AS3-D2L Upgrade

Still running a Gen 1 Espar D2? It's time for a serious upgrade. The Espar/Eberspächer S3-D2L brings next-generation heating technology to your existing install — with a drop-in swap that takes minutes, not hours.

Why Upgrade?

• Brushless blower motor — engineered for a 5,000-hour service life
• Acoustically enhanced Fuel Metering Pump — no more tick, tick, tick
• Noticeably quieter operation — heat you feel, not hear
• 2-year / 2,000-hour warranty — backed by Eberspächer and EsparParts.com
• Reduced maintenance intervals — spend less time servicing, more time on the road

Effortless Installation

Remove your old heater and Fuel Metering Pump, drop in the new S3-D2L and its FMP, and plug in the included adapter harnesses. Your existing controller works as-is — no rewiring required.

What's Included

• S3-D2L Heater
• Fuel Metering Pump
• 60mm Straight Outlet Hood
• S1 to S3 Main Harness Adapter
• S1 to S3 Fuel Metering Pump Harness Adapter

Note: To access heater diagnostics with your existing controller, diagnostic tool P/N 20.2900.70.0033 is required.