Toyota Corolla 12V Battery Size and Replacement: 2010 and 2014 Models
The short answer
For North American 2010 and 2014 Toyota Corolla sedans with gasoline engines, the replacement 12V battery is most commonly listed as BCI Group 35. The group size is a standard from the Battery Council International (BCI) that defines a battery's case dimensions and terminal layout. The 2010 car belongs to the tenth-generation Corolla and the 2014 car to the eleventh, but both are generally fitted with the same group size.
Treat this as a starting point, not a guarantee. Confirm it against your car before you buy, because market, engine and a previous owner's choices can change what is actually under the hood.
Conditions that can change the answer
Market: Corollas sold outside North America were built to different specifications, and some use batteries labelled under Japanese (JIS) or European (EN) sizing systems instead of BCI groups. A Group 35 listing applies to US and Canadian cars. Engine on the 2010 model: US 2010 Corollas were offered with a 1.8-liter engine and, on the XRS trim, a 2.4-liter engine. Group 35 is commonly listed for both, but XRS owners should check the fitment for their exact engine rather than assume it. Previous replacements: An earlier owner or shop may have installed a different group size that happens to fit the tray. Matching the battery already in the car can repeat a past mismatch. Imported or grey-market cars: A Corolla brought in from another country may not follow North American fitment at all.
How to confirm the right battery for your car
Check the owner's manual for the battery specification. Read the label on the current battery for its group size and cold cranking amps (CCA), which is the rating for how much current the battery can deliver to start an engine in cold weather. Use a parts retailer's fitment lookup and enter the exact model year, engine and trim. Compare terminal positions. A battery in the right group but with reversed positive and negative posts may leave the cables too short to reach.
This guide does not give a specific CCA figure or battery dimensions, because no verified specifications were available for it. Use the original battery label or the owner's manual for those numbers, and choose a replacement that meets or exceeds the original CCA rating.
Points to know before replacing it
Disconnect the negative terminal first and reconnect it last. This lowers the risk of a short circuit if a tool touches the car's metal body. Refit the hold-down bracket so the battery cannot move while driving. Expect to reset the clock and radio presets after the battery has been disconnected. Most retailers accept the old battery for recycling, and some charge a core deposit that is refunded when you return it.