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MHK100920B - Sensor - Hego by BoschElectrical Part Land Rover Range Rover Discovery

MHK100920B - Lambda Sensor – V8 – Front

- €116,50
€116,50
€116,50 - €116,50
€116,50
OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Brand Bosch
Lambda Sensor (oxygen sensor) fitted to the exhaust downpipe, upstream of the catalytic converter, in the engine management circuit of the 4.0/4.6L V8 petrol engine.

The front sensor measures the oxygen content of the exhaust gas as it leaves the cylinder head and returns this signal to the engine control module. The module uses it to hold the air/fuel mixture in closed-loop control, keeping fuelling accurate and combustion efficient.
Vehicle Model Land Rover Discovery 2 1998-2004 (L318)
Fitment Notes DISCOVERY 2 1998-2004 — 4.0/4.6L V8 Petrol. HEGO oxygen/lambda sensor, on downpipe.
Alternative Codes
MHK100920BMHK100920

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

  • Netherlands / Belgium / Germany: 2–4 working days after dispatch.
  • Other EU countries + UK: 4–8 working days after dispatch.
  • Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

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 front lambda sensor do on the V8?
The front lambda sensor, a Bosch HEGO oxygen sensor, mounts on the exhaust downpipe upstream of the catalytic converter on the 4.0/4.6L V8 petrol Discovery 2. It reads oxygen content in the exhaust gas and sends the signal to the engine control module, which holds the air/fuel mixture in closed-loop control for accurate fuelling.
Which sensor position is this, and how many does the V8 use?
This is the front (upstream, pre-catalyst) Bosch lambda sensor for the 4.0/4.6L V8. These engines typically run one sensor per bank ahead of the catalytic converter, plus downstream sensors, so confirm which position you need. This part is the front HEGO sensor for the Discovery 2.
What are the signs of a failing lambda sensor?
A failing front lambda sensor on the V8 Discovery 2 typically shows as rough idle, higher fuel use, a stored fault code and a lit engine warning light. The Bosch sensor's response slows as it ages, so the ECM loses accurate fuel trim. Left unreplaced it usually forces open-loop running and raises emissions.
Can the Bosch front lambda sensor be fitted at home?
The Bosch front lambda sensor can usually be fitted at home using a lambda socket or deep socket and penetrating oil, as the thread seizes in the hot downpipe. On the Discovery 2 V8 it's reached from underneath. Let the exhaust cool first and unplug the connector carefully to avoid damaging the wiring.

Alternative & Related Options

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