Lexus SC key fob battery
10 of the 14 model years listed for the Lexus SC have a proven battery. The most common answer is CR1616. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 1996-1997Remote (separate)
Not confirmed yet
- 1998-2000Key-head remote
CR1616
FCC ID HYQ1512VTwo sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 1, 2026)
Find CR1616 on Amazon - 2002-2008Key-head remote
CR2016
FCC ID HYQ12BBTTwo sites agree: uhs-hardware.com and americankeysupply.com (checked Nov 1, 2026)
Find CR2016 on Amazon - 2009Key-head remote (wireless remote control)
Not confirmed yet
- 2010Unknown
Not confirmed yet
Changing the battery
Key with remote in the head
- Here the key blade and remote are one piece. You open the plastic head, not the blade.
- Find the seam around the head. Twist a coin or small flat screwdriver in the notch at the blade end or side until the halves part.
- Replace the cell with the same face showing, and make sure the rubber keypad sits flat before closing.
- Snap it closed and press each button. The car still starts with a dead remote battery on most of these keys, because the start chip needs no battery.
A CR1616 is 16 mm across and 1.6 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
A CR2016 is 20 mm across and 1.6 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.