logo

BMW 135is Serpentine/Drive Belt 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

(216)

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.

See availability

Customer Ratings

(216)

Serpentine/Drive Belt Replacement Service

How much does a Serpentine/Drive Belt Replacement cost?

On average, the cost for a BMW 135is Serpentine/Drive Belt Replacement is $171 with $58 for parts and $114 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2013 BMW 135isL6-3.0L TurboService typeSerpentine/Drive Belt ReplacementEstimate$252.99Shop/Dealer Price$302.74 - $404.74
Show example BMW 135is Serpentine/Drive Belt Replacement prices

What is a serpentine belt and how does it work?

A serpentine belt is a relatively long, flat, multi-ribbed belt that is driven by the engine’s crankshaft pulley. The belt drives many, and often all, of the engine accessories such as the alternator, air conditioning compressor, power steering pump, water pump, and air pump. The serpentine belt is tensioned by a hydraulic or spring-loaded automatic tensioner. Some older cars use a serpentine belt to drive most accessories but will also have a shorter v-style belt to drive, for example, the power steering pump.

Belts

When to consider replacing the serpentine belt:

  • Regularly scheduled maintenance. Typically, belt manufacturers recommend belt replacement at 90,000 miles. However, the belt must be inspected for wear or damage at regular intervals prior to this high mileage.
  • Squealing noise, belt slippage, visible belt damage. Should the belt fail or wear out prematurely, you may hear noise or you may see visible signs of deterioration such as missing chunks of rubber, excessive cracking, or a shredded appearance on the edge of the belt.
  • Battery Light. A loose belt, perhaps caused by a defective tensioner, may not drive the alternator at adequate speed and thus the battery may discharge, causing the warning light to illuminate.
  • Engine overheating. Often, the serpentine belt drives the water pump. In those applications, if the belt breaks the engine will overheat in seconds to minutes. If the belt is inadequately tensioned, you may notice higher-than-normal engine operating temperature.

How do mechanics replace the serpentine belt?

  • Prior to removing the belt, the mechanic must run the engine to determine if the idler pulley and the belt tensioner are noise-free. Those rotating components have grease filled bearings and are subject to wear. In addition, the mechanic will ensure that all pulleys and accessories are turning in the same plane. These steps help make sure your new belt will operate trouble-free for its full-service life.
  • The belt’s routing path through the various components is noted. The belt tensioner is released, usually with a wrench or lever, to release the tension from the belt. With the tension off, the belt slides off the pulleys.
  • All rotating components — that is the alternator, air conditioner compressor, etc. — are checked for smooth operation and no noise.
  • If everything checks out, the new belt is slipped over all of the pulleys while holding the tensioner away from the belt. Once the belt is centered on all pulleys, the tensioner is released and the installation is complete. The engine is run to ensure normal operation.

Is it safe to drive with a serpentine belt problem?

No. Should the belt have visible damage, you risk unexpected and sudden breakage that could potentially leave you stranded. Serpentine belt problems that result in the alternator not charging may cause the battery to discharge, which will result in loss of electrical power to the vehicle. Additionally, if a deteriorated belt breaks and that belt drives the water pump, the engine will overheat in a matter of seconds.

When replacing the serpentine belt keep in mind:

  • On many cars, the expected service life of a serpentine belt is around 90,000 miles. Should the belt fail well prior to that, a very careful inspection should be performed to check for out-of-alignment pulleys, a possibly out-of-position crankshaft harmonic balancer on which the drive pulley is mounted, binding pulleys, or a defective belt tensioner.
  • Attention should always be given to serpentine belt routing, since proper routing is critical to proper belt tension, and function of the driven components.
  • Sometimes it is difficult to distinguish serpentine belt related noise from other engine noises. In these cases, a mechanic will determine the origin of the noise by momentarily running the engine without the serpentine belt attached.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee

Number of BMW Serpentine/Drive Belt Replacement services completed
2376+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(216)
Rating Summary
205
2
4
1
4
205
2
4
1
4

Theodore

16 years of experience
1587 reviews
Request Theodore
Theodore
16 years of experience
Request Theodore
by Kerry
BMW X5 V8-4.8L - Serpentine/Drive Belt - Sammamish, Washington
Very efficient, repair done quickly

Matthew

10 years of experience
36 reviews
Request Matthew
Matthew
10 years of experience
Request Matthew
by Mohammed
BMW 335xi L6-3.0L Turbo - Serpentine/Drive Belt Replacement - Ballwin, Missouri
Awesome great work

Kenneth

20 years of experience
775 reviews
Request Kenneth
Kenneth
20 years of experience
Request Kenneth
by Nichola
BMW X3 L6-3.0L - Serpentine/Drive Belt - Los Angeles, California
Kenneth was professional pleasant and got the job done. Most important he has passion for his work Which made my experience comfortable and confident the car would take me to Florida safely

Dave

23 years of experience
303 reviews
Request Dave
Dave
23 years of experience
Request Dave
by Dino
BMW 330i L6-3.0L - Serpentine/Drive Belt - San Jose, California
Dave showed up on time. Repair was quick.

Excellent Rating

(216)
Rating Summary
205
2
4
1
4
205
2
4
1
4
Number of BMW Serpentine/Drive Belt Replacement services completed
2376+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

Recent articles & questions

How to Get the Best Fuel Economy in Hot Weather
Let’s Let’s face it: fuel prices continually bob up and down, but gas is never cheap. There are many factors that can affect how much fuel your vehicle uses, which directly affects your pocketbook. With the advent of warmer weather,...
Read more
How to Do a Tire Safety Inspection
Car tires are a big part of staying safe on the road. Check tire inflation, tread depth, and sidewalls to make sure they're in good shape.
Read more
How to Replace a Power Steering Belt
Common signs of a failing power steering belt include a squealing noise and visible cracks, cuts, or nicks on the serpentine or drive belt.
Read more

How do I use the mist feature?

The mist feature allows your wipers to wipe away a temporary amount of water, such as when you drive through a patch of mist. When you use this feature, the wipers will wipe only once. To use the mist feature,...
Read more

Check engine light on, error code P0300, P0302, P0171,

Hi there. Why are you going to replace the O2 sensor? Did testing reveal a problem with the sensor itself? It sounds like there could be an air leak concern or an airflow meter concern. Has anyone checked for cracked,...
Read more

Both front turn signals went out within a day of each other. One is the original bulb for my 2013 Sequoia, the other is a replace

Hello, thank you for writing in. Two bulbs going out at in a short period of time is not unheard of. That is not to say that you do not have an electrical issue. It would not likely be a...
Read more
  1. Home
  2. Estimates
  3. BMW
  4. 135is
  5. Serpentine/Drive Belt Replacement

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

Read FAQ
GET A QUOTE