4413478 | 37mm Thermostat Gasket - 4.2 & 4.4 V8 | Discovery 3, Range Rover Sport
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: 4413478 - 37mm Thermostat Housing Gasket
4413478 is a 37mm thermostat housing gasket fitted to thermostat housings on 4.2 Petrol V8 supercharged and 4.4 AJ Petrol V8 220KW engines. It sits between the thermostat housing and the cylinder head to seal the coolant passage, preventing leaks and ensuring correct thermostat operation. Inspect the gasket whenever the thermostat housing is removed and replace it if it shows signs of damage or compression.
Compatibility
- Discovery 3 (2005-2009) - 4.4 AJ Petrol V8 220KW
- Range Rover L322 (2002-2009) - 4.2 Petrol V8 Supercharged (From VIN 6A000001)
- Range Rover Sport (2005-2009) - 4.2 Petrol V8 Supercharged, 4.4 AJ Petrol V8 220KW
Frequently Asked Questions
The 4413478 gasket seals the 37mm thermostat housing to the cylinder head, preventing coolant leaks and helping maintain correct coolant flow through the thermostat. Inspect the gasket when the thermostat housing is removed and replace if it appears damaged or compressed.
| Model | Variant |
|---|---|
| Land Rover Discovery 3 (2005-2009) | 4.4 AJ Petrol V8 220KW |
| Land Rover Range Rover L322 (2002-2009) | 4.2 Petrol V8 Supercharged (From VIN 6A000001) |
| Land Rover Range Rover Sport (2005-2009) | 4.2 Petrol V8 Supercharged; 4.4 AJ Petrol V8 220KW |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Replace the gasket whenever the thermostat housing is removed or if there is any sign of coolant leakage; inspect it during cooling system servicing and fit a new gasket if it looks worn or damaged.
- C8 products are usually supplied by Britpart.
- L8 products are genuine Land Rover parts.
- Z8 products are normally supplied by Allmakes.
All products and accessories available on LRDirect.com come with a 2-year warranty.