LAND ROVER LR3 2005-2009 4.4L PETROL AJV8 ENGINE THERMOSTAT TUBE & HOUSING LR005631 LAND ROVER LR3 2005-2009 4.4L PETROL AJV8 ENGINE THERMOSTAT TUBE AND HOUSING ASSEMBLY COMES COMPLETE WITH THERMOSTAT HOUSING AND GASKET, AND COOLANT TEMPERATURE SENSOR NEW OEM BRITPART BRAND PART# LR005631 NOTE: WILL NOT FIT LAND ROVER SUPERCHARGED MODELS 4.2L WILL NOT FIT LR3 WITH COLOGNE 4.0L V6 Fits: LR3 / Discovery 3 | '05 - '09 | 4.4 AJV8 ENGINE LR4 / Discovery 4 | '10 - On | 4.4 AJV8 ENGINE Range Rover Sport | '06 - '09 | 4.4 AJV8 ENGINE Range Rover Sport | '10 - '13 | 4.4 AJV8 ENGINE The thermostat regulates your Land Rover's operating temperate by restricting the flow of coolant from the engine back to the radiator, making it a critical part for your vehicle. If you notice an issue with you Rover overheating, it may be time to replace your thermostat. It's important to switch out a bad thermostat at the first sign of failure, or risk suffering further, costly damage to other engine components.