Auxiliary Battery Replacement at your home or office.

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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.

YourMechanic Price
$143 to $387
Labor: $70 -$152
Parts: $73 -$235
Average Dealer price
$239 to 647
Average Shop price
$175 to 452
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Battery Replacement for 1998 Chevrolet P30 V6-4.3LYourMechanic Price$188.90Shop/Dealer Price$233.14 - $333.21
Battery Replacement for 1986 Buick Somerset L4-2.5LYourMechanic Price$186.70Shop/Dealer Price$230.46 - $328.93
Battery Replacement for 2014 BMW M5 V8-4.4L TurboYourMechanic Price$260.97Shop/Dealer Price$345.07 - $515.57
Battery Replacement for 2014 Chevrolet Malibu L4-2.4L HybridYourMechanic Price$216.41Shop/Dealer Price$267.57 - $388.30
Battery Replacement for 2007 Honda Odyssey V6-3.5LYourMechanic Price$197.55Shop/Dealer Price$243.97 - $350.52
Battery Replacement for 2010 Mercedes-Benz R350 V6-3.0L Turbo DieselYourMechanic Price$275.89Shop/Dealer Price$353.56 - $523.68
Battery Replacement for 1984 Ford E-250 Econoline V8-5.8LYourMechanic Price$198.14Shop/Dealer Price$244.78 - $351.84
Battery Replacement for 2003 Chevrolet Silverado 3500 V8-6.0LYourMechanic Price$186.70Shop/Dealer Price$230.46 - $328.92
Show example Auxiliary Battery Replacement prices

Auxiliary Battery Replacement Service & Cost

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.

Fast and easy Auxiliary Battery Replacement service at your home or office.

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Meet some of our expert mechanics

Real customer reviews from owners like you.

331 reviews
Jamahl
15 years of experience
Jamahl was very pleasant, professional and highly competent. Will surely be booking him in the future. Many thanks!
2011 FORD ESCAPE - BATTERY REPLACEMENT
Want Jamahl's expert advice? Ask your question now. Its free!
283 reviews
Jason
12 years of experience
Jason Made Sure I Knew What was going on with my car, most mechanics don't explain they just tell you what's wrong he walked me through the process and explained step by step why each procedure he does is important. Very friendly, takes his time, and makes sure you as a customer is satisfied with his work and if there isn't anything that you don't understand he will gladly walk you back through the process. I would definitely be using his services again in case there is another problem. Thank you so much Jason you did a great job dude!
2009 MAZDA 6 - BATTERY REPLACEMENT
Want Jason's expert advice? Ask your question now. Its free!
186 reviews
Isai
22 years of experience
Perfect and professional . He explained what was going on and took extra effort to diagnose the parasitic drain and how to address the problem. New battery, system testing and helpful guidance. I am going to book him for all my future work on our cars. Next is tuneup on my wife's car
2007 HUMMER H3 - BATTERY REPLACEMENT
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23 reviews
Genaro
8 years of experience
Genaro was amazing, extremely professional, and did thourough work on my car. On time or earlier to my appointments, and was flexable when my work schedule got crazy.
2002 NISSAN XTERRA - BATTERY REPLACEMENT
Want Genaro's expert advice? Ask your question now. Its free!
Get an instant quote for your car
Our mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%
Get a quote
ServiceYourMechanic PriceShop/Dealer Price
Battery Replacement for 1998 Chevrolet P30 V6-4.3LYourMechanic Price$188.90Shop/Dealer Price$233.14 - $333.21
Battery Replacement for 1986 Buick Somerset L4-2.5LYourMechanic Price$186.70Shop/Dealer Price$230.46 - $328.93
Battery Replacement for 2014 BMW M5 V8-4.4L TurboYourMechanic Price$260.97Shop/Dealer Price$345.07 - $515.57
Battery Replacement for 2014 Chevrolet Malibu L4-2.4L HybridYourMechanic Price$216.41Shop/Dealer Price$267.57 - $388.30
Battery Replacement for 2007 Honda Odyssey V6-3.5LYourMechanic Price$197.55Shop/Dealer Price$243.97 - $350.52
Battery Replacement for 2010 Mercedes-Benz R350 V6-3.0L Turbo DieselYourMechanic Price$275.89Shop/Dealer Price$353.56 - $523.68
Battery Replacement for 1984 Ford E-250 Econoline V8-5.8LYourMechanic Price$198.14Shop/Dealer Price$244.78 - $351.84
Battery Replacement for 2003 Chevrolet Silverado 3500 V8-6.0LYourMechanic Price$186.70Shop/Dealer Price$230.46 - $328.92
Show example Auxiliary Battery Replacement prices

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