LANDNOVO AJ89485 Aluminum Thermostat Housing Assembly for Jaguar S-Type, XJ8, XJR & Vanden Plas 4.2L V8 | Premium OE Replacement

LANDNOVO — Precision in Motion. Engineered by GB.

Brand New – 100% Original Equipment Performance. Upgraded Aluminum Construction.

Is your Jaguar S-Type, XJ8, XJR, or Vanden Plas experiencing coolant leaks, overheating, or visible cracks in the thermostat housing? The original plastic thermostat housing is prone to cracking and failure over time. The LANDNOVO AJ89485 Aluminum Thermostat Housing Assembly is a premium, upgraded replacement engineered to permanently solve this common failure point.

Manufactured from high-grade aluminum alloy, this thermostat housing is designed to withstand extreme temperature fluctuations without cracking, warping, or leaking. It is a direct drop-in replacement for the original plastic unit (OE AJ89485 / AJ87947) and includes the thermostat and gasket for a complete repair.

Why Upgrade to Aluminum?

The factory-installed plastic thermostat housing on these Jaguar models is a well-known weak point. Over time, exposure to high engine temperatures and coolant causes the plastic to become brittle and crack, leading to coolant leaks and potential engine overheating. The LANDNOVO aluminum upgrade eliminates this failure mode entirely, providing a permanent solution that outlasts the original part.

Key Features

• Upgraded Aluminum Construction – replaces the failure-prone plastic original; resists cracking, warping, and heat degradation
• Brand New – high-quality materials, rigorously tested
• 100% OE Performance – direct replacement for OE AJ89485 / AJ87947
• Complete Assembly – includes thermostat housing, thermostat, and gasket
• Leak-Free Design – precision-machined sealing surfaces ensure a secure, long-lasting seal
• Plug & Play – bolt-on installation, no modification required
• British-Engineered Precision – Designed by GB
• 12-Month Warranty – peace of mind

Fitment

Vehicle	Chassis	Years	Engine
Jaguar S-Type	X200	2003–2008	4.2L V8 (without supercharger)
Jaguar XJ8	X350	2003–2005	4.2L V8
Jaguar XJR	X350	2003–2005	4.2L V8
Jaguar Vanden Plas	X350	2003–2005	4.2L V8
Jaguar Super V8	X350	2003–2005	4.2L V8

Note: For 4.2L V8 engines without supercharger. Also fits some 3.5L V8 models up to VIN G49700. Confirm compatibility with your VIN before purchase.

OE Cross-Reference

OE Number	Type
AJ89485	Primary
AJ87947	Supersession
AJ87364	Cross-reference
AJ85886	Cross-reference
AJ85824	Cross-reference
AJ85730	Cross-reference

Specifications

• Type: Engine Coolant Thermostat Housing Assembly
• Material: Aluminum Alloy (upgraded from original plastic)
• Includes: Thermostat housing, thermostat, gasket
• 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
• Visible cracks – cracks in the plastic housing, often near the hose connections
• Low coolant warning light – the dashboard displays a low coolant warning
• Sweet smell of coolant – coolant burning on hot engine parts

Installation Tips

• Professional installation recommended.
• Drain coolant before removal.
• Clean the mating surface thoroughly before installing the new housing.
• Use the included gasket to ensure a proper seal.
• After installation, refill with correct Jaguar-approved coolant and perform system bleed procedure.

LANDNOVO — Precision | Guaranteed | Durability