How To Reprogram A Push To Start Key Fob. Most of the newer subaru models can't be reprogrammed from home. Key fobs are often attached to a mechanical key, but this trend is increasingly on the decline.
Repeat this process for each key which is to be registered to the vehicle. Finish the procedure within 30 seconds. If you have this type of key then i believe you have to do the same procedure but there is a plastic cap over the ignition barrel you have to remove first then use the metal key blade in the back of the fob.
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If you have a push start vehicle, try pushing the vehicle start button directly with the key fob. Nothing in the owner's manual for the transmitter battery replacement indicates a need to reprogram. Now, turn the electrical system back on, but again, do not turn the engine on. That's because many of the new subarus have a proximity key, push button start, and don't actually use a key at all.