10 - $310.78
Show example Lexus GS400 Car Thermostat Replacement prices

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.

1-800-701-6230 · hi@yourmechanic.com