Thermostat Housing ERR3479 for 300Tdi

The Thermostat Housing Assembly ERR3479 is a direct-replacement cooling system component designed for Land Rover vehicles equipped with the 2.5L 300Tdi diesel engine without air conditioning. This housing secures the thermostat and directs coolant flow, helping regulate engine operating temperature for reliable performance and longevity.

A cracked, warped, or leaking thermostat housing can lead to coolant loss, overheating, or inconsistent temperature control. Replacing the housing during thermostat service or cooling system repairs helps restore proper coolant circulation and prevents future leaks.

This assembly is intended for non–air-conditioned 300Tdi applications only and is suitable for maintenance, repair, or restoration work.

Vehicle Fitment

• Defender 90/110/130 (1987–2006) – 300Tdi, without A/C

• Discovery I (1989–1998) – 2.5L 300Tdi, without A/C

• Range Rover Classic (1992–1994) – 2.5L 300Tdi, without A/C

Supersession Part Numbers

No supersessions found.

FAQ

Does this fit vehicles with air conditioning?
No. This thermostat housing is designed for 300Tdi engines without air conditioning only.

Is the thermostat included?
No. This listing includes the thermostat housing assembly only. The thermostat is sold separately.

When should the thermostat housing be replaced?
Replacement is recommended if the housing is leaking, cracked, warped, or being serviced during a cooling system overhaul.

Part Number: ERR3479

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