2005 Toyota Prius Battery Size
The 2005 Toyota Prius uses a BCI Group 51R battery, rated about 410-500 cold cranking amps (AGM).
- Battery type (OEM)
- AGM
- Cold cranking amps (CCA)
- 410-500
- Terminal position
- Reversed-terminal layout (R)
- Dimensions (L×W×H)
- 238×129×223 mm
- Location
- Under the hood (engine bay)
12V auxiliary battery (NHW20); the HV traction pack is separate. Always confirm against your owner's manual or current battery label.
Where to buy a Group 51R battery
A car battery is heavy and expensive to ship, so buying in person (Walmart, Costco, or a local auto-parts store) often beats online once you count free installation and the core-charge refund on your old battery. To compare prices and reviews online:
Search Group 51R batteries on Amazon410+ CCA, AGMAs an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
Frequently asked
What size battery does a 2005 Toyota Prius take?
The 2005 Toyota Prius uses a BCI Group 51R battery, rated around 410-500 cold cranking amps.
Does the 2005 Toyota Prius need an AGM battery?
Yes - this configuration is fitted with an AGM battery from the factory, typically required on start-stop equipped trims.
How many cold cranking amps (CCA) does it need?
Aim for roughly 410-500 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.
Where is the battery located?
Under the hood (engine bay). Reversed-terminal layout (R).