Parts for your 2012 Subaru Impreza-Oil pump

2012 Subaru Impreza oil pump – what it does and how to look after it

Based on the Subaru Factory Service Manual for the FB-series engine (Engine Lubrication section), the Subaru FAST parts catalogue listing the Pump Assy – Oil for the 2012 Impreza, and common repair data used by workshop manuals, the 2012 Subaru Impreza absolutely uses an oil pump. It’s a crank-driven, internal trochoid-style pump housed in the timing cover on the FB20 engine, and it’s vital to the engine’s pressurised lubrication system.

This oil pump’s whole job is to pull oil from the sump, pressurise it, and push it through galleries to bearings, camshafts, the timing chain and other moving bits. Without that steady pressure, metal surfaces would cop it, temperatures would spike, and the engine wouldn’t last long. The pump also carries an inbuilt pressure relief valve to keep things in the sweet spot as revs rise.

For servicing, the smart play is prevention. Stick to correct-grade engine oil and change intervals as per the handbook (commonly a high-quality full-synthetic 0W-20 or 5W-30 meeting the proper spec, suited to local climate). Fresh, clean oil is the pump’s best mate