Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.
PRC3366 - Switch Blue by Land RoverElectrical Part Land Rover Range Rover Defender, Series

PRC3366 - Temperature Sensor – Blue

- €14,00
€14,00
€14,00 - €14,00
€14,00
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Coolant Temperature Sensor - screws into the thermostat housing as part of the engine cooling system.

It senses coolant temperature in the thermostat housing and supplies that signal to the vehicle's temperature sensing circuit. Identified by its blue body, which distinguishes it from the other temperature switches used in the same position. Fitted to petrol and naturally aspirated diesel applications, including those with air conditioning.
Vehicle Model Land Rover Defender up to 2016
Land Rover Series 2 and 3
Fitment Notes DEFENDER 1986-2006 — 2.25L 4 Cyl Petrol (with air conditioning), 2.5L 4 Cyl Petrol, 2.5L 4 Cyl NA Diesel. Temperature sensor/switch, blue. Fitted in the thermostat housing. Qty 1 per vehicle.
SERIES II/III — 2.25L petrol or 2.25L diesel, blue switch.
Alternative Codes
PRC3366

In stock 9 units
9 · 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 PRC3366 temperature sensor used for?
The PRC3366 is the blue temperature sensor/switch for the Defender and Series vehicles. It reads coolant temperature from the thermostat housing and signals the gauge or system. One is fitted per vehicle.
Which vehicles does this blue temperature sensor fit?
This blue temperature switch fits the Defender (1986-2006) 2.25 petrol with AC, 2.5 petrol and 2.5 naturally aspirated diesel, plus Series II/III 2.25 petrol or diesel. Match the blue colour and engine before ordering.
What thread size does this temperature sensor use?
This temperature sensor uses an M22 x 1.5 thread and fits into the thermostat housing. It's the genuine Land Rover blue switch, and a non-original version is available if you're switching from the genuine part.
What are the signs the temperature sensor has failed?
Temperature sensors fail as the element drifts or the switch sticks, typically causing wrong gauge readings or a warning on the Defender and Series. Replace if the reading is erratic or the switch no longer operates.

Frequently Bought With

Products most often purchased alongside this one.

4 items
527110 - Thermostat Gasket
Aftermarket

527110 - Thermostat Gasket

€1,00 excl. VAT
532453 - Thermostat – 2.25 Petrol – 74C
Aftermarket

532453 - Thermostat – 2.25 Petrol – 74C

€21,40 excl. VAT
ERR3682 - Thermostat Housing Gasket
Aftermarket

ERR3682 - Thermostat Housing Gasket

€0,90 excl. VAT
PRC6663 - Coolant Temperature Transmitter – 4-Cyl
Aftermarket

PRC6663 - Coolant Temperature Transmitter – 4-Cyl

€22,10 excl. VAT