Parts for your 2017 Mitsubishi Asx-Oil seals

2017 Mitsubishi ASX oil seals: what they do and when to sort them out

Oil seals are absolutely used on the 2017 Mitsubishi ASX. This is confirmed by Mitsubishi Motors’ factory Service Manual for the 2017 ASX/RVR/Outlander Sport (Engine Overhaul and CVT/Transaxle sections) and the Mitsubishi ASA electronic parts catalogue for GA-series ASX models, which list crankshaft, camshaft and transaxle/axle oil seals among the genuine parts.

On this ASX, oil seals keep engine oil and transmission/CVT fluid where they belong, while keeping dust and water out. They sit around rotating shafts and housings and rely on precise fitment and the right fluid to seal properly. When they leak, the result can be messy driveways, oil odours on hot components, and—left too long—low fluid levels that shorten engine or transmission life.

• Engine: front crankshaft seal (behind the crank pulley), rear main seal (between engine and gearbox), and camshaft end seals.
• CVT/Transaxle: left/right driveshaft (axle) oil seals, input/output seals inside the unit.
• AWD models: transfer case and rear differential pinion/side oil seals.

As part of regular servicing, it’s smart to have a mechanic check for weeping around the crank pulley, the bellhousing (rear main area), and where the CV shafts enter the CVT. Look for oil mist on the undertray, fluid on the lower crossmember, or drips after parking. Any sudden drop in engine oil or CVT fluid level warrants a closer look.

Oil seals aren’t a scheduled replacement item, they’re replaced when leaking, disturbed, or if a larger job is being done anyway. Rear main seal replacement is a gearbox-out job, so many owners tackle it during clutch work (manual) or if the transaxle is already being removed. Axle seals are commonly replaced when CV shafts are out. Use quality OEM-equivalent seals, a proper driver, and lightly oil the lip. Inspect the shaft surface for grooves, and check the PCV/breather system—excess crankcase pressure can push new seals to leak again.

After any seal work, refill with the correct Mitsubishi-approved engine oil or CVT fluid and verify levels hot and cold as per the service manual. A short recheck for seepage after a few hundred kilometres is a good shout.

Technical references: Mitsubishi Motors Service Manual (2017 ASX/RVR/Outlander Sport) – Engine (Lubrication/Overhaul) and CVT/Transaxle sections, Jatco CVT technical information for JF011E/JF016E output/axle seals, Mitsubishi ASA Electronic Parts Catalogue for GA-series ASX.

Popular questions

Do all 2017 ASX models have oil seals?
Yes. Every 2017 ASX—petrol, 2WD or AWD—uses multiple oil seals in the engine and transaxle. Factory service documentation and the Mitsubishi ASA parts catalogue list crankshaft, camshaft, axle and differential seals for these vehicles.

How urgent is a leaking axle seal on the CVT?
Pretty urgent. A small weep can turn into a drip and lower CVT fluid level, which risks belt/chain slip and internal wear. If there’s fresh fluid at a driveshaft, get it inspected soon and keep an eye on CVT fluid level and shift quality.

Is a rear main seal leak expensive to fix on a 2017 ASX?
It can be, because the gearbox needs to come out to access the seal. Labour is the big factor. Many owners bundle it with other work that already requires transmission removal to save time and cost. A trusted workshop can provide a local estimate.