Womala Thermostat Assembly LR005631 for Land Rover

Product Overview

The Thermostat Housing Assembly LR005631 is an OE-grade cooling system component engineered for select for Land Rover vehicles equipped with the 4.4L AJ-V8 petrol engine (also compatible with 4.2L supercharged V8 variants). This complete assembly houses the thermostat element, coolant temperature sensor, and required sealing O-rings in a single ready-to-install unit. The thermostat opens at its calibrated temperature to route coolant to the radiator, while the temperature sensor provides coolant temperature data to the engine management system and dashboard instrumentation. LR005631 is the current replacement part, superseding 4646010, 4536880, and 1316378.

Key Features

• Complete assembly – includes thermostat, housing, coolant temperature sensor, and sealing O-rings

• OE-grade quality – manufactured to original Land Rover specifications

• Direct-fit replacement – matches factory mounting points; no modifications required

• For 4.4L AJ-V8 & 4.2L Supercharged V8 engines – precision-engineered for this engine family

• Housing Material – PA66 (plastic) with upgraded aluminum versions available

• Restores cooling system performance – prevents overheating or running too cool

OE Cross-Reference

Vehicle Fitment

Engine compatibility:

• 4.4L V8 Petrol (AJ-V8 / Jaguar V8)

• 4.2L Supercharged V8 Petrol

⚠️ Important: This thermostat housing fits Discovery 3 / LR3 (L319) and Range Rover Sport (L320) with 4.4L V8 and 4.2L supercharged V8 engines. It does not fit the full-size Range Rover L322. Fitment varies by model year, production date, and VIN range.

Signs of Failure

• Engine overheating – thermostat stuck closed, restricting coolant flow

• Engine running too cool – thermostat stuck open, preventing engine from reaching operating temperature

• Poor fuel economy – rich mixture due to engine not reaching operating temperature

• Coolant leaks – visible drips from thermostat housing area

• Irregular engine temperatures – gauge fluctuates unpredictably

💡 The original plastic housing can warp or crack over time due to heat cycling, leading to leaks and potential overheating. Upgraded aluminum versions are available for enhanced durability

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Critical – Verify Your VIN Before Ordering

Thermostat housings are VIN‑, engine‑, and model‑year‑specific. Variations in engine type (4.4L V8 vs. 4.2L supercharged), production date, and VIN range affect fitment. Provide your VIN – our team confirms exact compatibility before dispatch. We cannot accept returns for misordered parts without VIN verification.

💡 Installation Tip: Professional installation recommended. Always replace sealing O-rings when installing a new housing (included with most versions). Recommended to flush the cooling system and refill with Genuine Land Rover coolant during installation. Torque housing retaining bolts to 10 Nm-.

Technical Specifications

Why Choose Us

Contact us for bulk orders or VIN‑checked quotes.

Specifications subject to change; images for reference only.Aftermarket replacement – not affiliated with Jaguar Land Rover.

Frequently Asked Questions

• Extensive Industry Experience: 13 years specializing in Auto Parts auto parts with precise product matching and technical solutions.
• Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
• Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
• Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Womala and Hella.