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How to Replace a Keyless Entry Remote Battery

by Thomas West

Keyless entry systems allow you to lock and unlock your car doors at the touch of a button. Remote transmitters small enough to carry on your key ring can operate your door locks, trunk lid, cargo hatch or panic button from several feet away. The remote transmitter is powered by a small battery contained within the device and should last a few years. If your remote stops working, or does not work at your accustomed distance, the battery may need replacing.

Saab Key and Remote Combination

Step 1

Twist out the small retaining screw from the back of the remote transmitter with a Phillips screwdriver. Set the screw aside. Gently pry the transmitter apart with a fingernail.

Step 2

Lift the battery from the smaller half of the transmitter and discard.

Step 3

Make a note of the polarity markings on the battery compartment and push a new battery into place until it is fully seated.

Step 4

Push both pieces of the remote transmitter back together until they snap into place.

Twist the retaining screw back in with a Phillips screwdriver. Test the operation of the transmitter.

Ford and Chevrolet Remote Transmitters

Step 1

Insert a flat blade screwdriver or the edge of a coin into the slot on the base of the remote.

Step 2

Twist the screwdriver or coin until both halves of the remote come apart.

Step 3

Pry the battery out of the remote with your fingernail and discard. Do not remove the grease from the battery compartment, as this aids in keeping the remote waterproof.

Step 4

Check the battery diagram posted on the inside of the remote for the correct placement of the battery. Push a new battery into place.

Push the two halves of the remote together until they click. Test the operation of the remote.


  • Make sure the remote transmitter is snapped back together properly after replacing a battery; otherwise, water could enter the inside of the transmitter and cause damage.


  • Do no touch the circuitry in the remote transmitter when changing a battery, as static electricity from your body could occur and damage the transmitter.

Items you will need

  • Phillips screwdriver (Saab)
  • Flat blade screwdriver or coin (Ford, Chevrolet)
  • Replacement battery

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