Defender Cooling System Parts
Shop Land Rover Defender cooling system parts for routine maintenance, coolant leaks and temperature-related repairs, including radiators, water pumps, thermostats, coolant hoses, expansion tanks, caps, seals, gaskets and coolant.
Start with the engine and the part being replaced, then check the product page for part number, vehicle fitment, brand, kit contents and any early or late fitment notes before ordering. Defender cooling parts can split by engine, model year, hose layout, radiator type and original part number.
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Find the right Defender cooling system part route
Defender cooling system work can involve radiators, coolant hoses, thermostats, water pumps, expansion tanks, temperature sensors, sealing washers, oil cooler parts and small gaskets. Use the route below to narrow the job, then confirm the exact part number and fitment notes on the product page.
| Job / route | Best place to start | Check before ordering |
|---|---|---|
| Radiator replacement | Defender radiators for Td5, TDCI, 300TDI and earlier engine fitments | Check engine, radiator reference, hose layout and any early or late fitment note before ordering. |
| Water pump repairs | Water pumps, water pump bolt kits, seal kits, housing O-rings and coolant pump covers | Match the pump and sealing parts to the engine. Td5, TDCI and 300TDI parts are not interchangeable by name alone. |
| Thermostat and temperature control | Thermostat assemblies, coolant elbows, temperature sensors, restrictors and related sealing washers | Check whether the part is for Td5, TDCI, 300TDI or a shared Defender / Discovery fitment. |
| Coolant hose and pipe replacement | Top hoses, heater hoses, thermostat hoses, metal coolant pipes and expansion tank hoses | Compare hose shape, pipe route and part number before ordering, especially on Td5 and TDCI vehicles. |
| Expansion tank and cap repairs | Expansion tanks, pressure caps, bottle caps, tank-to-radiator hoses and related seals | Check engine and model fitment, as some caps and tanks are shared while others are Defender-specific. |
| 300TDI coolant leaks | 300TDI water pumps, P gaskets, heater pipes, radiator parts and sealing washers | Check whether the part also fits Discovery 1 or Range Rover Classic 300TDI, and match any stated reference. |
| Td5 oil cooler and fuel cooler work | Td5 oil cooler repair kits, fuel cooler assemblies, fuel cooler O-rings and coolant-side seals | Check Defender Td5 and Discovery 2 Td5 shared fitment carefully before ordering. |
| Coolant and service fluids | Land Rover antifreeze and coolant | Check coolant specification, pack size and whether the product is concentrate or ready mixed. |
Check Defender cooling system fitment before ordering
Defender cooling parts can look similar across Td5, TDCI, 300TDI, 200TDI and earlier engines. Some parts are shared with Discovery 1, Discovery 2 or Range Rover Classic, while others need a Defender-specific or engine-specific check. The product title, part number and fitment notes should be used together before adding parts to the basket.
Engine type
Check whether the part is for Td5, TDCI, 300TDI, 200TDI or an earlier Defender engine.
Check whether the part is for Td5, TDCI, 300TDI, 200TDI or an earlier Defender engine.
Cooling layout
Radiators, hoses, thermostats and expansion tank parts can split by hose routing and early or later layout.
Radiators, hoses, thermostats and expansion tank parts can split by hose routing and early or later layout.
Original part number
Compare any stated reference with the radiator, pump, hose, sensor, cap, gasket or seal being replaced.
Compare any stated reference with the radiator, pump, hose, sensor, cap, gasket or seal being replaced.
Kit contents
Check exactly which gaskets, O-rings, bolts, seals, washers or coolant-side repair parts are supplied.
Check exactly which gaskets, O-rings, bolts, seals, washers or coolant-side repair parts are supplied.
Genuine, OEM and aftermarket Defender cooling parts
Individual product pages identify the brand or quality level where that information is available. Use the stated brand, part number, engine fitment and included parts to compare Defender cooling system components before ordering.
| Part type | How it is shown on Twinwoods 4x4 |
|---|---|
| Genuine Land Rover | Genuine parts are identified as Genuine Land Rover where that status is stated on the product page. |
| OEM or OE-supplier | OEM and OE-supplier parts are identified where the supplier or product data supports that claim. |
| Aftermarket replacement | Aftermarket parts cover selected replacement, service and repair parts where Genuine or OEM supply is not required or not stated. |
Useful Defender cooling-system routes
| Route | Use it for |
|---|---|
| Td5 Parts Hub | Broader Td5 parts, repairs and service routes for Defender Td5 and Discovery 2 Td5. |
| Defender engine parts | Engine-related parts where the cooling repair overlaps with water pump, gasket, sensor or engine work. |
| Discovery 2 cooling parts | Shared and Discovery 2-specific Td5 cooling system parts. |
| Discovery 1 cooling parts | Cooling parts for Discovery 1 models, including shared 300TDI fitments. |
| Range Rover Classic cooling parts | Cooling parts and shared 300TDI fittings for Range Rover Classic models. |
| Land Rover antifreeze and coolant | OAT coolant and antifreeze routes for Land Rover cooling system service work. |
