Pontiac G3 key fob battery
Every model year listed for the Pontiac G3 has a proven battery. The most common answer is CR1620. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2009Remote (manual says RKE transmitter)
CR1620
Owner's manual: manualslib.com (checked Nov 1, 2026)
Manual text: “Use one three-volt, CR1620, or equivalent, type battery.”
Find CR1620 on Amazon - 2010Remote (manual says RKE transmitter)
CR1620
Owner's manual: manualslib.com (checked Nov 1, 2026)
Manual text: “Use one three-volt, CR1620, or equivalent, type battery.”
Find CR1620 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.
- Find the slot along the edge and turn a coin in it. Go slowly so the clips do not snap.
- Lift the old coin cell out and press the new one in with matching orientation.
- Reassemble and test from a short distance.
A CR1620 is 16 mm across and 2.0 mm thick. It is easy to confuse with the 20 mm CR20xx sizes, which will not fit.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.