Parts for your 2018 Subaru Impreza-Oil pump

2018 Subaru Impreza oil pump — purpose, maintenance, and replacement tips

Based on technical sources, the 2018 Subaru Impreza absolutely uses an engine oil pump. The Subaru Factory Service Manual for the 2017–2019 Impreza (FB20), Subaru’s Technical Information System (STIS), and the Subaru genuine parts catalogue all list the crankshaft-driven, positive-displacement oil pump as a core engine component. On the FB20, the pump is integrated at the front of the engine and supplies pressurised oil to bearings, camshafts, chains and control solenoids.

What does it do? The oil pump pulls oil from the sump and pushes it through the filter and galleries, keeping friction down, temperatures stable, and wear in check. It also maintains the oil pressure that the warning lamp on the dash is watching. Without it, an engine won’t last minutes — so it’s a critical bit of kit on any Impreza doing the daily commute or the long Kiwi and Aussie road trips.

There’s no fixed replacement interval for the pump itself