Subaru Forester: Remote engine start system (dealer option) / System maintenance


For remote engine starter transceiver: In the event that the vehicle’s battery is replaced, discharged or disconnected, it will be necessary to start the vehicle a minimum of one time using the key prior to activating the remote engine start system. This is required to allow the vehicle electronic systems to resynchronize.

Changing the battery


  • Do not let dust, oil or water get on or in the remote engine start transmitter when replacing the battery.
  • Be careful not to damage the printed circuit board in the remote engine start transmitter when replacing the battery.
  • Be careful not to allow children to touch the battery and any removed parts; children could swallow them.
  • There is a danger of explosion if an incorrect replacement battery is used. Replace only with the same or equivalent type of battery.
  • Battery should not be exposed to excessive heat such as sunshine, fire or the like.

For models with “keyless access with push-button start system”:

Perform the procedure described in “Replacing battery of access key fob”.

For remote engine starter transceiver:

The 3-volt lithium battery (model CR-2450) supplied in your remote engine start transmitter should last approximately one year, depending on usage. When the battery begin to weaken, you will notice a decrease in range (distance from the vehicle that your remote control operates). Follow the instructions below to change the remote engine start transmitter battery.

Subaru Forester. System maintenance

  1. Remove the small phillips screw located on the back side lower left corner of the transmitter.
  2. Carefully pry the remote engine start transmitter halves apart using a small flathead screwdriver.

    Subaru Forester. System maintenance

    Subaru Forester. System maintenance

  3. Remove the circuit board from the bottom half of the case and remove the battery and replace with new one. Be sure to observe the (+) sign on the old battery before removing it to ensure that the new battery is inserted properly (battery “+” should be pointed away from the transmitter circuit board on battery).
  4. Carefully snap the case halves back together, reinstall the phillips screw and test the remote engine start system.

    Remote transmitter program (Remote engine starter transceiver)


    Certification for remote engine starter

    U.S.-spec. models CAUTION FCC WARNING Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment...

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