Service
Prius 12V battery replacement
Your Prius has two batteries, and the small one in the back is the one most owners end up replacing first. We test it properly, replace it where that is the fault, and come to you to do it.
What this includes
- $100–$400 fitted, mobile anywhere in the Phoenix metro
- Load-tested before replacement, not a resting-voltage reading
- Every Prius generation, plus Prius c, Prius v and Prius Prime
- The hybrid pack checked at the same time, so you don't replace the wrong one
What the job costs and what it includes
A Prius 12V replacement runs $100–$400 fitted, depending on the battery your car takes. That is the price at your home or work — we bring the battery and the tools to you.
- A load test on the battery you have, so you are not replacing a good one.
- A charging-system check — an alternator-less hybrid still has a DC-DC converter that can be the real fault.
- The replacement fitted, with the battery secured and vented the way the car expects.
- A scan for stored codes afterwards, because low voltage leaves faults behind that should be cleared once the cause is gone.
Which Prius we cover
- Prius, 2001–2003 (first generation)
- Prius, 2004–2009 (second generation)
- Prius, 2010–2015 (third generation)
- Prius, 2016 onward (fourth generation)
- Prius c, Prius v and Prius Prime
Why a Prius 12V is not a normal car battery
On most Prius generations the 12V sits in the rear of the car rather than in the engine bay. A battery living inside the cabin has to be a sealed type routed to a vent — a standard flooded battery off a parts-store shelf is the wrong part for that location, whatever the terminals look like.
Arizona shortens the life of this battery
Sustained heat is hard on small batteries. Prius 12V batteries here often need replacing in under three years, well before the label suggests. Once the car is a few years old, have it tested annually rather than waiting to be stranded.
Frequently asked questions
How much is a 12V battery for a Prius?
How long does a Prius 12V battery last in Phoenix?
Can I put a regular car battery in a Prius?
Will a new 12V battery fix my red triangle warning?
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Not sure what your hybrid needs? We'll work it out with you.
We come to you, test the pack, the 12V and the cooling, and you get a written quote before anything is decided. No obligation.