Parts for your 2017 Subaru Forester-Oil seals

2017 Subaru Forester oil seals — what they do and when to sort them

Oil seals are absolutely used on the 2017 Subaru Forester. Technical sources including the Subaru Forester (SJ, MY17) Factory Service Manual and the Subaru Electronic Parts Catalogue list multiple seals across the vehicle — crankshaft front and rear main seals, camshaft seals, axle/differential side seals, transmission input/output and drive pinion seals (for CVT/manual and front/rear diffs). These seals are fitted to FB25/FA20 petrol engines (and EE20 diesel where applicable in AU/NZ) and the Lineartronic CVT or manual driveline.

In plain terms, oil seals keep lubricants in and dust, water and grit out. They sit where rotating shafts pass through housings, such as the front of the engine (crank pulley), the back of the engine (rear main), camshaft ends, the CVT/manual gearbox output, and the diff/axle interfaces. Good seals mean stable oil levels and no mess on the driveway, tired seals mean weeping, drips, and eventually wear to expensive parts.

There’s no fixed replacement interval in Subaru’s servicing schedules for the Forester’s oil seals — they’re replaced on condition. Smart servicing in Australia and New Zealand includes a quick look during each oil change or WOF/rego check:

• Front of engine around the crank pulley and timing cover for misting
• Bellhousing/engine block join for rear main seepage
• CVT or manual case around the axle stubs and output seal
• Rear diff pinion and side seals near the axle flanges

If a seal is weeping, don’t ignore it. Low engine oil or CVT fluid can snowball into big repairs. Replacing a seal is usually straightforward for a trained tech: confirm the source (clean and re-check), inspect the shaft surface for grooves, renew the seal with the correct driver, seat it to spec, lightly oil the lip, and verify crankcase ventilation (a stuck PCV can push seals out). Rear main and some transmission seals need more labour as the gearbox may need to come out — ideal to tackle when doing a clutch (manual) or other major work.

Use genuine or OE-quality seals, new O-rings where specified, and fresh fluid if contamination is suspected. With our local heat, dust, and corrugations, catching a small weep early is the cheapest fix your Forester will ever get.

Popular questions about 2017 Subaru Forester oil seals

How can someone spot a leaking oil seal on a 2017 Forester?
They’ll often notice a light mist of oil building up into a damp ring around a pulley or flange, or fresh oil tracks underneath. Common signs are oil on the lower timing cover, dampness at the bellhousing join, or CVT fluid around an axle stub. A clean-down and short drive is the best way to confirm the true source.

Do oil seals have a set replacement interval?
No. Subaru doesn’t assign a time or kilometres-based interval for oil seals on the 2017 Forester. They’re replaced when leaking, or preventatively during related jobs — for example, a rear main seal while the gearbox is out, or axle seals during CV/boot or bearing work.

Is it safe to drive with a minor oil seal leak?
A short trip may be fine, but it’s risky to keep driving if the leak worsens. Engine oil loss can damage bearings and timing components, CVT fluid loss can cause shifting issues and overheating. Top up if needed and book it in — early repair is cheaper than waiting.