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MHK501050A - Sensor Assembly - Lambda by Autotec Components Land Rover Range Rover

MHK501050A - Lambda Sensor – Rear

- €71,60
€71,60
€71,60 - €71,60
€71,60
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 Autotec Components
Lambda Sensor - Rear (post-catalyst oxygen sensor) for the exhaust and engine management system of V6 and V8 petrol engines.

The sensor mounts in the front pipe and catalyst assembly, downstream of the catalytic converter. It does not trim fuelling directly; the engine control module compares its signal with that of the pre-catalyst sensor to evaluate catalyst conversion efficiency and to set the associated emissions monitor.

The unit is heated so that monitoring becomes active shortly after a cold start. It is not serviceable and is replaced complete.
Vehicle Model Land Rover Discovery 3 2005-2009 (L319)
Range Rover Sport 2005-2013 (L320)
Fitment Notes DISCOVERY 3 2005-2009 — 4.0L V6 & 4.4L V8 AJ Petrol; rear lambda/O2 sensor, front pipe/catalyst. NAS (North America) only, from V 7A000001
RANGE ROVER SPORT L320 2005-2009 — 4.2L V8 Supercharged & 4.4L V8 AJ Petrol; rear lambda/O2 sensor. North America only, from V 7A000001
Alternative Codes
MHK501050AMHK501050

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 is the MHK501050 rear lambda sensor?
The MHK501050 is a rear (post-catalyst) lambda sensor that mounts in the front pipe and catalyst assembly, downstream of the converter. It doesn't trim fuelling directly, it lets the ECU compare pre and post-cat oxygen to monitor catalyst efficiency on Discovery 3 and Range Rover Sport L320 petrol.
How is this different from the front lambda sensor?
This is the rear, post-catalyst sensor, not the upstream one that trims fuelling. It monitors catalyst efficiency by reading exhaust gas after the converter. Ordering the wrong position is common, so confirm you need the post-cat sensor before buying this rear unit.
Does this rear lambda sensor fit my vehicle?
This sensor fits the Discovery 3 4.0L V6 and 4.4L V8 and the Range Rover Sport L320 4.2 supercharged and 4.4 V8, in NAS (North America) specification only, from VIN 7A000001. Confirm your market and VIN before ordering.
Why does a rear lambda sensor fail?
Rear lambda sensors typically fail from ageing, exhaust contamination, or heat cycling, which sets a catalyst-efficiency fault and the engine light. Because it monitors the converter rather than fuelling, a faulty sensor usually shows as an emissions code on the Discovery 3 or Range Rover Sport.