Mercedes-Benz ML450 Drive Belt Tensioner Replacement at your home or office.

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Drive Belt Tensioner Replacement Service

How much does a Drive Belt Tensioner Replacement cost?

On average, the cost for a Mercedes-Benz ML450 Drive Belt Tensioner Replacement is $351 with $247 for parts and $104 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2011 Mercedes-Benz ML450V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$619.63Shop/Dealer Price$762.17 - $1146.46
2010 Mercedes-Benz ML450V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$597.63Shop/Dealer Price$740.20 - $1124.52
Show example Mercedes-Benz ML450 Drive Belt Tensioner Replacement prices

What is the Drive Belt Tensioner all about?

A Drive Belt Tensioner is a pulley mounted to either a spring mechanism or to an adjustable pivot point that is used to keep constant tension on your serpentine belt. That is the big long belt in the front of your engine.

The tensioner rides on the outside surface of the belt to put pressure, or tension, on the belt and against the pulleys that drive things like the alternator, power steering, air conditioner, etc.

Keep in mind:

Tensioners usually come with pulleys; they are normally replaced together. Also, when replacing a tensioner, the drive belt usually must be removed. A mechanic may recommend replacing the belt as well.

How it's done:

  • Check for any noise in the engine (usually a squeaky or grinding noise).
  • Remove the drive belt(s) (in most cases).
  • Inspect drive belt pulleys.
  • Check the drive belt tensioner.
  • Remove and replace the tensioner if faulty.
  • Start car to see if noise is gone.

Our recommendation:

Your drive belt tensioner should always be inspected when your drive belt is serviced. During routine maintenance and inspection, your drive belt system should be reviewed to make sure that all the components are in working order. The drive belt tensioner will usually last longer than the drive belts, so as long as your tensioner is inspected or replaced when your drive belts are, your belt system should remain in good shape.

What common symptoms indicate you may need to replace the Drive Belt Tensioner?

Unusual noise (squeaky or grinding sound) every time you start the engine.

How important is this service?

The air conditioning, power steering, and alternator in your vehicle are given power through the drive belt. The belt is attached to both the crankshaft and these systems, and transfers power from the engine to drive each of these components. The drive belt tensioner is responsible for keeping the tension in the drive belt, which allows it to continue moving and transferring power. When the drive belt tensioner fails, the tension in the drive belt will begin to diminish, and the vehicle will not operate as well.

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Meet some of our expert Mercedes-Benz mechanics

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Excellent Rating

(43)

Rating Summary
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Tabitha

17 years of experience
319 reviews
Tabitha
17 years of experience
Mercedes-Benz ML350 V6-3.0L Turbo Diesel - Drive Belt Tensioner - San Diego, California
Very knowledgeable and extremely patient.

Chris

22 years of experience
2223 reviews
Chris
22 years of experience
Mercedes-Benz GLK350 V6-3.5L - Drive Belt Tensioner Replacement - Tustin, California
As a first time customer i am very impressed with the service set up. Our mechanic Chriss did a great work in sufficient time. He is very professional and knowledgeable which made me feel more confident in his work.

Tien

23 years of experience
903 reviews
Tien
23 years of experience
Mercedes-Benz E500 V8-5.0L - Drive Belt Tensioner - San Ramon, California

Bernie

52 years of experience
59 reviews
Bernie
52 years of experience
Mercedes-Benz C300 V6-3.0L - Drive Belt Tensioner - Elkins Park, Pennsylvania
Great job 

Excellent Rating

(43)

Rating Summary
41
2
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41
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Number of Mercedes-Benz Drive Belt Tensioner Replacement services completed
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TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
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