Mercedes-Benz S400 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 S400 Drive Belt Tensioner Replacement is $190 with $95 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2012 Mercedes-Benz S400V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$381.99Shop/Dealer Price$466.24 - $679.62
2011 Mercedes-Benz S400V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$284.67Shop/Dealer Price$349.62 - $505.03
2010 Mercedes-Benz S400V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$284.67Shop/Dealer Price$349.62 - $505.03
2013 Mercedes-Benz S400V6-3.5L HybridService typeDrive Belt Tensioner ReplacementEstimate$361.99Shop/Dealer Price$446.23 - $659.60
Show example Mercedes-Benz S400 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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Scott

36 years of experience
898 reviews
Scott
36 years of experience
Mercedes-Benz S400 V6-3.5L Hybrid - Check Engine Light is on - Chandler, Arizona
On time. Quick diagnostics.

Joe

23 years of experience
85 reviews
Joe
23 years of experience
Mercedes-Benz S400 V6-3.5L Hybrid - Auxiliary Battery Replacement - Fort Worth, Texas
Very polite. Knew what he was doing.

Joseph

27 years of experience
578 reviews
Joseph
27 years of experience
Mercedes-Benz S400 V6-3.5L Hybrid - Cabin Air Filter Replacement - Houston, Texas
Grt as usual!!!

Richard

20 years of experience
126 reviews
Richard
20 years of experience
Mercedes-Benz S400 V6-3.5L Hybrid - 110,000 Miles Maintenance Service - Weatherford, Texas
Very efficient and polite gentleman.. knew what he was doing.

Excellent Rating

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