BMW 128i Coolant Temperature Switch (Sensor) Replacement at your home or office.

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Coolant Temperature Switch (Sensor) Replacement Service

How much does a Coolant Temperature Switch (Sensor) Replacement cost?

On average, the cost for a BMW 128i Coolant Temperature Switch (Sensor) Replacement is $113 with $18 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2009 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$172.89Shop/Dealer Price$204.87 - $261.42
2010 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$152.89Shop/Dealer Price$184.90 - $241.47
2013 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$168.05Shop/Dealer Price$201.35 - $246.06
2012 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$168.05Shop/Dealer Price$201.30 - $245.96
2008 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$152.89Shop/Dealer Price$184.92 - $241.52
2011 BMW 128iL6-3.0LService typeCoolant Temperature Switch (Sensor) ReplacementEstimate$152.89Shop/Dealer Price$184.90 - $241.47
Show example BMW 128i Coolant Temperature Switch (Sensor) Replacement prices

What is the Coolant Temperature Switch (Sensor) all about?

The coolant temperature switch, also called the coolant temperature sensor, is a switch that reads the engine coolant temperature and sends a signal to the engine control module, or ECM, to control other functions of engine operation such as the air-fuel ratio.

It is also called a switch because on some cars, it is used to turn on the engine cooling fan at a specific temperature. This aids in the engine warm-up process as well as keeping the engine at a safe operating temperature.

Keep in mind:

  • The coolant temperature switch is a crucial part of the cooling system. If faulty, it can cause severe internal engine damage due to overheating, incorrect air-fuel ratio, or incorrect ignition timing. It can also cause shorter life to the cooling fan motor or other electrical components of the cooling system.
  • Some vehicles are equipped with a separate sensor to display the engine temperature to the driver via the temperature gauge.

How it's done:

  • The Coolant Temperature Switch is verified that it needs to be replaced. The coolant is drained until the switch is exposed.

  • The defective Coolant Temperature Switch is removed by disconnecting the connector and removing it from the manifold.

  • The new Coolant Temperature Switch is installed into the mounting hole in the manifold and the electrical connector is reconnected. The coolant is then refilled.

  • The Coolant Temperature Switch is tested for operation, codes cleared, and retested to ensure all codes have been resolved.

  • The vehicle is road tested to ensure proper operation of the Cooling System.

Our recommendation:

If you suspect that your coolant temperature switch has failed, have one of our licensed mechanics come out immediately to diagnose the problem.

What common symptoms indicate you may need to replace the Coolant Temperature Switch (Sensor)?

  • Check Engine light on
  • Engine overheating
  • Cooling fan runs intermittently
  • Engine misfires, stalls, or idles roughly
  • Erratic coolant temperature

How important is this service?

This part, when faulty, could cause the fan to run intermittently or not at all, which in turns causes overheating or overuse of the cooling fan motor. Whenever overheating occurs, severe engine damage is a possibility.

The engine air-fuel ratio is what keeps it running smoothly. If the ratio gets skewed, the engine will have poor fuel economy and run poorly or not at all. The coolant temperature switch is important because it gives the ECM the information it needs to make this calculation and run the engine optimally. YourMechanic will be able to tell you if this part is performing correctly.

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Rating Summary
85
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Robert

20 years of experience
1098 reviews
Robert
20 years of experience
BMW 128i L6-3.0L - Smoke from engine or exhaust - Commerce City, Colorado
It was very professional. Showed up early, got right to work and kept me informed.

Jamahl

20 years of experience
830 reviews
Jamahl
20 years of experience
BMW 128i L6-3.0L - Crankshaft Position Sensor - Orlando, Florida
He was very professional and explained what he was doing to fix the issue. He worked very hard to fix the issue and used all of his resources to get the job done. I enjoyed having him come out and work on our car and will look forward to calling him on any mechanical needs we may need for our other vehicles.

Arturo

27 years of experience
303 reviews
Arturo
27 years of experience
BMW 128i L6-3.0L - Brake Pads Replacement (Front) - San Diego, California
It was awesome!! Arturo is great!!

Charles

34 years of experience
342 reviews
Charles
34 years of experience
BMW 128i L6-3.0L - Oil Change - Austin, Texas
Great job

Excellent Rating

(91)

Rating Summary
85
4
1
0
1
85
4
1
0
1
Number of BMW 128i services completed
1001+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

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