AJ811788-Q - Thermostat by QH Land Rover Range Rover

AJ811788-Q - Thermostat – 3.5/4.2L V8 Petrol

- €14,30

€14,30

€14,30 - €14,30

€14,30

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 QH

Thermostat for the 3.5/4.2L V8 petrol engine, naturally aspirated and supercharged, supplied with its water outlet housing.

Located in the engine cooling circuit, the thermostat regulates coolant flow to the radiator, holding the engine at its correct operating temperature by opening as the coolant warms and restricting flow while the engine is cold.

Fitment Notes SUPERSEDED — use AJ811788-R. JAGUAR Thermostat & water outlet, 3.5/4.2L V8 Petrol NA/SC. Models: XK (X150), S-TYPE (X200), XF (X250), XJ (X350 2003-2009)

Alternative Codes

AJ811788-QAJ811788

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 thermostat do?

This thermostat regulates coolant flow to the radiator on the Jaguar 3.5/4.2L V8 petrol engine, opening as the coolant warms to hold the engine at operating temperature. It's supplied with the water outlet housing and fits NA and supercharged V8s.

Has this QH thermostat been superseded?

Yes, this QH reference (AJ811788-Q) has been superseded by AJ811788-R, the current replacement thermostat for the same Jaguar 3.5/4.2L V8 petrol application. If you're ordering new stock, use AJ811788-R to get the up-to-date part.

Which Jaguar models does it fit?

This thermostat fits Jaguar XK (X150), S-TYPE (X200), XF (X250) and XJ (X350 2003-2009) with the 3.5/4.2L V8 petrol engine, naturally aspirated and supercharged. For current supply, note the supersession to AJ811788-R.

AJ811788-Q - Thermostat – 3.5/4.2L V8 Petrol

Job kits containing this part

Frequently asked questions

Alternative & Related Options