Parts for your 2023 Mitsubishi Asx-Oil seals

2023 Mitsubishi ASX oil-seals — what they do and when to replace them

Oil-seals are absolutely fitted to the 2023 Mitsubishi ASX. Technical sources including the Mitsubishi Motors Workshop Manual for the ASX/RVR/Outlander Sport platform (engine and transaxle sections), the Mitsubishi ASA electronic parts catalogue, and the JATCO CVT service documentation confirm the presence of radial shaft oil-seals at the crankshaft (front and rear), camshafts, transaxle input and output shafts, and at the driveshafts. These seals keep engine oil and CVT fluid where they should be, while blocking dust and moisture from getting in.

On this ASX, oil-seals do a quiet but critical job. The engine’s front and rear crankshaft oil-seals stop engine oil sneaking past rotating shafts. Camshaft seals keep the top end tidy around the timing area. In the CVT and front transaxle, output shaft and driveshaft oil-seals retain CVT fluid and diff oil, preventing drips on the driveway and safeguarding bearings and clutches. When these seals are healthy, the ASX runs cleaner, uses less oil, and avoids messy underbody spray.

They’re not a “replace by kilometre” item, instead, they’re replaced on condition or when adjacent work is done. Good workshops in Australia and New Zealand will inspect around the crank pulley, timing cover edges, bellhousing joint, and driveshaft flanges at each scheduled service. Seepage, oil misting, or wetness are early signs, visible drips or fluid on the undertray need attention.

• Typical symptoms: light oil smell after a drive, oil spots under the front, red/brown CVT fluid near the left/right driveshafts, or oily dust build-up on the timing cover.
• Best practice: if the timing cover is off (e.g., for belt/chain or water pump work), renew the cam and front crank seals. If a driveshaft is removed, consider fresh output seals.
• Prevention: keep crankcase ventilation (PCV) and engine breathers clear—excess pressure can force oil past seals. Use the correct viscosity engine oil and approved CVT fluid.

Replacement is precise work: the seal lip must sit square, the shaft surface needs to be clean and smooth, and installers should use proper drivers—no tapping against the lip. Genuine or OEM-quality seals and correct fluid levels help the ASX stay leak-free for years.

Popular questions about 2023 Mitsubishi ASX oil-seals

Where are the main oil-seals on a 2023 ASX?
They’re at the front and rear of the crankshaft, on the camshafts behind the timing cover, and at the transaxle where the driveshafts enter. The CVT also uses shaft seals to keep its fluid in and contaminants out. A technician will spot them during routine leak checks.

How long do oil-seals last and when should they be replaced?
Many last well past 150,000 km, but heat, age, and pressure can harden the rubber. They’re replaced when leaking or whenever related components are off the car. Regular servicing and correct fluids extend their life.

Can the ASX be driven with a small oil-seal leak?
Short trips may be possible, but it’s risky. A minor seep can turn into a proper leak, lowering engine oil or CVT fluid levels and potentially damaging expensive components. It’s best to book an inspection and fix it before it escalates.