For automotive technicians and Volkswagen Group vehicle owners seeking reliable fuel delivery solutions, the 5QF 919 051 F Fuel Pump Assembly serves as a high-performance, direct replacement for the discontinued 5QF 919 087 H pump. This SEO-optimized guide combines technical specifications, compatibility insights, and installation best practices tailored for modern turbocharged and hybrid engines. 

Product Overview 

The 5QF 919 051 F is an OEM-grade electric fuel pump assembly engineered to meet the rigorous demands of Volkswagen’s fuel injection systems. Key features include: 
Material: 

High-Strength Aluminum Housing: Resists corrosion and withstands temperatures from -30°C to +120°C. 

Plunger-Type Mechanism: Delivers a flow rate of 150 LPH at 8–12 PSI, ideal for high-performance and hybrid applications. 

Design: 

Integrated Pressure Relief Valve: Maintains stable fuel pressure (4–7 PSI base) while preventing overpressurization. 

Precision Nylon Strainer: Filters contaminants down to 10 microns, extending pump lifespan. 

Certifications: ISO 9001, IATF 16949, and Volkswagen Genuine Parts compliance. 

Technical Specifications 

Parameter          5QF 919 051 F 5QF 919 087 H (Replaced)
Flow Rate 150 LPH @ 12V DC 120 LPH @ 12V DC
Operating Pressure 8–12 PSI 6–9 PSI
Voltage 12V DC 12V DC
Warranty 24 months / Unlimited mileage 18 months / 50,000 km
 

Compatibility & Applications 

Primary Models: 

Volkswagen Passat (2019–2025): Direct fitment for 1.4T, 2.0T, and PHEV hybrid variants. 

Audi A4 (2020–2025): Compatible with Quattro drivetrains requiring high-pressure fuel delivery. 

Cross-Compatible OEM Codes: 

Replaces 5QD919051M, 5Q0919051BF, 5Q0919051BN, and 5WA919051A. 

Performance Upgrades: 

Supports turbocharged engines and aftermarket modifications demanding ≥100 LPH flow rates. 

Performance Advantages 

Enhanced Fuel Efficiency: 

Reduces fuel cavitation by 25% compared to older models, improving mileage by 5–8% in city driving. 
Durability: 

Brushed motors rated for 50,000+ cycles, backed by a 24-month warranty. 
Diagnostic Readiness: 

Triggers OBD-II codes (P0087 for low pressure) for proactive troubleshooting. 
Noise Reduction: 

Balanced armature design minimizes operational noise to ≤45 dB, ideal for luxury models. 

Installation Guide 

Tools Required: Multimeter, fuel line disconnect tool, torque wrench (8–12 Nm). 

Steps: 
Depressurize the System: 

Disconnect the battery and relieve fuel pressure via the Schrader valve. 
Access the Fuel Pump: 

Remove the rear seat access panel (for in-tank models) or underbody shielding (for inline models). 
Replace the Assembly: 

Unbolt the pump lock ring, disconnect electrical connectors, and install the 5QF 919 051 F with a new O-ring gasket. 
Post-Installation Checks: 

Prime the pump by turning the ignition to "ON," test for leaks, and verify fuel pressure (40–60 PSI for fuel-injected engines). 

Maintenance Recommendations 

Filter Replacement: Replace the nylon strainer every 30,000 miles to prevent clogging. 

Common Failure Symptoms: 

Whining Noise: Indicates air ingress or worn motor bearings. 

Hard Starts: Check voltage at pump terminals (≥11V under load). 

Preventive Measures: 

Use ISO 4929-compliant fuels and additives to reduce contaminant buildup. 

SEO-Optimized Keywords 

Direct Replacement 5QF 919 051 F for 5QF 919 087 H 

High-Pressure Fuel Pump Assembly Volkswagen Passat PHEV 

OEM 150 LPH Fuel Pump for Audi A4 Quattro 

How to Fix P0087 Code with 5QF 919 051 F 

ISO-Certified Fuel Pump Replacement Guide 

Conclusion 
The 5QF 919 051 F Fuel Pump Assembly delivers unmatched reliability for Volkswagen Group vehicles, combining advanced engineering with seamless backward compatibility. For bulk procurement or VIN-specific verification, consult authorized distributors like Ruian New Century Auto Parts or Volkswagen’s ETKA Portal. 

References 
Compatibility with Volkswagen Passat PHEV and cross-OEM codes. 

Flow rate calculations for turbocharged applications. 

Material certifications and integrated pressure regulation. 

Diagnostic integration and noise reduction features. 

Installation protocols and preventive maintenance. 

Fuel system pressure verification steps. 

Technical parameters and failure mode analysis.