LANDNOVO LR005631 Thermostat Housing Assembly for Land Rover LR3 & Range Rover Sport 4.4L V8 | Premium OE Replacement

LANDNOVO — Precision in Motion. Engineered by GB.

Brand New – 100% Original Equipment Performance.

Is your Land Rover LR3 or Range Rover Sport experiencing coolant leaks, overheating, or a stuck thermostat? The culprit is often a failed thermostat housing assembly. The LANDNOVO LR005631 Thermostat Housing Assembly is a brand new, premium replacement engineered to restore your vehicle's cooling system performance and engine protection.

Manufactured to OE specifications, this thermostat housing assembly delivers 100% original equipment function, performance, and durability. It is a complete drop-in replacement for the original unit (OE LR005631 / 4646010 / 4536880 / 1316378) and includes the thermostat for a complete repair.

What Does the Thermostat Housing Assembly Do?

The thermostat housing assembly is a critical component of your vehicle's engine cooling system. It houses the thermostat, which regulates the flow of coolant between the engine and the radiator. When the engine is cold, the thermostat remains closed, allowing the engine to warm up quickly. Once the engine reaches operating temperature, the thermostat opens, allowing coolant to flow through the radiator to maintain optimal engine temperature. A failed thermostat housing can cause coolant leaks, overheating, or poor fuel economy.

Key Features

• Brand New – high-quality materials, rigorously tested
• 100% OE Performance – direct replacement for OE LR005631 / 4646010 / 4536880 / 1316378
• Complete Assembly – includes thermostat housing and thermostat
• Durable Construction – built to withstand extreme engine temperatures and coolant exposure
• Leak-Free Design – precision-machined sealing surfaces ensure a secure, long-lasting seal
• Plug & Play – direct fit installation, no modification required
• British-Engineered Precision – Designed by GB
• 12-Month Warranty – peace of mind

Fitment

Vehicle	Chassis	Years	Engine
Land Rover LR3 / Discovery 3	L319	2005–2009	4.4L V8 Petrol (AJ-V8)
Land Rover Range Rover Sport	L320	2006–2009	4.4L V8 Petrol (AJ-V8)
Land Rover Range Rover	L322	2006–2009	4.4L V8 Petrol (AJ-V8)

Note: For 4.4L V8 petrol engines only. Also compatible with some 4.2L Supercharged V8 variants. Confirm compatibility with your VIN before purchase.

OE Cross-Reference

OE Number	Type
LR005631	Primary
4646010	Supersession
4536880	Supersession
1316378	Supersession
4H238A504AC	Cross-reference
LR100352	Cross-reference
LR005631G	OEM Branded
LR005631R	Aftermarket

Specifications

• Type: Engine Coolant Thermostat Housing Assembly
• Includes: Thermostat housing and thermostat
• Opening Temperature: 92°C
• Material: High-grade composite / metal
• Condition: Brand New – 100% OE Performance
• Warranty: 12 Months

Symptoms of a Failing Thermostat Housing

• Coolant leak – visible coolant dripping from the thermostat housing area
• Overheating engine – the engine temperature gauge rises above normal operating range
• Slow warm-up – the engine takes longer than usual to reach operating temperature
• Poor fuel economy – the engine runs rich due to incorrect temperature regulation
• Check engine light – the dashboard displays a cooling system-related warning

Installation Tips

• Professional installation recommended.
• Drain coolant before removal.
• Clean the mating surface thoroughly before installing the new housing.
• Use a new gasket or seal if applicable.
• After installation, refill with correct Land Rover-approved coolant and perform system bleed procedure.

LANDNOVO — Precision | Guaranteed | Durability