Mercedes-Benz 500SEL Engine Coolant Temperature (ECT) Sensor 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

(5)

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

(5)

Engine Coolant Temperature (ECT) Sensor Replacement Service

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

On average, the cost for a Mercedes-Benz 500SEL Engine Coolant Temperature (ECT) Sensor Replacement is $167 with $72 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1985 Mercedes-Benz 500SELV8-5.0LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$258.95Shop/Dealer Price$312.44 - $433.54
1984 Mercedes-Benz 500SELV8-5.0LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$292.47 - $413.59
1993 Mercedes-Benz 500SELV8-5.0LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$292.47 - $413.59
1992 Mercedes-Benz 500SELV8-5.0LService typeEngine Coolant Temperature (ECT) Sensor ReplacementEstimate$238.95Shop/Dealer Price$292.43 - $413.52
Show example Mercedes-Benz 500SEL Engine Coolant Temperature (ECT) Sensor Replacement prices

What is the Thermostatic Vacuum Sensor all about?

When the engine is started cold, it takes several minutes to reach operating temperature which is when the engine is running most efficiently. Vacuum is created whenever the engine is running and can be used to control one or more auxiliary vehicle options such as heater controls or cruise control, and is also used to control emissions systems such as exhaust gas recirculation, or EGR. It also controls vacuum for the distributor to advance or retard the spark, ensuring the engine runs as smooth as possible. Vacuum is supplied to these systems through hoses routed in the engine compartment. If engine vacuum was supplied to the EGR system when the engine was still cold, the engine would stumble or stall, and would do so until it reached operating temperature.

The thermostatic vacuum sensor is mounted in the intake manifold and uses coolant temperature to determine when the engine has reached operating temperature. Once it has warmed up, the thermostatic vacuum sensor opens and allows vacuum to flow through it to the vacuum-operated functions it controls. If the thermostatic vacuum sensor fails in the open position, it can be difficult to start the engine when it is cold and will run poorly until it warms up. If the vacuum sensor fails when it is closed, it may start properly but will lose power and run poorly at warm temperatures. It will burn fuel poorly, creating higher exhaust emissions that may fail a smog check. The engine light likely will come on when the vacuum sensor fails.

Keep in mind:

  • The thermostatic vacuum sensor is part of an emissions control system and is required to operate wherever emissions or smog regulations are enforced.

  • Any leaks in the vacuum system can mimic the symptoms of a failed thermostatic vacuum sensor. Diagnosis by a professional mechanic is the best way to confirm failure.

How it's done:

  • The vehicle battery is disconnected and the air cleaner top is removed for access
  • The defective thermostatic vacuum sensor is removed
  • The new thermostatic vacuum sensor is installed and the battery is reconnected
  • The engine is started and the thermostatic vacuum sensor is checked for operation
  • The air cleaner is reinstalled, repair is verified and the vehicle is road tested for proper operation

What common symptoms indicate you may need to replace the Thermostatic Vacuum Sensor?

  • The Check Engine light is on
  • Engine runs poorly on initial startup until the engine warms up
  • Engine stumbles, stalls, or has a lack of power when hot
  • Vehicle fails smog check

How important is this service?

The thermostatic vacuum sensor is an important part of the vacuum system that allows the engine to run smoothly and efficiently. If it is not working properly, your engine can stall or not start and you can be stranded in an inconvenient or dangerous situation. Have it checked and replaced by a licensed mechanic as soon as possible.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(5)

Rating Summary
5
0
0
0
0
5
0
0
0
0

Herman

13 years of experience
86 reviews
Herman
13 years of experience
Mercedes-Benz 500SEL V8-5.0L - Ignition Cable (Spark plug wires) - Miami Beach, Florida
I have used his services twice and both times he has done a great job.

Herman

13 years of experience
86 reviews
Herman
13 years of experience
Mercedes-Benz 500SEL V8-5.0L - Spark Plugs - Miami Beach, Florida
As good as it gets.

Theodore

16 years of experience
1617 reviews
Theodore
16 years of experience
Mercedes-Benz 500SEL V8-5.0L - Windows - Seattle, Washington
Excellent service from Theo Arrived on time Explained what he was doing Finished up with review of what he did and anything that needed to be done

Theodore

16 years of experience
1617 reviews
Theodore
16 years of experience
Mercedes-Benz 500SEL V8-5.0L - Windows - Seattle, Washington
Theodore was excellent! He was on time and did what he said. He even worked through a hailstorm!!

Excellent Rating

(5)

Rating Summary
5
0
0
0
0
5
0
0
0
0
Number of Mercedes-Benz 500SEL services completed
55+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Replace an Air Fuel Ratio Sensor
The air fuel ratio sensor fails within a vehicle if the check engine light comes on. Poor engine performance results from oxygen sensor failure.
How to Replace a Speed Timing Sensor
Some signs of a failed speed timing sensor include a Check Engine Light and poor performance. It's also known as the crankshaft position sensor.
How to Replace a Manifold Temperature Sensor
Signs of a failing manifold temperature sensor include rough idling and a rough running engine, and may result in a failed emissions test.

My impala will start but it will not run.

Hey there: Anytime you remove cylinder heads, intake manifold or disconnect the fuel system, it's important to clear any OBD-II error codes that may have been triggered either prior to the removal or after you started the vehicle. The issue...

My 93 Ford Explorer hesitates when opening the throttle, it is very sluggish and acts like it has no power. Then all of a sudden i

You are correct to suspect the MAF with this sort of symptom. The MAF detects the the amount of air entering the motor. If there is a vacuum leak, or more common, if the air boot that connects the MAF...

Had the steering rack replaced and now the steering angle sensor is acting up after a front end alignment.

Hi there. If the codes are coming on for the steering angle due to either the sensor failing or the plug not plugged in all the way. Check the harness on the steering sensor and see if its plugged in....

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 (844) 997-3624 · hi@yourmechanic.com