Parts for your 2014 Nissan Serena-Oil cap

2014 Nissan Serena Oil Cap — Purpose, Care, and Replacement

Technical sources confirm the 2014 Nissan Serena is fitted with an engine oil filler cap. The Nissan C26 Serena factory service manual (Engine Mechanical—Lubrication) and Nissan’s FAST electronic parts catalogue for MR20DE petrol and S-HYBRID variants both list and illustrate the oil filler cap and its seal as standard components. So, the oil-cap is absolutely relevant on this model.

On the 2014 Serena, the oil cap does more than just close the filler hole. It seals the top of the engine’s rocker cover to keep contaminants out, helps control crankcase vapours by maintaining the intended sealing for the PCV system, and prevents oil mist from escaping under the bonnet. A healthy cap and gasket reduce the risk of leaks, burnt-oil smells, and messy splatter that can attract dirt and degrade hoses over time.

Owners of a 2014 Serena—whether a conventional MR20DE petrol or the S-HYBRID—can treat the oil cap as a small but important service item. During every oil change, the cap should be removed, wiped clean, and its rubber gasket (O-ring or moulded seal) inspected for flattening, cracks, or hardening. Refit by hand only, over-tightening can damage the threads or crush the seal. Opening the cap should always be done with the engine cool to avoid hot oil vapour and to keep condensation from dropping into the filler neck.

Replacement is generally “as needed”, not mileage-based. Genuine or high-quality aftermarket caps made for the C26 Serena will ensure correct thread engagement and sealing height. If the cap has gone missing, stop driving and fit a proper replacement before restarting—the engine can lose oil rapidly without it, and dust can be drawn into the top end.

• Signs an oil cap needs attention: oil mist around the filler area, a noticeable oil smell after drives, a loose or hard-to-turn cap, or visible damage to the seal.
• Quick care tips: keep the filler neck clean, check the cap every service, and replace the gasket if it’s flat or brittle. Avoid universal caps that don’t seat properly.

Position-wise, the Serena’s oil cap sits on the top of the engine cover/rocker cover, usually marked with the oil-can symbol and often “Engine Oil”. Diesel variants also use a dedicated filler cap, though the design differs by engine code.

FAQs

Where is the oil cap on a 2014 Nissan Serena?

It’s on top of the engine under the bonnet, threaded into the rocker cover. Look for the oil-can icon or “Engine Oil” marking. Depending on engine variant, it’s typically front or slightly to one side of the plastic engine cover.

Can driving without the oil cap damage the engine?

Yes. Oil can spray out, oil level can drop, and dust or moisture can enter the engine. It can also upset crankcase ventilation, leading to rough running. If the cap is missing, don’t drive—fit the correct replacement straight away.

Which oil cap should be used on a 2014 Serena?

Use a cap specified for the C26 Serena’s engine. Genuine Nissan parts or quality equivalents ensure the right thread and seal height. Avoid generic “one-size” caps, if unsure, match by VIN or engine code to get the correct fit.