Parts for your 2017 Nissan Serena-Radiator hose

2017 Nissan Serena radiator hose — purpose, servicing and replacement

Technical sources confirm the 2017 Nissan Serena is fitted with conventional radiator hoses. The Nissan C27 Serena Service Manual (CO — Cooling System) details an upper and lower radiator hose for the MR20DD 2.0‑litre engine used in 2017 S-HYBRID models, and the Nissan FAST parts catalogue lists corresponding hose part numbers and clamps. Major aftermarket catalogues for C27 (e.g., Gates/Dayco) likewise specify upper and lower radiator hoses for 2016–2018 Serena. So, a radiator hose is absolutely relevant on this vehicle.

On this model, the radiator hoses carry coolant between the engine and the radiator under the bonnet, managing engine temperature during everything from school runs to long Kiwi or Aussie highway stints. Healthy hoses help the Serena warm up quickly, hold steady temperature in traffic, and keep the cabin heater working on chilly mornings.

For servicing, inspection should be part of every scheduled service or at least every 10,000–15,000 km. Hoses typically last 5–7 years, so many 2017 vehicles are now due on age alone. A sensible plan is to replace the upper and lower hoses as a pair, along with fresh clamps and a coolant change, by 100,000–150,000 km or sooner if wear is found.

• What to check: surface cracks, perishing, swelling, oil contamination, soft spots near ends, white crust or dried coolant at joints, and a collapsed lower hose after a hot run.
• Best practice: use quality hoses matched to the MR20DD, fit new spring or quality worm clamps, and refill with Nissan Genuine Blue Long Life coolant (premix or 50/50 to spec).

When replacing, allow the engine to cool fully. Drain coolant cleanly, swap hoses one at a time to avoid mixing up routing, and clean the necks on the radiator and thermostat housing. Don’t over-tighten clamps on the plastic radiator tank necks—just nip them up evenly. Bleed air thoroughly: heater set to hot, run at fast idle, top up as bubbles purge, and confirm radiator fan cycles and the temperature gauge stays normal. After a couple of drives, recheck clamp tension and coolant level.

Early signs owners might notice include a sweet coolant smell, visible drips under the front, temperature creeping on long climbs, or the low coolant light. Sorting hoses before they let go saves the Serena from overheating and saves the wallet from bigger repairs.

• Does the 2017 Serena e-POWER use radiator hoses too?
  While e-POWER arrived slightly later, both the MR20DD S‑HYBRID and e‑POWER variants use coolant hoses. e‑POWER has a petrol engine acting as a generator and additional thermal management for electrics, so hoses are still part of the cooling system.
• How often should radiator hoses be replaced on a 2017 Serena?
  Inspect every service, plan replacement about every 5–7 years or 100,000–150,000 km, and replace immediately if there’s swelling, cracking, leaks, or soft spots. Age hardening is common even if kilometres are low.
• What coolant should be used after hose replacement?
  Use Nissan Genuine Blue Long Life Coolant (LLC) that meets the C27 Serena spec. If concentrate is used, mix to 50/50 with demineralised water. Always bleed air properly to prevent hot spots and heater issues.