Heater Matrix Curved Pipe Type for Defender RHD 1986–1990 | AAP817

If your Defender heater is no longer producing heat, leaking coolant, or causing misting inside the cabin, a failed heater matrix is often the cause.

This heater matrix (AAP817) is the early type with downward curved inlet and outlet pipes, designed for Defender models from 1986 to 1990. It is a direct replacement for the original unit fitted to right-hand drive vehicles without air conditioning.

KEY FEATURES

• Early type heater matrix with curved pipe connections
• Direct replacement for original factory unit
• Restores proper cabin heating performance
• Designed for durability and reliable operation

IMPORTANT FITMENT INFORMATION

• Fits early models with downward curved heater pipe connections
• Later models use straight pipe heater matrix (not compatible)
• Suitable for right-hand drive (RHD) vehicles only
• Not suitable for vehicles fitted with air conditioning

COMMON SYMPTOMS OF FAILURE

• No heat or poor heater performance
• Coolant smell inside the vehicle
• Heater leaks or damp carpets
• Windscreen misting caused by coolant vapour

PART DETAILS

• Part number: AAP817
• Type: Heater matrix
• Pipe type: Curved / downward facing connections

SUITABLE FOR THE FOLLOWING LAND ROVER MODELS

• Defender, 1986–1990, RHD, without air conditioning

NOTES

• This is a replacement part, not an upgrade
• Always check pipe orientation before ordering
• Installation requires access to heater box assembly

A correct replacement heater matrix for early Defender models, restoring heating performance and cabin comfort.