2021 Plate MAN For sale is an Eberspächer Hydronic S3 D4A diesel coolant heater, 24V, 4kW, OEM unit for MAN vehicles. This heater is fully functioning and in good working condition. It was removed from a vehicle where it was operating correctly. Ideal for trucks, buses, boats, off-grid systems, or any application requiring reliable auxiliary heating of engine coolant. ⸻ 🔧 Technical Specifications • Model: Hydronic S3 • Version: D4A • Voltage: 24V • Heat Output: 4 kW • Fuel Type: Diesel • Max Operating Pressure: 2.5 bar • OEM Manufacturer: MAN • MAN Part Number: 81.61901-6201 • Approval Codes: E1 10R-057330 / 122R-000449
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