ERR4686 - Filler Plug – Plastic by AllmakesCooling or Heating Part Land Rover Range Rover Defender, Discovery, Range Rover, Series

ERR4686 - Vulplug – Kunststof

- €3,70

€3,70

€3,70 - €3,70

€3,70

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Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Vulplug die het vul- en ontluchtingspunt van het motorkoelsysteem afdicht, gemonteerd op het thermostaathuis en de radiator.

Deze plastic plug sluit de bijvul- en ontluchtingspoort af en handhaaft de integriteit van het koelsysteem onder bedrijfsdruk bij Tdi- en V8-toepassingen. Hij wordt afgedicht door O-ring ESR4685, die elke keer dat de plug wordt verwijderd moet worden vernieuwd.

Vehicle Model Land Rover Defender t/m 2016
Land Rover Discovery 1 1989-1998 (L318)
Land Rover Discovery 2 1998-2004 (L318)
Range Rover Classic t/m 1994
Range Rover Classic 1994-2001 (P38)
Land Rover Series 2 en 3

Fitment Notes DEFENDER 1987-2006 — Radiateur (2.5 TDi niet-EGR & 4-cil TDi); Thermostaatbehuizing (2.5L 300 TDi)
DISCOVERY 1 1989-1998 — Thermostaatbehuizing (2.5 TDi EGR / 300 TDi), tot VIN MA081992
RANGE ROVER P38 1994-2001 — Radiateur & koelsysteem, 4.0L & 4.6L V8 Benzine
RANGE ROVER CLASSIC 1992-1994 — Thermostaatbehuizing 2.5L TDi, vanaf VIN JA610294

Alternative Codes

ERR4686607024ARA2404BR 3485BR 3485BNTC4609

In stock 4 units

3 · Gouda 1 · 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 ERR4686 filler plug and what does it do?

The ERR4686 filler plug is a plastic plug that seals the fill and bleed point of the cooling system, fitted to the thermostat housing or radiator. It closes the top-up port and holds cooling system pressure on Tdi and V8 applications across the Defender, Discovery and Range Rover range.

Does the filler plug need a new seal when refitted?

Yes, the filler plug is sealed by a separate O-ring that should be renewed every time the plug is removed. Reusing an old O-ring typically causes coolant seepage or pressure loss from the bleed point on a 300TDi or V8 cooling system. The plug itself is reusable if undamaged.

Which cooling system does the ERR4686 fit on?

The ERR4686 fits the radiator on Tdi Defenders and the thermostat housing on 300TDi engines, plus the cooling system on Range Rover P38 4.0 and 4.6 V8 petrol. Note the Discovery 1 application runs to VIN MA081992, so check your VIN before ordering.