BMW 1 Series E87 125i 130i 05-11 4 PIN Electric Water Pump

BMW 1 Series Electric Water Pump — E81 / E82 / E87 / E88 N52 Cooling System Replacement

This 12V electric water pump is designed for selected BMW 1 Series petrol models including E81, E82, E87 and E88 125i / 130i applications using the N52 and N52B30 engine family. It is commonly matched to BMW OE reference 11517586925 and related superseded numbers.

BMW’s N52 straight-six petrol engines use an electric coolant pump instead of a traditional belt-driven mechanical pump. The pump is controlled by the engine management system and helps regulate coolant flow according to temperature, engine load and driving conditions. When this pump fails, the engine can overheat quickly, especially in traffic or hot South African conditions.

Always confirm fitment by VIN, engine code, OE number and connector type before ordering. BMW used different cooling-system layouts across model years, body codes and markets.

Why this BMW 1 Series water pump matters

• Restores correct coolant circulation through the N52 cooling system
• Helps protect the cylinder head, head gasket, radiator and heater circuit
• Supports stable engine temperature in traffic, town driving and long-distance use
• Replaces common BMW OE references including 11517586925 and related superseded numbers
• Designed for selected BMW 1 Series E8x petrol models using a 4-pin electric water pump

BMW electric water pump overview

Common symptoms of a failing BMW 1 Series electric water pump

• Engine temperature warning on the dashboard
• Sudden overheating after a short drive
• Electric radiator fan running loudly or constantly
• Coolant circulation faults or temperature-related fault codes
• Heater performance becoming weak or unstable
• Limp mode or reduced power when the engine overheats
• Coolant leaks around the pump, thermostat or hose connection area

Why many BMW owners replace the thermostat at the same time

On BMW N52 cooling-system repairs, the water pump and thermostat are often inspected together because both parts control engine temperature. If the water pump is replaced but the thermostat is weak, sticking or not responding correctly, the vehicle may still overheat or run with unstable temperature behaviour.

Replacing the correct thermostat together with the water pump can reduce repeat labour and gives the cooling system a better chance of returning to stable operating temperature after repair.

BMW 1 Series E8x N52 fitment guide

The table below focuses on BMW 1 Series E8x applications linked to the N52 petrol engine family. Use this as a fitment guide only. Final confirmation must be done by VIN, OE number, engine code and connector type.

Related BMW applications for the 11517586925 pump family

The 11517586925 electric water pump family is also associated with selected BMW 3 Series, 5 Series, X3, X5 and Z4 applications using related N52 / N53 petrol engine families. For broader fitment research, use the BMW water pump hub page below.

OE numbers and cross references

This pump is commonly matched using the following BMW OE references. Compare your old pump number where possible and confirm with VIN before ordering.

Before you order, confirm these details

Installation and bleeding best practice

• Drain and refill with the correct BMW-approved coolant mixture
• Use deionised or distilled water when mixing coolant
• Inspect the thermostat, hoses and expansion tank before reassembly
• Check the water pump electrical connector and wiring harness
• Do not reuse damaged seals, O-rings or incorrect fasteners
• Follow the correct BMW electric cooling-system bleeding procedure
• Clear fault codes and road test while monitoring temperature behaviour

Incorrect bleeding can cause trapped air, repeat overheating and false diagnosis of new-part failure.

What’s included

• BMW 4-pin electric water pump matched to the listed application
• Fitted vibration dampers where applicable
• Seals, bolts or accessories only where supplied by the manufacturer

Images are for illustration. Confirm by VIN, OE number, engine code and connector type before ordering.

FAQs

Warranty and important notes

• 12-month warranty against manufacturing defects
• Warranty does not cover incorrect fitment, poor installation, contaminated coolant or failure to bleed the system correctly
• Using incorrect coolant or plain tap water may cause corrosion and repeat cooling-system failure
• Professional installation is recommended for BMW electric cooling-system repairs