Parts for your 2023 Subaru Impreza-Oil seals

2023 Subaru Impreza oil seals — what they do, where they are, and when to sort them

Oil seals are absolutely relevant on the 2023 Subaru Impreza. Technical sources including the Subaru Service Manual for the 2023MY Impreza (FB-series engine and TR580 Lineartronic CVT sections), Subaru’s Electronic Parts Catalogue, and scheduled maintenance guidance all identify multiple oil seals: front and rear crankshaft seals, camshaft seals, timing cover/cam carrier sealing, CVT/front differential side (axle) oil seals, and rear differential pinion/side oil seals. These seals are fitted from factory to keep engine, transmission, and differential oils where they belong.

On this Impreza, oil seals are there to keep lubricant in and muck out. The flat-four FB engine relies on front and rear crankshaft seals and camshaft-end seals to contain engine oil while the timing chains and variable valve timing hardware do their thing. The CVT’s integrated front differential uses axle shaft oil seals on both sides, and the rear diff has side and pinion seals to keep the gear oil tidy. When these seals harden, wear a groove in a shaft, or get nicked during a service, leaks show up as damp edges, drips on the undertray, or that burnt-oil whiff after a drive.

Oil seals aren’t a scheduled replacement item like filters