Description: A device, power by electricity, pneumatic, or hydraulics, used to rotate/crank a vehicle's engine as to initiate the engine's operation under its own power. Fits Impreza, STI, WRX Motor AY Starter. Starter Motor You turn the key, hear a loud sharp CLICK, and your engine doesn't crank???sounds like your Subaru may need its Starter replaced. If any of these symptoms sound familiar, contact our service department. WRX. w/ turbo. Impreza. 2.5l. Impreza. 2.0l. Manual Trans.