High-selling water pump assembly 11517632 426 for BMW N54 B30 A/N55 B30 A

Core Selling Points

Hot-selling high-failure cooling core part with stable repeat bulk orders

Electronic water pumps are the most common vulnerable parts of N54/N55 turbo engines. Original pumps suffer brushless motor burnout, internal bearing wear, mechanical seal aging, circuit board failure and impeller jamming after long-term high-temperature cycle operation (service life only 60,000–100,000 miles). Damaged pumps trigger sharp temperature spikes, engine overheating alarm, limp mode protection, cold start slow warm-up, insufficient turbo heat dissipation and ECU cooling fault codes. Professional BMW service garages and global spare parts distributors place recurring bulk orders all year round, bringing stable sales volume and high profit margins for dealers.

100% OE exact direct replacement, plug-and-play without coding modification

Manufactured strictly following BMW original mold standards: aluminum housing outline, threaded pipe interface, mounting hole pitch circle, 4-pin electrical plug pin definition and internal flow channel all fully consistent with genuine OEM 11517632426, cross-reference interchangeable with 11519455978, 11517588885. No pipeline cutting, wiring refitting or extra vehicle programming required after installation, perfectly match N54/N55 engine cooling pipeline layout, greatly reduce overhaul disassembly and coolant bleeding labor hours.

Compatible BMW N54 / N55 3.0T Full Vehicle Range

• E82/E88 1 Series: 135i, 1M Coupe
• E90/E92/E93 3 Series: 335i, 335is
• E60/E61 5 Series: 535i
• E70 X5, E71 X6, Z4 E89 sDrive35i All models equipped with N54B30A twin-turbo and N55B30A single-turbo engines

Reinforced heavy-duty high-temperature resistant optimized structure

1. Die-cast aluminum pump main housing, strong thermal conductivity, anti-deformation under long engine compartment high heat
2. Upgraded wear-resistant closed PPS plastic impeller, large flow rate up to 15000L/H, effectively avoid coolant circulation blockage
3. Imported double-layer high-temperature fluorine rubber mechanical seal, permanent anti-coolant leakage, resistant to all types of ethylene glycol antifreeze
4. Full sealed brushless DC motor + built-in intelligent control board, DME ECU real-time variable speed adjustment, stable signal output without fault codes
5. Integrated threaded quick water pipe joints, tight sealing without air leakage; complete mounting positioning holes, one-time installation without gaskets

Intelligent variable-speed cooling to fully protect turbo engine

Different from traditional belt-driven fixed-flow pumps, this electronic pump adjusts operating speed in real time according to engine load, water temperature and turbo heat soak demand. Accelerate cold engine warm-up to lower fuel consumption; strengthen large-flow heat dissipation under high-speed full-load driving to prevent turbo overheating; continue residual heat circulation after flameout to avoid heat soak damage to turbine assembly, effectively extend engine service life.

Fully resolve typical water pump failure faults

Perfectly fixes common N54/N55 cooling system malfunctions:

• Sudden engine temperature surge and overheating warning light
• Vehicle enters limp mode with obvious power drop
• No hot air or slow heating inside cabin in winter
• Abnormal buzzing noise from engine compartment after ignition
• ECU stores 2E8A electric cooling pump malfunction fault code
• Coolant seepage and dripping at pump joint position

Rigorous multi-stage factory testing & sufficient spot stock

Every water pump undergoes full dynamic flow test, water tightness leakage test, high-low temperature cycle aging test, motor durability test and ECU signal matching inspection before delivery, compliant with TS16949 international automotive quality standards. Mass ready stock supports mixed one-stop bulk procurement with thermostats, auxiliary water pumps, cooling hoses and engine overhaul kits. Custom neutral packaging and private label OEM services are available for cross-border wholesale customers.