High Output Heater Matrix Curved Pipe Type for Defender RHD 1986–1990 | DA4743

If your early Defender heater struggles to keep the cabin warm or clear the windscreen effectively, this AlliSport high output heater matrix is a proven upgrade designed to significantly improve heating performance.

This uprated heater matrix (DA4743) is a direct replacement for the standard AAP817 unit used in Defender models from 1986 to 1990. Featuring a larger core with approximately double the capacity of a standard matrix, it delivers increased heat output and faster demisting.

Manufactured using high-quality vacuum brazed cores with louvered fins and hand TIG welded construction, this unit is built for durability and improved efficiency.

KEY FEATURES

• High output heater matrix upgrade
• Direct replacement for AAP817
• Approximately twice the capacity of standard matrix
• Improved cabin heating and faster windscreen demisting
• High-quality vacuum brazed core with louvered fins
• Hand TIG welded construction

IMPORTANT FITMENT INFORMATION

• Designed for early heater systems with curved / downward facing inlet and outlet pipes
• Suitable for right-hand drive (RHD) vehicles
• Not suitable for later models with straight pipe heater matrix
• Not suitable for Puma 2.4 and 2.2 TDCi models (2007 onwards)
• Minor modification to the heater box is required for installation

PART DETAILS

• Part number: DA4743
• Type: High output heater matrix
• Pipe orientation: Curved / downward facing
• Replaces: AAP817

SUITABLE FOR THE FOLLOWING LAND ROVER MODELS

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

NOTES

• This is an upgraded replacement, not a standard matrix
• Always check pipe orientation before ordering
• Installation requires modification to heater box

If you want a noticeable improvement in heater performance on an early Defender, this high output matrix provides significantly better heat output and faster demisting in colder conditions.