Eberspacher Airtronic M3 D4L Heater Unit and Fuel Pump Only 24v | 252956050000

The Eberspacher Airtronic D4/D4S to M3 D4L Upgrade Changeover Kit is a 24V plug-and-play solution to modernise older Espar D4 heaters. It preserves your existing Airtronic ducting, fuel lines and controller, while delivering the latest M3 D4L performance with minimal downtime. Includes a genuine 24V Airtronic D4L heater and fuel pump, a plug‑and‑play upgrade harness, fuel pump adapter, and a comprehensive installation CD. The kit also features a diagnostic port for EasyScan testing and is suitable for marine, welfare, ambulance and commercial fleets, as well as caravans and motorhomes. Compatible with multiple D-series units and EasyStart control options, it offers a straightforward path to improved reliability and reduced maintenance time. Customised kits are available on request through Butler Technik.