Skip the auto shop - Our mechanics make house calls

Q: Serpentine belt broke

asked by on

My Serpentine belt broke while driving and battery light came on. Drove 15 miles before i arrived home and shut car off. Tried to restart but it the battery was dead. Woke up in the morning car started just fine. I let the car run without driving and After about 7 mins car died again not completely. I shut it off and tried to restart and it was like the battery was dead. Its the orginal serpentine belt from mfg. So its 120,000 miles in. All pulleys seemed to be fine prior as i lifted my hood and never hear squeaks or see signs of the belt tensioners needing to be replaced. Should i still replace all belt tensioners? Is this a Sign of a faulty alternator?.

My car has 120000 miles.
My car has an automatic transmission.

A: Hello. Yes, the idler pulley and tensioner ...

Hello. Yes, the idler pulley and tensioner should be replaced with the serpentine belt. The bearing in the idler pulley wears out over the miles and the tensioner weakens with use as well.

This is not a sign of a faulty alternator. The battery is capable of running engine electronics for a short distance and you were probably most fortunate to get home before that occurred. I am very surprised you did not have an overheating event, as the serpentine belt also drives the water pump. Driving any distance (let’s say a mile) usually causes severe overheating.

If you would like to have this checked, a certified professional from YourMechanic can come to your car’s location to replace the serpentine belt and any other repair that is needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What Are Common Signs That Your Drive Belt Is Loose?

A loose drive belt will often be noisy, squeaking a bit, or emitting a high-pitched squeal. The most obvious sign of a loose drive belt, though, is in its appearance and tension. A loose belt, simply stated, looks and feels...

Q: 2006 Audi brake pedal hard replaced booster with no results

To begin with the booster needs a vacuum source. You said you replaced the line, but there is a check valve in the line, it is probably installed at the booster end of the line. It looks like just an...

Q: Starting Problems

Hello, thanks for writing in about your Honda Element. From what you've described, the problem you're having sounds like an issue with the ignition switch. When it is turned it is losing contact. I would suggest having a certified technician,...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.