Parts for your 2018 Nissan Serena-Radiator

2018 Nissan Serena Radiator — Purpose and Servicing Tips

Yes, a radiator is fitted to the 2018 Nissan Serena (C27) across its petrol MR20DD and e-POWER variants. This is documented in the Nissan Serena C27 Service Manual (Cooling System section), Nissan e-POWER System Description, and the Nissan parts catalogue listings for the C27 radiator assembly and cooling fans. Even the e-POWER model runs a petrol engine as a generator, so it still needs a conventional engine-cooling radiator, some trims also have a separate low-temperature circuit for the inverter/e-motor cooling.

The radiator’s job is to shed heat from the coolant circulating through the engine (and on some e-POWER models, to support thermal management of the generator engine and power electronics via dedicated circuits). Coolant absorbs heat in the engine, passes through the alloy radiator, and is cooled by airflow and electric fans before looping back. It keeps temperatures in the sweet spot for efficiency, performance, and long engine life, helping prevent overheating, head gasket dramas, and warped components.

For servicing in Australia or New Zealand, stick with Nissan Genuine Long Life Coolant (Blue), or an equivalent silicate-free OAT coolant that meets Nissan specs. Typical Nissan intervals are up to 7 years/160,000 km initially, then around 5 years/100,000 km thereafter, but always check the owner’s manual or service guide for your exact build. When replacing coolant, bleed the system properly to avoid air locks, inspect the radiator cap (usually ~1.1 bar), check all hoses and clamps, and verify both cooling fans kick in. A pressure test is a smart move if there’s any sign of leaks.

If the radiator needs replacing (stone strike, fin corrosion, internal blockage), choose quality OEM or well-reviewed aftermarket. Swap over the fan shroud and sensors carefully, use new O-rings where applicable, torque mounts to spec, and refill with the correct mix ratio. Only work on the system when the engine is stone cold and dispose of old coolant responsibly.

• Watch for overheating, low heater output, sweet coolant smell, or pink/blue residue near the end tanks.
• Keep the outside of the radiator clear of bugs and debris for better airflow.
• If you own an e-POWER model, note there may be a separate low-temp circuit—service procedures can differ slightly.

Popular questions

Does the 2018 Nissan Serena e-POWER have a radiator?
Yes. The e-POWER uses a petrol engine as a generator, which still needs a conventional engine-cooling radiator. Many e-POWER models also have an additional low-temperature loop for the inverter/e-motor, so you may see extra coolant lines or a separate heat exchanger up front.

What coolant should be used and how often should it be changed?
Use Nissan Genuine Long Life Coolant Blue (or an equivalent silicate-free OAT meeting Nissan specs). Typical guidance is up to 7 years/160,000 km initially, then around 5 years/100,000 km, but confirm in the owner’s manual for your exact vehicle and climate conditions.

How can someone tell if their Serena radiator needs replacement?
Common signs include rising temperature gauge, coolant smell, visible leaks or crusty residue on the end tanks, repeated top-ups, discoloured coolant, or bent/corroded fins. A workshop can pressure-test the system and check for internal blockages or cap failure.