Infiniti QX4 key fob battery
3 of the 8 model years listed for the Infiniti QX4 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.
- 1997Remote (separate)
Not confirmed yet
- 1998Remote (separate)
Not confirmed yet
- 1999Remote (separate)
Not confirmed yet
- 2000-2001Remote (separate)
Not confirmed yet
- 2002-2003Remote (separate)
CR2025
FCC ID KBRASTU15Two sites agree: americankeysupply.com (checked Nov 1, 2026)
Find CR2025 on Amazon - 2004Remote (separate)
CR2025
FCC ID KBRASTU15Two sites agree: uhs-hardware.com and carandtruckremotes.com (checked Nov 1, 2026)
Find CR2025 on Amazon
Changing the battery
Separate remote fob
- The remote is a small standalone unit. You will not need to touch the ignition key at all.
- 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.
- Lift the old coin cell out and press the new one in with matching orientation.
- 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.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.