carfobbattery

Infiniti Q45 key fob battery

5 of the 11 model years listed for the Infiniti Q45 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. 1996Remote (separate)

    Not confirmed yet

  2. 1997-2001Remote (separate)

    Not confirmed yet

  3. 2002-2006Remote (separate)

    CR2025

    FCC ID KBRASTU13

    Two sites agree: americankeysupply.com and bestkeysupply.com (checked Nov 1, 2026)

    Find CR2025 on Amazon

Changing the battery

Separate remote fob

  1. The remote is a small standalone unit. You will not need to touch the ignition key at all.
  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. Swap the cell or cells, keeping the same side up as the old ones.
  4. Close the fob and test it. If it does not work, open it again and check the cell is seated flat.

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.

Coin cells are a choking and burn hazard for children. Store the spares in their original pack, out of reach.

Other Infiniti models