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AJ811788-MR - Thermostat by MotoradCooling or Heating Part Land Rover Range Rover

AJ811788-MR - Thermostat – 4.2L V8 Petrol

- €21,10
€21,10
€21,10 - €21,10
€21,10
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 Motorad
Thermostat for the 4.2L V8 petrol engine, naturally aspirated and supercharged.

Fitted in the engine cooling circuit, the thermostat regulates coolant flow to the radiator, bringing the engine up to its correct operating temperature and holding it there by opening as the coolant warms.
Fitment Notes JAGUAR — Thermostat (Motorad), 4.2L V8 Petrol NA and Supercharged. Models: XK (X150), S-TYPE (X200), XF (X250), XJ (X350 2003-2009)
Alternative Codes
AJ811788-MR

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 this Motorad thermostat do?
This Motorad thermostat regulates coolant flow to the radiator on the Jaguar 4.2L V8 petrol engine, opening as the coolant warms to bring the engine up to operating temperature and hold it there. It's fitted in the engine cooling circuit.
Which Jaguar models use this Motorad thermostat?
This Motorad thermostat fits Jaguar XK (X150), S-TYPE (X200), XF (X250) and XJ (X350 2003-2009) with the 4.2L V8 petrol engine, naturally aspirated and supercharged. Part number AJ811788-MR.
What are the signs a thermostat needs replacing?
A thermostat typically needs replacing when the engine overheats (stuck closed) or is slow to warm up with poor heater output (stuck open). Both can trigger a temperature warning on the Jaguar V8. This Motorad unit is an OEM-quality replacement for the original.