BTR4022 - Heater Bypass Coolant Valve – V8 by Land RoverEngine Part Land Rover Range Rover Discovery, Range Rover

BTR4022 - Verwarmingsbypass Koelvloeistofklep – V8

- €82,10

€82,10

€82,10 - €82,10

€82,10

Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.

Verwarming Bypass Koelvloeistofklep voor V8 benzinemotoren.

Deze vacuümbediende klep is geïnstalleerd in het HVAC-koelvloeistofcircuit en regelt de stroom van motorkoelvloeistof naar de verwarmingsradiator. In de bypass-stand leidt het de koelvloeistof weg van de verwarmingsradiator; wanneer geopend, laat het warme koelvloeistof door, wat cabineverwarming mogelijk maakt. De klep wordt bediend door het vacuümcircuit van de verwarmingsregeling en werkt samen met de verwarmingsregelingssolenoïde.

Vehicle Model Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic tot 1994

Fitment Notes DISCOVERY 1 1989-1998 — Verwarmingsslangen, V8 EFI/TDi/Dubbele carburateur, t/m VIN MA081992
RANGE ROVER CLASSIC 1992-1994 — Verwarmingsslangen, V8 Benzine, vanaf VIN MA647645

Alternative Codes

BTR4022

In stock 1 unit

1 · 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 BTR4022 heater bypass coolant valve and what does it do?

The BTR4022 is a vacuum-operated valve in the V8 HVAC coolant circuit that controls coolant flow to the heater core. In the bypass position it diverts coolant away from the core; when commanded open it lets hot coolant through for cabin heating. It works with the heater control vacuum circuit.

Which Land Rovers does this coolant valve fit?

The BTR4022 fits the Discovery 1 V8 up to VIN MA081992 and the Range Rover Classic V8 petrol from VIN MA647645. Confirm your VIN before ordering, as the heater circuit changed during production.

What are the signs the heater coolant valve needs replacing?

A failing heater bypass valve typically sticks or its vacuum diaphragm perishes, leaving you with no cabin heat or heat that can't be shut off. Coolant weeping from the valve body is another common sign on these V8 Discovery 1 and Range Rover Classic models.

Where does this valve sit in the heating system?

The BTR4022 sits in the cabin heating circuit between the engine coolant feed and the heater core, actuated by the heater control vacuum line. It typically works alongside the heater control solenoid to switch the core between bypass and heating.