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BMW 740Li Serpentine Belt Replacement

A serpentine belt is a modern drive belt or fan belt, and replacing it is a quick service with a cost that varies depending on your car.

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Average Shop Price $428
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BMW 740Li Serpentine Belt Replacement

RepairSmith offers upfront and competitive pricing. The average cost for BMW 740Li Serpentine Belt Replacement is $120. Drop it off at our shop and pick it up a few hours later, or save time and have our Delivery mechanics come to you.

Car
Location
Quoted on
Price
2015 BMW 740Li
3.0L L6 Turbo Base • 57,000 miles
El Monte CA 91732
Nov 23, 2020
$104 - $128
2015 BMW 740Li
3.0L L6 Turbo Base • 94,000 miles
Sacramento CA 95811
Nov 12, 2020
$104 - $127
2015 BMW 740Li
3.0L L6 Turbo Base • 16,000 miles
La Mesa CA 91943
Nov 7, 2020
$99 - $121
2013 BMW 740Li
3.0L L6 Turbo Base • 28,000 miles
Costa Mesa CA 92626
Oct 27, 2020
$107 - $131
2013 BMW 740Li
3.0L L6 Turbo Base • 106,000 miles
Redwood City CA 94061
Oct 27, 2020
$102 - $124
2012 BMW 740Li
3.0L L6 Turbo Base • 15,000 miles
Sacramento CA 95830
Oct 26, 2020
$99 - $121
2014 BMW 740Li
3.0L L6 Turbo Base • 106,000 miles
Orange CA 92863
Oct 23, 2020
$119 - $145
2012 BMW 740Li
3.0L L6 Turbo Base • 110,000 miles
Danville CA 94506
Sep 25, 2020
$117 - $143
2013 BMW 740Li
3.0L L6 Turbo Base • 90,000 miles
Fontana CA 92334
Sep 23, 2020
$111 - $135
2014 BMW 740Li
3.0L L6 Turbo Base • 50,000 miles
Santa Ana CA 92706
Sep 16, 2020
$112 - $136
Last Updated:
Jan 21, 2021 4:52 PM
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What is a Serpentine Belt?

Don’t worry, it’s just a name for a car part. Though I'm sure there have been cases of snakes popping out from under the hood. A serpentine belt is a modern drive belt or fan belt. It’s responsible for transferring rotational force from the engine to different components in the car. You think the alternator magically turns on its own? What about the air conditioning compressor or the power steering? Nope, nope, and nope. The serpentine belt takes rotational force generated by the engine, and doles it out to those systems. And it does so in a pretty simple manner. The belt is made of rubber, and looks exactly like a belt. It wraps around a series of pulleys, one for each system that it drives. As the belt snakes (hence the name) around all of the pulleys, each system is given the rotational force it needs. The belt itself is driven by a pulley attached to the crankshaft. So, as the engine works, it turns the crankshaft pulley, which sets the serpentine belt in motion, which turns everything else. Not all cars have serpentine belts. Some cars have multiple drive belts, with each belt only turning a few pulleys. If a car only has one drive belt, then it’s a serpentine belt. Unlike traditional drive belts, serpentine belts don’t need to be adjusted, because they automatically do so. And they’re more durable, too. But they can crack and break, and when they do, they’ll need to be replaced.

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Symptoms of a broken Serpentine Belt

Check engine light comes on

Look, I know the check engine light seems so insignificant. Well, it isn't. The check engine warning light is actually pretty important. If your car’s serpentine belt is failing, then systems will stop working, your car’s computers will be alerted, and the check engine light is likely to come on.

Dead battery

Here’s something I don’t need to tell you: If your car won’t turn on, you might have an issue. The serpentine belt is responsible for driving the alternator, which is responsible for charging the battery. If the belt fails, the battery won’t be charged, and eventually, it will run out of juice. Depending on your car, you may see a low battery charge warning light before the battery is fully dead. As previously mentioned, pay attention to those warning lights.

Loss of power steering

The serpentine belt also runs the power steering system on some cars. If you’re driving and turning the steering wheel makes you feel like you haven’t hit the gym in a while, you’ve probably lost your power steering. The serpentine belt can also help power the power braking system in some cars, so if you find it hard to brake, that may be a belt issue as well.

Overheating engine

In many cars, the serpentine belt drives the water pump, which is what gets the coolant in action. If the water pump can’t do its job, you may not have a cooling system, which means your engine is liable to operate at way too high of a temperature. Your car has an engine temperature gauge on the dashboard. I know I sound like a broken record here, but listen to the warning on your dash.

Visibly worn belt

If you don't spend your free time under the hood of your car, no judgement here. But if you do, and you notice that the serpentine belt is rigid, cracked, or ripped at all, then out with the old and in with the new.

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How urgent is a Serpentine Belt replacement?

Depends. Do you want an engine that overheats, a battery that dies, and a lack of power steering?

If you said “yes” to that, we’ve got bigger issues on our hands than your car. But if you said “no”, then you know what to do.

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