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NTC3858LR - Coolant Adaptor – Reducer by Land RoverEngine Part Land Rover Range Rover Defender, Discovery, Range Rover

NTC3858LR - Coolant Adaptor – Reducer

- €53,40
€53,40
€53,40 - €53,40
€53,40
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Coolant Adaptor (Reducer) - threaded adaptor in the engine oil cooler circuit at the radiator.

This threaded reducer adaptor connects the engine oil cooler pipe to its port at the radiator side tank, stepping between the two thread sizes to join the cooler line to the radiator. It carries oil cooler flow to and from the radiator-mounted cooler.

Supplied individually.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — 2.5L 4 Cyl, 3.5L V8 Petrol; not Td5
DISCOVERY 1 1989-1998 — Diesel, to VIN LA081991
RANGE ROVER CLASSIC 1986-1994 — 2.4L VM Diesel, 3.9L V8 EFI Petrol
Alternative Codes
NTC3858NTC3858LR

In stock 2 units
2 · Gouda 0 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What is the NTC3858 coolant adaptor used for?
The NTC3858 is a threaded reducer adaptor in the engine oil cooler circuit. It connects the oil cooler pipe to its port at the radiator side tank, stepping between two thread sizes to join the cooler line to the radiator. It's a genuine Land Rover part, sold individually.
Where does this coolant adaptor sit on the engine?
It sits at the radiator side tank, where the engine oil cooler line meets the radiator-mounted cooler. The adaptor forms the threaded junction between the oil cooler pipe and its port, carrying oil cooler flow to and from the radiator. On these models the cooler is integrated into the radiator end tank.
Which Land Rovers does the NTC3858 fit?
It fits early Defender 2.5L 4-cylinder and 3.5L V8 petrol from 1987 to 2006 (not Td5), Discovery 1 diesel up to VIN LA081991, and Range Rover Classic from 1986 to 1994. Check your VIN against the Discovery 1 cutoff to confirm before ordering.

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