2780701201 BEMWQ High Pressure Pump for Mercedes Benz W166 X166 C292 M157

2780701201 BEMWQ High Pressure Pump for Mercedes Benz W166 X166 C292 M157

The BEMWQ High Pressure Pump (Part No.: 2780701201) is a critical fuel delivery component designed for Mercedes-Benz vehicles equipped with the M157 5.5L V8 Biturbo engine. It is fully compatible with chassis models including the W166 (ML/GLE-Class), X166 (GL/GLS-Class), and C292 (GLC Coupe). This direct-injection high-pressure fuel pump (HPFP) is typically camshaft-driven and responsible for drawing low-pressure fuel from the tank and amplifying it to extremely high pressures (often exceeding 200 bar / 2,900 psi) required by the direct injectors for precise fuel atomization, efficient combustion, and optimal engine performance .

• Precision OEM Specification:​ Manufactured to match the original equipment standard 2780701201, ensuring exact mounting flange alignment, correct electrical connector pinout, and seamless integration with the M157 engine’s fuel delivery system without modification .

• High-Pressure Output & Stability:​ Engineered with precision-machined internals (such as hardened plungers and cylinders) and advanced sealing technology to deliver consistent, stable high-pressure fuel output across all RPM ranges and load conditions .

• Durable & Heat-Resistant Build:​ Constructed with a premium-grade aluminium alloy housing and reinforced internal stainless steel components designed to withstand the extreme pressures, engine bay heat, and vibrations inherent to high-performance Biturbo V8 operation .

• Direct Fitment:​ Designed as a complete assembly, ready for straightforward bolt-on installation using existing mounting points, fuel line connections, and electrical plugs for immediate operation .

• Restored Engine Power & Throttle Response:​ Eliminates common issues caused by a failing high-pressure pump—such as long cranking/hard starting, significant power loss under load, hesitation during acceleration, and high-RPM stumbling—by restoring proper rail pressure and fuel volume .

• Smoother Idle & Fuel Efficiency:​ Corrects rough or unstable idling and erratic air-fuel mixtures often triggered by internal pump wear or pressure drop, helping to optimize fuel atomization and combustion efficiency .

• Check Engine Light & Fault Code Resolution:​ Directly addresses common HPFP-related diagnostic trouble codes (e.g., low fuel pressure codes, P0087, P0088) and sensor circuit faults, turning off the dashboard warning light and preventing the vehicle from entering reduced-power "Limp Mode" .

• Cost-Effective Performance Repair:​ Provides a dependable and high-quality economical alternative to OEM parts for resolving fuel delivery issues, which is a known wear item on higher-mileage M157 engines (often recommended to inspect around 100,000 km / 60,000 miles), securing the long-term reliability and driving dynamics of the AMG powertrain .