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IGM100000 - Switch – Low Ratio Detection

Original price - Original price €77,50
Original price
€77,50
€77,50 - €77,50
Current price €77,50
Aftermarket Part
Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.
Low Ratio Detection Switch - the transfer box range-detection switch, mounted on the front housing of the transfer box.

It senses whether the transfer box is engaged in high or low ratio and signals the selected range to the vehicle, driving the dashboard low-range indicator. A plunger-type switch actuated by the range-selection mechanism.
Vehicle Model Land Rover Defender up to 2016
Land Rover Defender New 2020+
Land Rover Discovery 2 1998-2004 (L318)
Fitment Notes DEFENDER 1987-2016 — Transfer box low ratio (high/low) detection switch, mounts on transfer box front housing
DISCOVERY 2 1998-2004 — Transfer box low ratio detection switch
Alternative Codes
IGM100000IGM100010RYP500420

In stock 2 units
2 · 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 does the low ratio detection switch do?
The low ratio detection switch senses whether the transfer box is in high or low range and signals the selected ratio to the vehicle. It's a plunger-type switch on the front housing of the transfer box, and it drives the dashboard low-range indicator light.
Where is the low ratio detection switch fitted?
The low ratio detection switch mounts on the front housing of the transfer box, where the range-selection mechanism actuates it. It fits the Land Rover Defender up to 2016 and the Discovery 2 (1999-2004), sitting in the transfer box rather than the main gearbox.
How do I know if the low ratio detection switch has failed?
A failed low ratio detection switch typically shows up as the dashboard low-range light not coming on in low ratio, or staying on in high. Because it's a simple plunger switch, contamination or a worn plunger can stop it signalling the range correctly.
How do I confirm this switch fits my vehicle?
This switch fits the Land Rover Defender up to 2016 and Discovery 2 transfer boxes. Confirm your transfer box variant against your VIN before ordering, as low ratio detection switch design can differ between transfer box types.