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Pierburg 7.02478.40.0 Engine Water Pump

Brand	Pierburg 7.02478.40.0
Diameter 1 [mm]	40
Diameter 2 [mm]	40
Operating Mode	Electric
Voltage [V]	12
Fits	BMW · 3 vehicles

Electric operation. 12V water pump for efficient coolant circulation.

Compact 40 mm design. Dual 40 mm diameters support a precise fit and flow.

Engine water pump for dependable cooling system performance.

Cross-references AP Exhaust 20057, LIQUI MOLY 2011 and Raybestos Brakes 980825 for the same application. See all 12.

$455.77Free shipping

In stock · usually ships same day before 1pm CST

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Pierburg Electric Engine Water Pump

The Pierburg 7.02478.40.0 is an electric engine water pump built for 12-volt cooling system operation. With 40 mm diameter specifications on both sides, it is a direct-fit style cooling component for select BMW applications, including the 2011 BMW 528i and 2011-2012 BMW X3.

Use this Pierburg water pump when you need a replacement that matches the vehicle’s electric cooling system requirements and OE-style dimensions. The 7.02478.40.0 part number is also a useful reference when verifying the correct BMW water pump for your application.

Key Features

Engine water pump for the cooling system
Electric operating mode for 12V vehicle systems
40 mm diameter 1 and 40 mm diameter 2
Fits 2011 BMW 528i
Fits 2011-2012 BMW X3
Pierburg part number 7.02478.40.0 for application matching

Detailed Description

Pierburg 7.02478.40.0 is an electric engine water pump designed for BMW cooling system service where precise coolant circulation is required. This unit is specified with 40 mm diameter dimensions and 12-volt electrical operation, making it a relevant replacement for vehicles equipped with an electric pump configuration. For buyers searching for a BMW X3 water pump or a 2011 BMW 528i electric water pump, this part number helps narrow the correct match quickly.

This part cross-references AP Exhaust 20057 and LIQUI MOLY 2011 for the same application.

What It Helps Address

Coolant circulation problems caused by a failing electric water pump
Engine overheating linked to reduced coolant flow
Temperature fluctuations from worn pump components
Cooling system performance loss in BMW 528i and BMW X3 applications
Diagnostic trouble related to pump operation in 12V systems

Installation Notes and Tips

Verify the vehicle’s original pump specifications before installation, including electrical operating mode and diameter measurements. Confirm fitment by matching Pierburg 7.02478.40.0 to the vehicle application listed for 2011 BMW 528i and 2011-2012 BMW X3. After installation, refill and bleed the cooling system according to BMW service procedures to remove trapped air and restore proper coolant flow.

Quality Assurance

Pierburg is an established OE-focused brand in engine management and cooling components. This water pump is built to meet the dimensional and electrical requirements listed for the application, supporting accurate replacement selection for BMW cooling system service.

This part fits 3 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2012	BMW	X3	3.0L	L6	N/A	—
2011	BMW	528i	3.0L	L6	N/A	—
2011	BMW	X3	3.0L	L6	N/A	—
No rows match your filter.

Directly replaces or cross-references 12 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

AP Exhaust — 20057LIQUI MOLY — 2011Raybestos Brakes — 98082520 94 716047160758383686350921151758383611518635092AQ-2485P417V20-16-0003