How To Change A Subaru Key Battery. Use the right screwdriver to avoid damage to the screw or the fob casing. Unscrew the single Phillips screw on the back of the key fob using a 1 Phillips screwdriver.
The type of battery you need is a CR-2032. Here is all the information you need. Step 1 Key Fob Battery.
From there you can remove the battery and replace it.
Open the key head using a flat-head screwdriver. What the key fob battery low warning light means. Most fobs can be pried open to access the battery so you may not have to take. I got a 5 back of batteries on eBay for 150.
