Parts for your 2015 Mitsubishi Lancer-Oil seals

2015 Mitsubishi Lancer oil-seals — purpose, checks and when to replace

Oil-seals are absolutely used on the 2015 Mitsubishi Lancer. Technical sources including the Mitsubishi Motors Service Manual for the CF-series Lancer (2015 MY) — Engine (Group 11A), Transaxle/CVT (Group 22), and Front/Rear Axle (Groups 26/27) — as well as the Mitsubishi ASA electronic parts catalogue, list multiple seals: front and rear crankshaft oil seals, camshaft oil seals, transaxle/CVT input and output/drive-shaft seals, and (where fitted) transfer case and rear differential pinion/axle seals.

On the Lancer’s 4B10/4B11/4B12 chain-driven petrol engines, oil-seals keep engine oil where it belongs and stop dust, water and grit sneaking in. They also separate fluids inside the CVT or manual gearbox and keep CVT/gear oil from weeping past the driveshafts. Whether it’s a front-wheel-drive runabout or an AWD variant, these seals protect bearings, clutches and belts/chains from oil contamination and pressure loss — critical for long-term reliability.

They’re not a regular “replace-by-kilometre” service item, but they should be checked at every service under the bonnet and on the hoist. The smart play is to renew relevant oil-seals proactively during bigger jobs that provide access — for example, when the gearbox is out for a clutch, when resealing the timing chain cover, or when servicing CVT output bearings. Catching weeps early avoids oil on belts, degraded mounts and pricey repairs down the track.

• Typical signs a Lancer oil-seal is on the way out:
  • Oil mist or dampness around the crank pulley/timing cover
  • Drips from the bellhousing area (rear main seal)
  • Seepage at CVT/manual trans driveshafts or selector/input shafts
  • Burnt-oil smell after a drive or fresh spots on the driveway

Good workshop practice matters. Use quality OEM-equivalent seals (Mitsubishi/NOK), inspect the running surface on shafts, lightly oil the seal lip, and seat to the specified depth with the correct driver. Always clean the bore, verify PCV/breather function to prevent crankcase pressure from pushing oil past a new seal, and follow torque specs on pulleys and driveshafts. For CVT models, ensure the driveshaft seal is set square and flush to the manual spec