Symptoms of a Bad or Failing Alternator Belt

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Cost of Replacing a Bad or Failing Alternator Belt

A failing alternator belt can cause the Battery Light to turn on, dimming or flickering lights in the car, and engine stalls. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Alternator / Serpentine Belt Replacement . Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2008 Scion tC $108 $38.38 $70.00 25% $145.88
2009 Dodge Ram 2500 $108 $38.38 $70.00 25% $145.88
2007 Saab 9-7x $208 $137.94 $70.00 15% $245.44
2009 Mercedes-Benz E350 $114 $44.38 $70.00 24% $151.88
2006 Cadillac DTS $89 $19.18 $70.00 29% $126.68
2011 Porsche Cayman $112 $42.01 $70.00 25% $149.51
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How to Diagnose a Bad or Failing Alternator Belt?

alternator belt

Keeping a car’s battery charged is the job of an alternator. Without this key piece of equipment, the battery would die after only a short amount of driving. In order for the alternator to keep charging, it will have to continue to spin. This spinning is made possible by the belt that runs from the pulley on the alternator to the crankshaft. The belt does a very specific job and without it, the alternator will not be able to provide the constant charge the battery needs when the car is running.

The longer that the same alternator belt is on the car, the higher the risk will be that it has to be replaced. The type of belt around your alternator will depend solely on the make of your vehicle. Older cars will use a V-belt for the alternator while newer cars will use a serpentine belt.

1. Battery light is on

When the battery light on your instrument cluster comes on, you will need to pay attention. While this light does not tell you exactly what is wrong with your car’s charging system, it is the first line of defense in getting the issues addressed. Taking a look under the hood is the best way to see if a broken alternator belt is the cause of the battery light being turned on.

2. Dimming or flickering interior lights

The lights on the inside of your car are used primarily during the nighttime hours. When there are problems with the charging system, these lights will usually flicker or become very dim. A broken belt will prohibit the alternator from doing its job and can be the cause of the lights on the interior of your car becoming dim or flickering. Replacing the belt is essential in restoring the lights back to normal.

3. Engine stalls

Without a properly working alternator and alternator belt, the power that the car needs will not be supplied. This means that when the battery dies out, the car will be rendered unusable. Having this happen on the side of a busy road or highway can create a lot of problems. Getting the alternator belt replaced is the only way to get the car back on the road quickly.

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Recent Alternator / Serpentine Belt Replacement reviews

Excellent Rating


YourMechanic Alternator / Serpentine Belt Replacement Service

Average Rating

4.6/5

Number of Reviews

220

Rating Summary
214
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214
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3

Theodore

13 years of experience
726 reviews
Theodore
13 years of experience
He's come to service my car twice and i have an appointment with him to come this week. He's great. Highly recommend him.
2003 LEXUS RX300 - ALTERNATOR BELT - RENTON, WASHINGTON

Brad

11 years of experience
3 reviews
Brad
11 years of experience
Brad was very professional and got right to work and replaced the belts. Great service! I would hire Brad again.
2006 NISSAN SENTRA - ALTERNATOR BELT - LAS VEGAS, NEVADA

Jeff

30 years of experience
438 reviews
Jeff
30 years of experience
He is one mechanic that knows his way around cars and I will recommend him to everybody I can think of very knowledgeable very fast nice guy to work around but knows his job I’m very impressed with his work
2005 DODGE STRATUS - ALTERNATOR BELT - SACRAMENTO, CALIFORNIA

Henry

31 years of experience
80 reviews
Henry
31 years of experience
This was the 2nd time we used Henry to do some work on our Jeep, and again he was wonderful. He arrived when he said he would and he had the job was done in a timely fashion as well....and more importantly the job was done right the first time! He even was kind enough to move his truck out of the driveway so my son could play basketball-thanks Henry!
2005 JEEP GRAND CHEROKEE - ALTERNATOR BELT - SICKLERVILLE, NEW JERSEY

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