Parts for your 2018 Subaru Exiga-Oil seals

2018 Subaru Exiga oil-seals — what they do and when to replace them

Oil seals are absolutely relevant and fitted on the 2018 Subaru Exiga (including the Crossover 7). This is confirmed by Subaru technical literature: the Exiga (FB-series 2.0L petrol) and its Lineartronic CVT are shown in the Subaru Exiga (YA) Factory Service Manual and Subaru FAST electronic parts catalogue with multiple seals at the crankshaft (front and rear), camshaft ends, oil pump, CVT input/output, front differential/axle stubs, and the rear differential. These same assemblies are detailed in Subaru service data for the TR580 Lineartronic CVT and final drive units, which list replaceable radial oil seals at each rotating shaft interface.

On this Exiga, oil seals keep engine oil and CVT/diff lubricants where they belong while keeping dirt and water out. They sit around spinning shafts and housings, forming a flexible lip against a hardened surface. When they’re healthy, there’s no mess under the car, fluid levels stay steady, and bearings live a long, happy life.

There isn’t a fixed kilometre-based replacement interval for oil seals on the 2018 Exiga. Instead, they’re inspected during routine servicing and replaced if any seepage turns into a drip. Because the FB engine uses a timing chain (not a belt), proactive front crank/cam seal replacement isn’t a standard “while you’re in there” item like it was on older timing-belt Subarus. That said, if a component is off for other work (e.g., gearbox out, axle removed), it’s smart practice to fit fresh genuine seals at the same time.

• Common leak points to watch: front crankshaft area, the bellhousing joint (rear main), CVT front diff/axle seals, and the rear diff side and pinion seals.
• Tell-tales: oil or reddish CVT fluid spots on the driveway, oily residue on undertrays, a burning oil smell, or a low engine/CVT/diff fluid level.
• Service tips: keep crankcase ventilation (PCV) in good nick to avoid pressure that can push seals out