Parts for your 2019 Nissan Pathfinder-Oil seals

2019 Nissan Pathfinder oil seals

Oil seals are absolutely used on the 2019 Nissan Pathfinder (R52). Technical references including the Nissan R52 Service Manual (Engine Mechanical, Transaxle/CVT, Transfer and Rear Final Drive sections) and Nissan parts catalogues identify multiple factory oil seals: front and rear crankshaft seals on the VQ35 V6, CVT output/drive-shaft seals, transfer case/Power Transfer Unit seals on 4WD models, and rear differential axle and pinion seals. So, oil seals are relevant to this vehicle and form a normal part of its lubrication and driveline systems.

On this Pathfinder, oil seals do a simple but vital job: they keep engine oil, CVT fluid and diff oil in, and keep dust, water and road grime out. They’re press-fit, elastomer-lipped rings that run on rotating shafts, using spring tension and a fine oil film to hold pressure without chewing out the metal.

• Engine: front crank seal (behind the harmonic balancer) and rear main seal (between engine and CVT).
• Transmission/4WD: CVT drive-shaft (axle) seals, PTU/transfer input and output seals, rear diff axle and pinion seals.

There’s no fixed kilometre interval to replace them, the go is to inspect at each service. Under the bonnet and underbody, look for weeping around the crank pulley, the bellhousing joint, the CVT case where the shafts enter, and at the transfer and rear diff. A light mist is an early clue, drops on the driveway, burning-oil smells, or fluid on the undertrays mean it’s time to act.

Front crank and axle seals can often be done with the engine in the car, but they still need the right pullers, installers, and careful lip lubrication. Rear main seals and some PTU/diff seals are more labour-heavy, they’re best tackled when the CVT or driveline is already out. Always use quality OEM-spec seals, check the shaft running surface for grooves, and fill or top up with the correct Nissan-approved engine oil, CVT fluid and gear oil. After any seal job, clean the area thoroughly and recheck for seepage after a few short trips.

Given Aussie and NZ conditions—heat, towing, corrugations, and beach work—regular inspections are smart. If the Pathfinder tows a van or hits the tracks, have the workshop keep an extra eye on the CVT axle seals, PTU and rear diff during routine servicing.

Popular questions about 2019 Nissan Pathfinder oil seals

Where do these Pathfinders most commonly leak from?
Typical spots are the front crank seal (oil mist near the crank pulley), CVT axle seals (fluid around the shaft entries), the PTU/transfer (4WD), and the rear diff pinion or axle seals. Leaks can travel with airflow, so a proper clean and UV dye test helps pinpoint the true source.

Do oil seals have a replacement interval?
No set interval. They’re replaced on condition—when leaking, during related repairs, or if the seal lip or shaft surface shows wear. Checking for seepage at every service is the best approach, especially if the vehicle tows or sees off‑road use.

Can a DIYer replace them at home?
Experienced home mechanics might handle a front crank or an axle seal with the correct tools and service data. Rear main, PTU and some diff seals are best left to a pro, as they often require drivetrain removal and precise installation to avoid repeat leaks.