Subaru Ascent Manuals 2025 Ascent Owner's Manual | Page 356

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Remote engine start system( dealer option)
. 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“ keyless access with push-button start system”:
Perform the procedure described in“ Replacing battery of access key fob” FP512.
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.
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 flat-head screwdriver.
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.