BMW 645Ci Drive Belt Tensioner 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

(24)

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

(24)

Drive Belt Tensioner Replacement Service

How much does a Drive Belt Tensioner Replacement cost?

On average, the cost for a BMW 645Ci Drive Belt Tensioner Replacement is $270 with $165 for parts and $104 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2004 BMW 645CiV8-4.4LService typeDrive Belt Tensioner ReplacementEstimate$456.59Shop/Dealer Price$558.37 - $820.38
2005 BMW 645CiV8-4.4LService typeDrive Belt Tensioner ReplacementEstimate$434.59Shop/Dealer Price$536.40 - $798.44
Show example BMW 645Ci 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(24)

Rating Summary
20
1
2
0
1
20
1
2
0
1

Davin

27 years of experience
23 reviews
Davin
27 years of experience
BMW 645Ci V8-4.4L - Alternator - Denver, Colorado
Davin was fantastic!! Thank you!

Emmette

36 years of experience
282 reviews
Emmette
36 years of experience
BMW 645Ci V8-4.4L - Power Steering Belt - Stafford, Virginia
Once again Emmette was outstanding! He arrived early and did a great job. I will continue to recommend him to my friends and family

Grzegorz

41 years of experience
473 reviews
Grzegorz
41 years of experience
BMW 645Ci V8-4.4L - Battery - San Francisco, California

Pete

16 years of experience
192 reviews
Pete
16 years of experience
BMW 645Ci V8-4.4L - Check Engine Light is on - Bonita, California
Pete was here on time, very knowledgeable of my BMW, and made me feel comfortable and confident that he would make the repairs correctly. I also was very impressed with his honesty, and he exceeded my expectations. I am very pleased and will call on him (you) next time. I will definitely recommend his service to friends.

Excellent Rating

(24)

Rating Summary
20
1
2
0
1
20
1
2
0
1
Number of BMW 645Ci services completed
264+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

How to Buy Good Quality Long Range Car Lights
Your Your car is equipped with two types of headlight functionality – low beams, which are used for general driving, particularly in areas with streetlights and oncoming traffic, and high beams, which provide long range illumination. Buying quality long range...
How to Get Out of a Sinking Vehicle
Car Car accidents (https://www.yourmechanic.com/article/how-to-survive-a-car-collision-by-joyce-morse) happen every day. While you might know what to do in a fender bender, what do you do if you end up in a body of water in your vehicle? The heightened tension and danger of...
Is Pay-Per-Mile Insurance Right for You?
Chances Chances are you pay the same amount for your car insurance bill each month, unless you make a change to your policy or vehicle. But if you go days (or weeks) without driving, doesn’t it seem unfair that your...

How to remove a front right CV Axle on a 2000 honda passport

Hi there. Removing the CV axle shaft (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-axle-cv-shaft-assembly) on the Passport can be rather tricky if you've never done this before on a similar vehicle. There are over 30 individual steps listed in the Honda service manual, which I'd recommend...

Engine cuts out/off at idle, and cuts out sometimes at steady state (60-70 mph).

Hi there. Check the fuel system for any air in the fuel rail. residual air in the fuel system will cause the engine to randomly cut off. If the fuel pressure is good and there is no air in the...

Hello i have a BMW 428i x drive and today my car sent a charging malfunction message. I went to work and came out and started my car and it cut off on me and now it won’t start. I don’t know what the problem is should i get a new battery or something?

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 (855) 347-2779 · hi@yourmechanic.com