Auxiliary Battery Replacement at your home or office.

Our mobile technicians offer services 7 days a week. Upfront and transparent pricing.

Get an upfront price

Average rating from customers who
received a Auxiliary Battery Replacement.
Learn More

$167.07 - $315.86

Price range for all vehicles


YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

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.
Learn More


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
2009 Ford E-350 Super Duty $182 $112.36 $70.00 17% $219.86
2012 Hyundai Genesis $193 $122.84 $70.00 16% $230.34
2006 Hummer H3 $193 $123.40 $70.00 16% $230.90
2005 Mercedes-Benz S500 $234 $163.92 $70.00 13% $271.42
2004 Mercedes-Benz E500 $234 $163.92 $70.00 13% $271.42
2009 Porsche 911 $234 $163.92 $70.00 13% $271.42

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


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.

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


Recent Auxiliary Battery Replacement reviews

Excellent Rating


YourMechanic Auxiliary Battery Replacement Service

Average Rating

4.6/5

Number of Reviews

3,970

Rating Summary
3,808
95
27
11
29
3,808
95
27
11
29

Terry

28 years of experience
149 reviews
Terry
28 years of experience
On time, professional and completed my oil change and battery replacement in under an hour. While I was at home and not in a waiting room. Will definitely recommend Terry and am now a future customer.
2013 NISSAN ALTIMA - BATTERY - TEMPE, ARIZONA

Chris

8 years of experience
223 reviews
Chris
8 years of experience
Came early but called first to make sure it was ok. Very professional. Very easy to use and work with.
2013 HONDA CR-V - BATTERY - TEMPE, ARIZONA

Alfred

10 years of experience
218 reviews
Alfred
10 years of experience
Alfred was great! He put me at ease right away. That was great because I am a first time "Your Mechanic" customer. Alfred texted me the day before the appointment to confirm it. He texted me the day of the appointment to let me know he was on his way to my home, and that he would arrive on time, He did arrive on time and replaced the battery, and changed the motor oil and filter on my Lexus in a timely manner. I will use "Your Mechanic" in the future, and will definitely request Alfred when I do.
2005 LEXUS LS430 - BATTERY - SAN FRANCISCO, CALIFORNIA

Mario

17 years of experience
30 reviews
Mario
17 years of experience
Mario was really great! I would recommend him to anyone.
2005 CHRYSLER PT CRUISER - BATTERY - NAPLES, FLORIDA

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