Parts for your 2014 Nissan X-trail-Radiator cap

2014 Nissan X‑TRAIL radiator-cap: what’s actually fitted

For the 2014 Nissan X‑TRAIL (T32), a traditional radiator-cap on the radiator itself isn’t used. Nissan’s factory literature for the T32 platform — the X‑TRAIL Service Manual (Cooling System/CO section) and the Owner’s Manual cooling system instructions — specify a sealed radiator and a pressurised coolant reservoir (expansion/degassing tank) with its own pressure cap. That reservoir cap does the same job people often mean when they say “radiator-cap”.

Why the change? Modern cooling systems place the pressure cap on the reservoir so the radiator can stay sealed. It improves de‑aeration, makes bleeding simpler, and helps packaging under the bonnet. It also reduces the chance of someone opening a hot radiator neck. On a 2014 X‑TRAIL, all filling and pressure control happens at the translucent coolant reservoir, so there’s no removable cap on the radiator to find or replace.

If searching for a “radiator-cap” for this model, the correct part is the coolant reservoir cap (pressure cap). It’s worth checking the cap during regular servicing: look for a perished seal, damaged spring, or staining from vapour leaks. Replace only with a cap that matches the specified pressure rating and design for the T32 X‑TRAIL (petrol or diesel as applicable). The exact rating is printed on the original cap and in the service data for the engine variant, using the wrong pressure can cause overheating, hose collapse, or premature component wear.

• Common signs the cap may be failing: coolant smell after driving, dampness or crust around the reservoir neck, fluctuating temperature gauge, the reservoir overfilling or hoses going flat when cool.
• Basic care: only open the reservoir cap when the engine is completely cold, crack it slowly to release any residual pressure. Inspect the O‑ring for cracks or flattening and replace the cap if in doubt. After refitting, run the engine to operating temperature and check for leaks.

Technical references: Nissan X‑TRAIL (T32) Service Manual, Cooling System (CO) — describes the sealed radiator and the pressure cap on the reservoir, Nissan Owner’s Manual (T32), “Engine coolant” section — shows fill/bleed points and warns to open only the reservoir cap when cool. These documents confirm there is no serviceable radiator-cap on the radiator for the 2014 model.

Popular questions about the 2014 Nissan X‑TRAIL radiator-cap

Does the 2014 X‑TRAIL have a radiator-cap?
No. The radiator is sealed. The pressure cap is fitted to the coolant reservoir (expansion tank) and handles pressure relief and vacuum return for the whole system.

Where’s the coolant cap and what cap should be used?
The cap is on the translucent reservoir at the front of the engine bay. Use a genuine or equivalent cap that matches the pressure rating printed on the original cap and specified for the T32 engine variant. Ratings commonly sit around 0.9–1.1 bar, but always confirm against the vehicle’s label or service information.

When should the reservoir cap be replaced?
There’s no fixed kilometre interval, but it should be inspected at every coolant service or if there are cooling issues. Replace it if the seal is cracked or flattened, the spring feels weak, or there are signs of leakage or pressure loss.