Fitment: for Subaru WRX 2015-2016, for Subaru Outback 2013-2017, for Subaru Impreza 2012-2016, for Subaru Legacy 2013-2017, for Subaru BRZ 2013-2015 Replaces Part Number: 10921AA220 Function: The variable valve timing solenoid is located in the cylinder head to control camshaft position and regulate intake (exhaust) volume. Reliable Choice: When the factory VCT solenoid fails, it can cause poor fuel economy and your vehicle will throw check engine lights. This oil control valve solenoid (OCV solenoid) can fix/close check engine light (CEL) error code. Material: Made of durable material, fast response, good durability, promote combustion efficiency, energy saving and economical, easy to install and clean.