Parts for your 2013 Nissan Navara-Fuel cap

2013 Nissan Navara Fuel Cap

Yes — a fuel cap is fitted and fully relevant to the 2013 Nissan Navara (D40). Technical sources confirm this: the Nissan Navara D40 Owner’s Manual (AU/NZ, 2013) includes a Fuel-filler cap section with “tighten until it clicks” guidance, and the D40 Factory Service Manual (FL Fuel and EC Engine Control sections) covers the cap’s role in sealing the system and, on petrol variants, EVAP leak diagnostics. Australian Design Rules for petrol vehicles (ADR 79 series) also require a sealed evaporative system, which relies on a correctly sealing cap.

On the Navara, the fuel cap’s job is simple but important. It seals the filler neck to keep fuel vapours in and dust and water out. On petrol models, a proper seal helps the EVAP system keep emissions in check and can prevent a check engine light for small leaks. On diesel models, there’s usually no EVAP leak test, but a tight, intact cap is still vital for avoiding contamination, especially if the ute sees gravel roads or off-road tracks. The OE-style cap is non‑vented, tank venting is handled elsewhere in the system, so use the specified type only.

As part of regular servicing, it’s smart to give the cap a quick once‑over. Wipe away grit from the sealing surface, check the rubber O‑ring for nicks, flattening, or hardening, and make sure the cap clicks firmly when tightened. Avoid lubricants on the seal, a clean, dry seal grips best. If there’s a persistent fuel odour around the filler, the cap doesn’t click, or you can see cracks or a perished gasket, it’s time to replace it with a genuine or high‑quality OE‑equivalent cap that matches your fuel type (petrol vs diesel) and Navara D40 spec.

• Replace the cap if: the tether is broken, the seal is damaged, the cap won’t click tight, fuel smell persists, or (on petrol) EVAP codes like P0455/P0456/P0457 appear after refuelling.
• During service: clean the filler neck lip, inspect the O‑ring, and refit until you get several clear clicks. Don’t overfill the tank, and always refit the cap promptly after refuelling.

Choosing the right replacement cap matters. Universal or vented caps can cause poor sealing or emissions issues on petrol models, and on diesels they can invite dust or water ingress. A correct Navara D40 cap keeps the ute running clean and drama‑free between services.

Popular questions about 2013 Nissan Navara fuel caps

Does a loose fuel cap cause a check engine light on a 2013 Navara?

On petrol Navaras it can, because the EVAP system checks for small leaks and may set codes like P0455/P0456/P0457. On diesel models a loose cap usually won’t trigger a MIL, but you might notice fuel smell or dust around the filler. Tighten until it clicks and clear any codes if applicable.

Is the 2013 Navara fuel cap locking?

The cap itself is typically a standard screw type, while the fuel door is often secured by the vehicle’s central locking on many trims. Aftermarket locking caps are available, but make sure any replacement is correct for the D40 and your fuel type.

How often should the fuel cap or seal be replaced?

There’s no fixed interval. Inspect it at every service, replace when the seal is perished, the cap won’t click, there’s ongoing fuel odour, or after EVAP leak faults on petrol models. Frequent off‑road or coastal driving may warrant earlier replacement due to dust and salt exposure.