carfobbattery

Infiniti I35 key fob battery

Every model year listed for the Infiniti I35 has 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)

    CR2025

    FCC ID KBRASTU15

    Two sites agree: uhs-hardware.com and americankeysupply.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. Look for a screw on the back or a notch on the edge. Remove the screw if present, then twist a coin in the notch to split the case.
  3. Lift the old coin cell out and press the new one in with matching orientation.
  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.

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

Other Infiniti models