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Parts for your 2019 Nissan Pathfinder-Oil cap
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2019 Nissan Pathfinder oil cap — what it does and how to look after it
The 2019 Nissan Pathfinder (R52) runs a 3.5‑litre petrol V6 and absolutely uses an engine oil filler cap. This is confirmed by Nissan’s Owner’s Manual for the model year (engine oil section and under‑bonnet overview), the Nissan Service Manual (Engine Mechanical/EM illustrations), and the OEM parts catalogue, which lists an engine oil filler cap assembly for the R52 VQ35 engine. So yes — the oil cap is relevant, fitted, and important on this vehicle.
The oil cap seals the filler neck on the cam cover and provides the safe point to top up oil. More than just a lid, it helps keep dust and moisture out, maintains the correct crankcase pressure for the PCV system, and often carries the recommended oil grade marking for quick reference. A sound seal matters on the VQ35, as unmetered air entering through a loose or damaged cap can upset fueling and idle quality.
If the cap is loose, cracked, or missing, owners may notice oil mist under the bonnet, a hot oil smell, light smoke as oil hits hot components, or even a check engine lamp due to a vacuum leak. It can also make a mess around the filler neck and engine cover.
- Inspect the cap at every service or oil change. Make sure it turns freely, seats square, and tightens positively.
- Check the rubber O‑ring/seal for flattening, hardening, or splits. Replace the cap (or seal, if serviceable) if any damage is found.
- Wipe the filler neck and cap threads so grit can’t score the seal.
Replacement is simple and tool‑free, but stick with a genuine or high‑quality equivalent so the thread, height, and seal profile match the VQ35 cover properly.
- Let the engine cool and pop the bonnet.
- Turn the cap anticlockwise to remove, check the O‑ring isn’t stuck in the neck.
- Lightly oil the new seal, align, and turn clockwise by hand until snug — don’t over‑torque.
- Start the engine and check for any seepage after a short drive.
Many caps are marked with an oil grade, but always follow the Owner’s Manual for market‑specific viscosity and specification. As a rule, the cap itself isn’t a scheduled replacement item — it’s replaced on condition. If there’s persistent weeping, a perished seal, or it no longer tightens cleanly, it’s time for a new one.
Popular questions
Where is the oil cap on a 2019 Pathfinder?
It’s on the top of the engine under the bonnet, threaded into the cam cover. On models with a plastic engine cover, the cap is accessible through a cut‑out or after lifting the cover. It’s usually labelled “Engine Oil”.
What happens if the oil cap is missing or loose?
Oil can splash out, creating smells and residue under the bonnet. The engine may idle roughly and trigger a check engine light because of unmetered air entering the crankcase ventilation path. Don’t keep driving like that — fit a correct cap promptly.
Does the oil cap specify the correct oil grade?
Many Nissan caps are moulded with a common grade, but owners should follow the Owner’s Manual for the exact viscosity and specification for Australia or New Zealand conditions. The manual takes precedence over any cap marking.
