Eberspacher Airtronic Heater Upgrade Conversion Wiring Kit D2 to S2 D2L and D4S to M2 D4R

This Eberspacher heater conversion wiring harness connects an existing Airtronic installation to a new heater. Its plug-to-plug design connects the installed heater harness to the replacement and uses the existing wiring harness and controller, with no wiring required.

It supports upgrades from Airtronic D2, D4, D4S Plus and D5 heaters to newer S2, M2, S3, M3 and L3 models. Compatible heaters include D2, D4 and D5 models using 801 or 802 modulators. An EasyStart Select diagnostic port supports EasyScan testing and repair of Ax2 and Ax3 models. A fuel pump adapter lead is included for changing from an old 4519 pump to a digital fuel dosing pump.

Older heater models listed for upgrades include D2 (252069050000, 252070050000, 252675040000, 252115050000), D4 (252113050000, 252114050000), D4S Plus (252484050000, 252498050000) and D5 (252361050000, 252362050000). Newer models listed include S2 D2L, M2 D4L and D4R, S3 D2L, M3 D4L and D4R, and L3 D6L.