--- title: "Toyota Corolla Key Fob Battery" description: "How the Toyota Corolla key fob battery specification changed from 2012 to 2025, compared generation by generation. The Toyota Corolla key fob takes a CR2032 (smart key fob, all E210 years) coin cell. How to open the fob without breaking it, and which substitutions actually work." url: "https://whichcarparts.com/cars/toyota/corolla/key-fob-battery" updated: "2026-08-20" --- # Toyota Corolla Key Fob Battery Type and Replacement The specification is not the same across every year we cover, the table below shows exactly where it changes. ## Has the Toyota Corolla key fob battery specification changed by year? | Model years | Fob battery | | --- | --- | | [2020-2025](https://whichcarparts.com/cars/toyota/corolla/2020-2025/key-fob-battery) | CR2032 (smart key fob, all E210 years) | | [2014-2019](https://whichcarparts.com/cars/toyota/corolla/2014-2019/key-fob-battery) | CR2032 (smart key, 2014-2019); basic remote-head keys also take a coin cell. Check the old battery | | [2012-2013](https://whichcarparts.com/cars/toyota/corolla/2012-2013/key-fob-battery) | CR2016 (remote-head key, FCC GQ4-29T); some replacement remotes take CR2025/CR2032. Check the old battery before buying | ## Full specifications by generation The key fob battery on a Toyota Corolla is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers. - [2020-2025 Toyota Corolla Key fob battery](https://whichcarparts.com/cars/toyota/corolla/2020-2025/key-fob-battery) - [2014-2019 Toyota Corolla Key fob battery](https://whichcarparts.com/cars/toyota/corolla/2014-2019/key-fob-battery) - [2012-2013 Toyota Corolla Key fob battery](https://whichcarparts.com/cars/toyota/corolla/2012-2013/key-fob-battery) ## Toyota Corolla key fob battery: common questions ### What battery does the Toyota Corolla key fob take? A single CR2032 (smart key fob, all E210 years) coin cell. ### Can you use a CR2032 instead of a CR2025 in a Toyota Corolla key fob? This fob takes a CR2032 (smart key fob, all E210 years), so start there. The two cells share a 20 mm diameter but differ in thickness, and the thicker one does not always seat in a housing built for the thinner. ### How do you open a Toyota Corolla key fob? Slide out the mechanical emergency key first, which usually releases a catch, then part the halves with a plastic pry tool or a coin wrapped in tape. A screwdriver will mark the case and can crack the seam. ## Sources - [2023 Corolla Owner's Manual, maintenance data (Toyota.com)](https://www.toyota.com/owners/warranty-owners-manuals/digital/article/corolla/2023/om02568u/ch08se010401/) - [Toyota Genuine Battery application chart 2023, ZRE212/ZWE21# = LN1, MZEA12 = LN2 (toyotapartsandservice.com)](https://www.toyotapartsandservice.com/wp-content/uploads/2023/09/03_Batteries2023_hi.pdf) - [Toyota Genuine Spark Plug application chart 2020, E210 plug part numbers (toyotapartsandservice.com)](https://www.toyotapartsandservice.com/wp-content/uploads/2020/08/09_SparkPlugs2020_hi.pdf) - [Toyota Genuine Oil Filter application chart 2020, 90915-YZZF2 for all E210 engines (toyotapartsandservice.com)](https://www.toyotapartsandservice.com/wp-content/uploads/2020/08/06_OilFilters2020_hi.pdf) - [AMSOIL vehicle lookup, 2020 Corolla 2.0L M20A-FKS capacities](https://www.amsoil.com/lookup/auto-and-light-truck/2020/toyota/corolla/2-0l-4-cyl-engine-code-m20a-fks-3/) - [Legacy Toyota, Corolla oil type & capacity by year (dealer service guide)](https://www.legacytoyotadallas.com/service/service-and-parts-tips/toyota-corolla-oil-type-and-capacity/) - [fueleconomy.gov, 2021 Corolla / Corolla Hybrid EPA ratings](https://www.fueleconomy.gov/feg/bymodel/2021_Toyota_Corolla.shtml) - [TirePressure.org, 2021 Toyota Corolla placard pressures](https://tirepressure.org/toyota/corolla/2021) - [NHTSA recall 20V-682, Denso fuel pump](https://static.nhtsa.gov/odi/rcl/2020/RCLRPT-20V682-8151.PDF) - [iFixit, 2018-present Corolla 12V battery replacement (engine-bay location)](https://www.ifixit.com/Guide/2018+2019+2020+2021+2022+2023+2024+2025+2026+Toyota+Corolla+12V+Battery+Replacement/226153) ## Find your exact Corolla - [2025](https://whichcarparts.com/cars/toyota/corolla/2025) - [2024](https://whichcarparts.com/cars/toyota/corolla/2024) - [2023](https://whichcarparts.com/cars/toyota/corolla/2023) - [2022](https://whichcarparts.com/cars/toyota/corolla/2022) - [2021](https://whichcarparts.com/cars/toyota/corolla/2021) - [2020](https://whichcarparts.com/cars/toyota/corolla/2020) - [2019](https://whichcarparts.com/cars/toyota/corolla/2019) - [2018](https://whichcarparts.com/cars/toyota/corolla/2018) - [2017](https://whichcarparts.com/cars/toyota/corolla/2017) - [2016](https://whichcarparts.com/cars/toyota/corolla/2016) - [2015](https://whichcarparts.com/cars/toyota/corolla/2015) - [2014](https://whichcarparts.com/cars/toyota/corolla/2014) - [2013](https://whichcarparts.com/cars/toyota/corolla/2013) - [2012](https://whichcarparts.com/cars/toyota/corolla/2012) More Toyota Corolla guides: - [Oil & filter](https://whichcarparts.com/cars/toyota/corolla/oil) - [Battery](https://whichcarparts.com/cars/toyota/corolla/battery) - [Tires & wheels](https://whichcarparts.com/cars/toyota/corolla/tires) - [Wiper blades](https://whichcarparts.com/cars/toyota/corolla/wipers) - [Air & cabin filters](https://whichcarparts.com/cars/toyota/corolla/filters) - [Bulbs](https://whichcarparts.com/cars/toyota/corolla/bulbs) - [Brakes](https://whichcarparts.com/cars/toyota/corolla/brakes) - [Fluids](https://whichcarparts.com/cars/toyota/corolla/fluids) - [Service schedule](https://whichcarparts.com/cars/toyota/corolla/service-schedule) - [Problems & reliability](https://whichcarparts.com/cars/toyota/corolla/common-problems) - [Oil light reset](https://whichcarparts.com/cars/toyota/corolla/oil-reset) - [Specs](https://whichcarparts.com/cars/toyota/corolla/specs) Specifications vary with engine option, production date, and market.