Subaru key fob battery

Subaru keyless-access smart keys use a CR2032; some older keyless remotes use a CR1620.

Battery	Used in	Size	Capacity
CR2032	Subaru (most common)	20 mm × 3.2 mm	≈ 225 mAh
CR1620	Subaru (older models)	16 mm × 2 mm	≈ 75 mAh

CR2032, CR1620 at the same scale.

Subaru: starting with a dead fob

Touch the push-button start with the Subaru-logo side of the key, then press it with your foot on the brake.

To change it: release and pull out the metal key, twist its tip in the seam to split the case, and fit the new cell the same way up. Step-by-step guide.

Also mainly CR2032: BMW, Volkswagen, Audi, Jeep.

Key types change between model years; the code on your old battery is final.