Auxiliary Battery Replacement at your home or office.

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$179.99 - $291.23

Price range for all vehicles


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Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Auxiliary Battery Replacement.
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How much does Auxiliary Battery Replacement cost?

It depends on the type of car you drive and the auto repair shop you go to. Our mechanics are mobile, which means they don't have the overhead that repair shops have. They provide you convenience by coming to your home or office.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2015 Chevrolet Camaro $234 $154.48 $79.99 10% $261.98
2005 Ford Excursion $196 $115.73 $79.99 12% $223.23
2014 Mazda CX-9 $191 $111.24 $79.99 12% $218.74
2012 BMW Z4 $244 $163.92 $79.99 10% $271.42
2009 Mercedes-Benz R320 $257 $168.84 $87.98 10% $287.09
2004 Ford Mustang $194 $114.41 $79.99 12% $221.91

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Auxiliary Battery Replacement Service

What is the Auxiliary Battery all about?

The vast majority of passenger vehicles on the road today have only a single, large battery. It’s generally located under the hood, although some makes and models have the primary battery in the trunk, near the spare tire. This battery’s job is simple – it provides the electricity needed to start the engine. All other power generated during operation to power the radio, signal lights, and other accessories comes from the alternator.

However, some vehicles (notably higher-end European imports) have more than one battery. There’s the primary battery under the hood, but there’s also an auxiliary battery. These are used to power other systems on the car that require 12 volts of power, and which the alternator is not capable of powering directly. In these instances, the alternator is responsible for charging both the primary and the auxiliary battery. The primary battery delivers voltage during cranking, and the auxiliary battery runs some or most of the car’s accessories.

Like all batteries, auxiliary batteries will eventually wear out or fail. When this happens, they’ll need to be replaced.

Keep in mind:

  • Auxiliary batteries can be checked during maintenance, but it’s necessary to work with a mechanic familiar with the setup of your vehicle.
  • Auxiliary battery failure generally does not prevent you from driving, but it will create complications such as accessory functions not working.
  • Battery size, location, and cost vary drastically from one vehicle to another.

How it's done:

  • The Auxiliary battery is verified that it needs to be replaced. Accessories are removed as needed for access.
  • The defective Auxiliary battery is disconnected and removed.
  • The battery connections are cleaned and the new Auxiliary battery is installed, secured, and connected.
  • Any accessories that were removed for access are reinstalled. The Auxiliary battery is tested for operation.
  • The vehicle is tested to ensure proper operation of the Auxiliary battery.

Our recommendation:

Over time and through normal use, your battery deteriorates. Eventually, it will fail completely. Most have a lifespan of about five to seven years, but this is only an estimate. Once your auxiliary battery fails, it puts a strain on the rest of your system, and some of your accessories may not operate properly or at all. Have the problem professionally diagnosed by one of our expert mechanics as electrical issues can stem from many different problems, not just battery failure.

What common symptoms indicate you may need to replace the Auxiliary Battery?

  • AUX Battery light on in the dash
  • Some or all accessories not working properly

How important is this service?

While a failed auxiliary battery will not prevent your vehicle from driving, it can cause significant complications, including important accessories malfunctioning or not working at all. It can also put additional strain on the rest of your charging system components. Have the auxiliary battery replaced as soon as possible.

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Backed by 12-month, 12.000-mile guarantee


Recent Auxiliary Battery Replacement reviews

Excellent Rating


YourMechanic Auxiliary Battery Replacement Service

Average Rating

4.9/5

Number of Reviews

4,991

Rating Summary
4,794
114
31
16
36
4,794
114
31
16
36

Jason

21 years of experience
177 reviews
Jason
21 years of experience
Mitsubishi Galant - Car Battery Replacement - Nashville, Tennessee
Jason was punctual, and worked quickly to replace my battery. I would definitively recommend him, or reach out to him if i have other problems with my car.
Mercedes-Benz CLK550 - Battery - Franklin, Tennessee
Jason was prompt, courteous and knowledgeable. He communicated with us every step of the way. We still needed further assistance with our problem and he fully explained that to us and also knew some towing services. We were in a parking lot and needed more than mobile equipment could provide. We recommend Jason

Angel

15 years of experience
62 reviews
Angel
15 years of experience
Jeep Cherokee - Battery - Miami, Florida
Angel was very nice and completed the service very fast. He explained everything about what he was doing and about my car. Thank you again and would definitely use my mechanic whenever I need it! Will recommend it to my friends.

Robert

10 years of experience
4 reviews
Robert
10 years of experience
Jeep Wrangler - Battery - Rockville, Maryland
Excellent mechanic and good conversationalist. I found him to be competent and amicable, and given the option would gladly use Robert again

Joe

41 years of experience
703 reviews
Joe
41 years of experience
Chevrolet Corvette - Battery - Tarpon Springs, Florida
Joe showed up on time. He was very courteous and provided the requested service in a professional manner. I would recommend both Joe and your company for my personal auto and for my clients.

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.

1-800-701-6230 · hi@yourmechanic.com