carfobbattery

Acura RSX key fob battery

2 of the 5 model years listed for the Acura RSX have a proven battery. The most common answer is CR2025. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.

  1. 2002-2004Remote (separate)

    Not confirmed yet

  2. 2005Remote (separate)

    CR2025

    Owner's manual: manua.ls (checked Nov 1, 2026)

    Manual text: “Battery type: CR2025”

    Find CR2025 on Amazon
  3. 2006Remote (separate)

    CR2025

    FCC ID E4EG8D-444H-A

    Two sites agree: uhs-hardware.com and americankeysupply.com (checked Nov 2, 2026)

    Find CR2025 on Amazon

Changing the battery

Separate remote fob

  1. A separate fob has no key blade inside, so it opens with nothing but a coin or a small screwdriver.
  2. Turn it over: some older fobs use one small screw, newer ones just clip. Pry at the seam once any screw is out.
  3. Replace the cell, keeping the + side where it was, and check the small metal tab still touches it.
  4. Snap the case shut and watch for the lights to flash when you press lock at the car.

A CR2025 is 20 mm across and 2.5 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.

If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.

Other Acura models