Bestselling Water Pump 1151 8482 250 for BMW

Core Selling Points
Popular cooling part for consolidated one-stop procurement
Original mechanical water pumps are prone to failure on B46/B48 power assemblies. Long-term high-temperature erosion inside the engine bay, coolant corrosion, belt tension load and driving vibration will cause bearing wear, shaft seal aging & coolant seepage, as well as reduced water delivery efficiency of the impeller.
A defective water pump will lead to continuous coolant loss, abnormal water temperature surge, slow engine warm-up and poor winter heating effect. In severe cases, sustained high temperature will cause cylinder head deformation and cylinder gasket damage. Most customers combine this water pump with thermostats, cooling hoses, expansion tanks and sealing gaskets for one-time bulk purchase to cut procurement and shipping costs, bringing steady profit and low inventory pressure for distributors all year round.
100% matches OEM dimensional standards, direct bolt-on replacement without modification
Produced strictly in accordance with BMW original factory technical parameters: overall pump housing outline, mounting hole layout, pulley size, impeller structure and sealing surface radian are completely consistent with genuine 11518482250; interchange OE reference: 11518650988.
No cutting, polishing or pipeline modification is needed during installation. It perfectly matches the original engine installation position of BMW G-series chassis and fits the original drive belt track, effectively shortening vehicle maintenance hours.
Applicable Engines & Vehicle Models
Matched Engine: B46 / B48 2.0L turbo gasoline engine
Applicable Chassis & Models:
3 Series G20/G21, 4 Series G22/G23, 5 Series G30/G31/G38, 6 Series GT G32, 7 Series G11/G12, X3 G01, X4 G02, X5 G05, Z4 G29
Applicable displacements: 320i, 330i, 520i, 530i, X3 xDrive20i/30i, Z4 sDrive20i etc.
Installation position: Main mechanical circulating pump for engine primary cooling circuit
Upgraded Durable Structural Design
Integrated die-cast aluminum pump body: High structural rigidity, excellent heat dissipation performance, resistant to long-term high temperature and coolant corrosion, not easy to crack or deform
Optimized metal impeller: Stable water output flow, effectively improve heat exchange efficiency of the cooling system
Dual-layer fluororubber rotary shaft seal: Good compression resilience, effectively block coolant leakage at the rotating shaft
High wear-resistant integrated pulley: Smooth transmission with drive belt, no slipping or abnormal noise under high-speed operation
Complete finished product with matched sealing gasket for direct assembly
Core Functions & Engine Protection Value
Drive forced circulation of engine coolant to take away combustion heat and stabilize engine working temperature within the safe rated range
Accelerate cold engine warm-up progress and guarantee normal hot air supply inside the cabin in low-temperature environment
Avoid major engine faults such as cylinder head warpage and cylinder gasket breakdown caused by overheating
Maintain normal operating temperature of turbocharger and extend the service life of turbo components
Common Fault Problems Solved
Coolant seepage and obvious water stains near the water pump installation position
Water temperature rises sharply during driving, triggering dashboard high-temperature alarm
Obvious abnormal buzzing noise from the front end of the engine
Slow vehicle warm-up speed and cold air blowing out of the air outlet in winter
Frequent shortage of coolant requiring regular replenishment
Factory Testing & Stable Spot Supply
Every finished water pump passes hydraulic leakage test, high-low temperature alternating aging test, running vibration test and flow calibration inspection before delivery, complying with IATF 16949 automotive industry quality certification standard.
Adequate spot goods support mixed purchase with thermostats, water pipes, expansion tanks and complete B48 cooling maintenance kits. Neutral packaging and private label OEM customization services are available for global wholesale clients.