Parts for your 2015 Nissan Serena-Radiator

2015 Nissan Serena Radiator — What It Does and How to Look After It

Based on technical references including the Nissan C26 Serena Factory Service Manual (CO – Cooling System) and the Nissan FAST/EPC parts catalogue (radiator assembly group 21460), the 2015 Nissan Serena (C26, including S-HYBRID variants with the MR20DD 2.0‑litre petrol engine and Xtronic CVT) is fitted with a front‑mounted aluminium radiator as part of its liquid cooling system. So yes — a radiator is absolutely relevant and used on this vehicle.

The radiator’s job is straightforward but critical: it sheds engine heat into the airflow so the MR20DD runs at a stable operating temperature. That protects head gaskets and alloy components, keeps oil viscosity in the sweet spot, and ensures the heater works properly. On some Serena variants, small transmission cooler lines may run to a heat exchanger at the radiator, helping the CVT manage temperatures during stop‑start urban work and family trips.

For servicing, owners should stick with the correct coolant type and intervals. Nissan specifies a long‑life, silicate‑free coolant (often the blue genuine premix) that typically runs a long initial interval, then shorter subsequent intervals. Many workshops in Australia and New Zealand follow the 10 years/160,000 km initial change and then every 5 years/80,000 km thereafter, but imported cars and severe driving (hot climate, towing, lots of idling) can justify earlier changes. Mixing coolant types is a no‑go