YWB10027L - Relay – 4-Pin – Yellow or Black, White Stripe

- €4,40

€4,40

€4,40 - €4,40

€4,40

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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.

4-Pin Relay is a multi-purpose electromechanical switching relay used throughout the vehicle's electrical system, where a low-current control signal energises the coil to switch a separate higher-current circuit on or off.

The four-terminal layout provides a single normally-open contact, with two coil terminals and two switched-load terminals, suiting general-purpose switching of loads such as lighting, horn, fuel-pump and cooling-fan circuits. Operates on the 12V system. Originally supplied in yellow and now supplied in black with a white stripe.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Land Rover Discovery 2 1998-2004 (L318)
Range Rover Classic up to 1994
Range Rover Classic 1994-2001 (P38)
Range Rover 2002-2012 (L322)

Alternative Codes

YWB10027LYWB10027

In stock 37 units

27 · Gouda 10 · 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 YWB10027L 4-Pin Relay used for on a Land Rover?

The YWB10027L is a general-purpose 4-pin electromechanical relay used across a wide range of circuits on Land Rovers. A low-current coil signal switches a separate higher-current load, commonly powering lights, horns, fuel pump, or cooling fan circuits on the 12V system.

What replaced the original yellow YWB10027 relay?

The YWB10027L is the current replacement for the original yellow YWB10027. The 'L' suffix marks the updated version, now supplied in black with a white stripe. YWB10027 is confirmed in the alternative codes; both are electrically equivalent 4-pin relays.

How do I know which relay is failing on my Land Rover?

A failed relay typically causes a circuit to stop working entirely, the relay buzzing or chattering, or no click when the load is activated. YWB10027L is common across Defender, Discovery 1 and 2, Range Rover Classic, P38, and L322. Swapping in a known-good relay is a quick diagnostic step.