Bosch Electric Water Pump With Connector
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A 12 volt electric coolant pump from Bosch, supplied with the mating connector, pins and seals. It moves coolant round a loop that no longer has an engine to drive a pump.
Take the engine out of a car and the water pump goes with it. Everything left that needs coolant moving, the battery loop, a cabin heater, a charger or an inverter, now needs a pump of its own, running on 12 volts and controlled by you rather than by engine speed.
The 0.1 bar figure is the one to read. This is a circulation pump, not a pressure pump. It keeps coolant moving round a loop that is already filled and bled. It will not prime a dry system, lift coolant any useful height, or force its way through a badly restricted circuit. Plumb it into a low point of a filled loop and it will run happily for years. Ask it to do a pressure pump's job and it will not.
It is sealed for the place it usually ends up. IP6K7 and IP69K together mean it is dust tight, survives immersion, and takes a close range high pressure steam wash. That matters because a pump like this normally gets mounted low in the engine bay where it sees road spray and jet washing.
Key specifications
| Manufacturer | Bosch |
|---|---|
| Manufacturer part | 0 392 023 004 |
| Type | Electric coolant circulation pump |
| Rated voltage | 12 V DC |
| Flow rate | 900 litres per hour, which is 15 litres per minute |
| Operating pressure | 0.1 bar |
| Ingress protection | IP6K7 and IP69K |
| Mounting | No holder or bracket supplied |
| Weight | 0.31 kg |
Features
- Genuine Bosch automotive pump, not a marine or industrial part pressed into vehicle service
- Supplied with the connector, pins and seals, which is the part people most often have to chase separately
- 900 litres per hour is enough for a single battery or heater loop in a conversion
- Sealed to IP69K, so it can be mounted low and steam cleaned
- Runs on 12 V, so it can be switched by a relay from a BMS, a thermostat or the ignition
Compatibility
Suits any 12 volt coolant loop: battery pack cooling, a cabin heater circuit, charger or inverter cooling, and general auxiliary circulation.
Two things to plan for before you order. There is no mounting holder in the box, so you will need a clamp or bracket. And Bosch do not publish a current draw or a port size for this pump, so if either matters to your fuse sizing or your hose choice, the CAD model in the Documents tab gives you the port geometry to measure against, and we would size the supply generously until you have measured the real draw.
Mount it at a low point in the circuit, below the header tank, so it stays flooded. A circulation pump that is allowed to run dry will not last.
In the box
- 1 x Bosch electric water pump
- 1 x mating connector housing
- Pins and seals to suit
Downloads
A 3D CAD model in STEP format is in the Documents tab, for checking clearances and port positions before you commit to a mounting position.
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