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
2005 Nissan Sentra $134 $63.65 $70.00 21% $171.15
2007 Ford E-350 Super Duty $107 $37.12 $70.00 25% $144.62
2003 Mercury Mountaineer $122 $52.08 $70.00 23% $159.58
2005 Audi Allroad Quattro $256 $32.26 $224.00 31% $376.26
2005 Cadillac XLR $217 $147.28 $70.00 14% $254.78
2010 BMW M5 $184 $72.21 $112.00 24% $244.21
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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.

belts
alternators
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Recent Alternator / Serpentine Belt Replacement reviews

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YourMechanic Alternator / Serpentine Belt Replacement Service

Average Rating

4.6/5

Number of Reviews

275

Rating Summary
264
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Noe

33 years of experience
525 reviews
Noe
33 years of experience
Noe was great. He had to reschedule my initial appointment, but managed to come two hours early to the rescheduled time. Only took him about 20 minutes to finish his work. Would recommend.
2009 TOYOTA COROLLA - ALTERNATOR BELT - KENT, WASHINGTON

William

17 years of experience
118 reviews
William
17 years of experience
Will was very professional and a great guy to talk to. He explained in detail the problems and made it easy for me to understand what was going on. Would highly recommend.
1996 TOYOTA TERCEL - ALTERNATOR BELT - FORT MYERS, FLORIDA

Chris

8 years of experience
223 reviews
Chris
8 years of experience
Chris was timely and knowledgeable, he fixed the issue quickly.
2006 HYUNDAI ELANTRA - ALTERNATOR BELT - PEORIA, ARIZONA

Chris

12 years of experience
312 reviews
Chris
12 years of experience
Great mechanic. On time and no issues. Would recommend to my friends and family
2002 NISSAN FRONTIER - ALTERNATOR BELT - SAN DIEGO, CALIFORNIA

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