Mercedes Sprinter Auxiliary Electric Water Pump – Bosch | #0392020026 / 0018351364

DESCRIPTION:

This Bosch electric auxiliary water pump keeps coolant circulating through the heater circuit independently of the main water pump — ensuring consistent heat delivery to the cabin and preventing hot spots in the cooling system. When it fails, you'll notice reduced heater performance, uneven coolant flow, or fault codes related to the auxiliary coolant circuit.

What This Part Does

This recirculation pump operates in the heater valve hose circuit, pushing coolant through the heater core to maintain steady cabin heat and supplemental coolant flow. Unlike the main belt-driven water pump, this electric unit runs on demand and is particularly active during low engine-speed operation — exactly the kind of stop-and-go duty cycle a Sprinter sees in fleet and delivery use.

When to Replace It

Replace this pump if you're experiencing weak or inconsistent cabin heat, coolant circulation fault codes, or if the pump has become noisy or seized. It's also a smart preventive replacement during any major cooling system service on high-mileage vans.

Fitment

• 2007–2009 Dodge Sprinter 2500/3500 – 3.0L Diesel
• 2010–2018 Mercedes-Benz Sprinter 2500/3500 – 3.0L Diesel (chassis serial number specific)
• 2010–2017 Freightliner Sprinter 2500/3500

Note: Fitment on some Sprinter configurations is chassis-serial-number specific. Always verify your VIN before ordering. Contact us and we'll confirm fitment before you buy.

Part Numbers

• Bosch: 0392020026 / 0-392-020-026
• Mercedes OEM Cross Reference: 0018351364 / A0018351364
• Cross Reference: 5098398AA, A0008357064