JEF100220 | Heater Matrix - Left-hand Drive Horizontal Pipes | Defender 1999-2002
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To check the stock of Genuine Parts before placing an order please use our Contact Us page
Land Rover Part Number: JEF100220 - Heater Matrix - Left-hand Drive - Horizontal Pipes
JEF100220 is a heater matrix specified for left-hand drive Defender models with horizontal inlet and outlet pipes. Fitted within the dashboard heating assembly, the matrix passes warm engine coolant through a finned core while cabin air is drawn across the tubes to provide heating. The left-hand drive orientation and horizontal pipe layout determine hose routing and heater box connections, so correct orientation and secure hose connections are required for a leak-free installation. Replacement typically requires draining part of the cooling circuit and careful reconnection of the horizontal inlet and outlet hoses to avoid air locks; ensure proper seating and clamp torque when refitting.
Use the compatibility data below to confirm fitment against your V.I.N.
Compatibility
- Defender (1999-2002) - From VIN XA159807 to VIN 2A633474
Frequently Asked Questions
The JEF100220 heater matrix is a compact heat exchanger that transfers thermal energy from engine coolant into the vehicle cabin by passing coolant through a finned core while air flows over the tubes. Its horizontal inlet and outlet pipes and left-hand drive orientation determine the hose routing and heater box connections. Removal and replacement normally require partial draining of the cooling circuit and careful hose reconnection to avoid air locks and leaks.
| Model | Variant |
|---|---|
| Land Rover Defender | 1987-2006 (L315) - Heater Matrix |
| Land Rover Defender | 1999-2002 - From VIN XA159807 to VIN 2A633474 |
If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.
Inspect the heater matrix during cooling system services and replace it if there are signs of external coolant leaks, corrosion, blockages, or a persistent loss of cabin heating performance. If unsure, consult the vehicle handbook or a qualified technician for guidance.
- C8 products are usually supplied by Britpart.
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