Parts for your 2017 Nissan Navara-Radiator

2017 Nissan Navara Radiator — what it does and how to look after it

Yes, the 2017 Nissan Navara (D23/NP300) absolutely runs a conventional liquid-cooling system with a front-mounted aluminium radiator. This is documented in Nissan’s D23 Owner’s Manual and Service Manual, and reflected in the genuine parts catalogues that list the radiator, cap, hoses, thermostat, fan(s), and an integrated or companion transmission oil cooler on auto models. So the radiator is very much relevant to this ute.

The radiator’s job is simple but vital: it sheds the heat the diesel or petrol engine makes, keeping temperatures in the sweet spot whether you’re crawling a job site, towing a boat, or knocking over long kilometres in Aussie or Kiwi heat. Coolant flows from the engine through the radiator core, where passing air and the cooling fan (electric or viscous, depending on variant) pull heat out before the coolant returns to the block. That stable temp helps power, emissions, and longevity.

For servicing, stick with Nissan-approved long-life coolant (often the blue, silicate-free type). As per Nissan’s schedule for the D23, the factory fill typically runs to around 160,000 km or 7 years, then changes are shorter (about every 80,000 km or 4 years). Always confirm intervals in the owner’s handbook for your VIN and market. Use a 50/50 premix or mix concentrate with demineralised water, and never blend random coolant types.

Regular checks pay off: look for dried white/pink crust at hose joints, weeps at the plastic end tanks, damaged fins, or swelling hoses. Make sure the radiator cap seals properly, the fan operates, and the shroud is intact. If the coolant looks rusty, milky, or oily, it’s time to investigate. On many auto Navaras, the radiator assembly also manages ATF temperature—so any cross-contamination or a leaking internal cooler is a priority fix.

Replacing the radiator? Flush the system, swap suspect hoses and the cap while you’re in there, and refill with the correct coolant. Bleed the system properly: heater on hot, fill slowly, use the bleed points where fitted, and run it up to temp with the bonnet up until the thermostat opens and air clears. Recheck the level after a short drive and again the next morning. Dispose of old coolant responsibly—it’s toxic to pets and wildlife.

• Good times to replace: repeated overheating, persistent top-ups, damaged tanks/fins, or ATF-in-coolant on autos.
• Consider adding or servicing an auxiliary trans cooler if you tow heavy in hot conditions.

Popular questions about 2017 Nissan Navara radiators

What coolant does a 2017 Navara use, and how often should it be changed?
Most D23 Navaras specify Nissan-approved long-life coolant (commonly the blue, silicate-free type). The factory fill is often rated to around 160,000 km or 7 years, with subsequent changes about every 80,000 km or 4 years. Always verify the exact interval and spec in your owner’s manual for your engine and market.

How do you bleed the cooling system after a radiator replacement?
Fill slowly through the radiator or header tank, set the heater to hot, and use any bleed screws if fitted. Start the engine, let it reach operating temp so the thermostat opens, and watch for steady flow and heat in the heater core. Top up as the level drops, squeeze upper hoses to coax bubbles out, then cap it, road test, and recheck the level next morning.

Can a failing radiator affect the automatic transmission?
On many auto D23s, the radiator assembly includes a transmission fluid cooler. If that cooler leaks internally, ATF and coolant can cross-contaminate, risking gearbox damage. Signs include milky coolant, rising trans temps, or slipping shifts. Stop driving and fix immediately, some owners add an auxiliary cooler for heavy towing or hot climates.