Lexus RC key fob battery
7 of the 12 model years listed for the Lexus RC have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2015-2016Smart key
CR2032
FCC ID HYQ14FBATwo sites agree: americankeysupply.com and uhs-hardware.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2017-2018Smart key
Not confirmed yet
- 2019Smart key
Not confirmed yet
- 2020Smart key
CR2032
FCC ID HYQ14FLBTwo sites agree: americankeysupply.com and uhs-hardware.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2021-2022Smart key
CR2032
FCC ID HYQ14FLBTwo sites agree: americankeysupply.com and uhs-hardware.com (checked Nov 1, 2026)
Find CR2032 on Amazon - 2023Smart key (electronic key)
CR2032
Two sites agree: royalkeysupply.com and locksmithkeyless.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2024Smart key
Not confirmed yet
- 2025Smart key (electronic key)
CR2032
Owner's manual: manua.ls and locksmithkeyless.com (checked Nov 1, 2026)
Manual text: “Use a CR2032 lithium battery”
Find CR2032 on Amazon - 2026Unknown
Not confirmed yet
Changing the battery
Smart key (push-button start)
- Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Pop the old battery out with a toothpick or plastic pick, not a metal blade, and seat the new one with the + side matching the old one.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
Lexus smart keys usually hide the metal key behind a release button; the cover opens from the notch next to where the key sat.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.