Parts for your 2023 Subaru Impreza-Oil pump

2023 Subaru Impreza oil pump — what it does, and when to look at replacing it

Yes, the 2023 Subaru Impreza absolutely uses an engine oil pump. Factory technical literature for the FB20-series engine (Subaru Service Manual via STIS, Lubrication System section) details a crankshaft-driven internal trochoid oil pump built into the front timing cover. Subaru’s OEM parts catalogues for the 2023 Impreza list a complete oil pump assembly for FB20 models, and independent databases such as ALLDATA/Autodata carry the same diagrams and service steps. So, an oil pump is relevant and fitted to every petrol 2023 Impreza.

The oil pump’s job is straightforward but critical: it pressurises and circulates oil through the engine to lubricate bearings, camshafts and timing chains, cool hotspots, and feed the AVCS (variable valve timing) system. Without steady pressure, metal meets metal, temps rise, and things go pear-shaped. In the Impreza’s FB20, the pump is driven directly by the crank, so output scales with revs and keeps the system stable even in stop–start city traffic.

It’s not a scheduled replacement item