Auxiliary Battery Replacement at your home or office.

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$196.59 - $295.12

Price range for all vehicles


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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
2012 Volvo S80 $273 $193.06 $79.99 9% $300.56
2007 Dodge Nitro $205 $124.97 $79.99 11% $232.47
2011 Hyundai Equus $227 $146.72 $79.99 10% $254.22
2011 Lexus RX450h $357 $277.40 $79.99 7% $384.90
2014 Cadillac XTS $227 $146.86 $79.99 10% $254.36
2007 Porsche Cayman $281 $201.11 $79.99 8% $308.61

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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

5,510

Rating Summary
5,302
121
31
16
40
5,302
121
31
16
40

Rafael

26 years of experience
9 reviews
Rafael
26 years of experience
Kia Rio - Battery - Richmond, California
Rafael was on time and very efficient. His notes were very detailed. I scheduled the service on garbage day (oops) and I don’t have a driveway but he made it work even moving trash cans so. I will definitely book with him again!
Ford Explorer - Battery - El Sobrante, California
Rafael, was excellent....he did everything to protect the safety of all....he was masked and gloved during the entire repair. Great, Safe service.

Bobby

26 years of experience
50 reviews
Bobby
26 years of experience
Ford Focus - Battery - Charlotte, North Carolina
Knowledge of car super Went to work completed work in a timely manner Excellent service THANK YOU
GMC Terrain - Battery - Charlotte, North Carolina
Mr. Bobby provided exceptional customer service and got the job done! I couldn’t have asked for a better person for the job!

Pierre

8 years of experience
46 reviews
Pierre
8 years of experience
Toyota Corolla - Car Battery Replacement - Boston, Massachusetts
Pierre was awesome! He was on time, knowledgeable, and went above and beyond my requested service. I would highly recommend his services! Thanks Pierre!
Honda Fit - Car Battery Replacement - Arlington, Massachusetts
Very good experience. He changed a dead battery, replaced air filters and did an oil change. Very happy with the work.

Travis

12 years of experience
82 reviews
Travis
12 years of experience
Porsche 911 - Battery - Charlotte, North Carolina
Professional, friendly, knowledgeable, smart, fast, focused, engaging. He knew exactly what he was doing and did a 5 Star job. First time using your service. Totally impressed and a lot less money than the dealer. Will have you take care of all of my cars.

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 (855) 347-2779 · hi@yourmechanic.com