Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.

ERR3443 - Viscous Fan Coupling

Original price - Original price €108,90
Original price
€108,90
€108,90 - €108,90
Current price €108,90
Aftermarket Part
Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.
Viscous Fan Coupling drives the engine cooling fan on the 3.9L and 4.0L V8 EFI petrol engine.

The temperature-sensitive coupling varies fan speed with airflow temperature to regulate cooling. Secured by an M30 x 1.5 nut (35 mm across flats).
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 — 4.0L V8 EFI Petrol
DISCOVERY 1 1989-1998 — 3.9L V8 EFI Petrol, 35mm nut (to VIN MA081991)
RANGE ROVER CLASSIC 1992-1994 — V8 EFI Petrol, M30x1.5 35mm nut
Alternative Codes
ERR3443ERR3443X

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 does the Viscous Fan Coupling (ERR3443) do?
The Viscous Fan Coupling (ERR3443) drives the engine cooling fan on the 3.9L and 4.0L V8 EFI petrol engine. The temperature-sensitive coupling varies fan speed with airflow temperature to regulate cooling. Fitted to the Land Rover Defender up to 2016, Discovery 1 (1989-1998), and Range Rover Classic V8.
Where does the fan coupling sit?
The fan coupling sits between the water pump drive and the cooling fan at the front of the V8 engine. It threads onto the pump spindle and carries the fan. It's fitted to the Land Rover Defender up to 2016, Discovery 1, and Range Rover Classic V8 EFI applications.
What are the signs the viscous coupling is failing?
A failing viscous fan coupling typically causes engine overheating if it seizes loose, or excessive fan roar and drag if it locks up. On the V8 you may notice the fan spinning freely when cold. Replace ERR3443 if cooling performance drops on the Land Rover Defender or Discovery 1.