High Pressure Fuel Pump HPFP 2000+ psi OEM Part Number 03H127025E Camshaft-driven for Audi Q7 Passat 3.6L VR6

The High Pressure Fuel Pump (HPFP) with OEM number 03H127025E is a verified direct-fit replacement for Volkswagen Group 3.6L VR6 FSI engines (EA837 series) found in Audi Q7 (2006‑2010), VW Passat (2006‑2010), and Passat CC (2008‑2012) models.

This critical component of modern Gasoline Direct Injection (GDI) systems boosts fuel pressure to extremely high levels—often over 2,000 psi—enabling direct fuel injection into the combustion chamber for improved efficiency and power output.

Why this part fails: The HPFP is driven by a dedicated lobe on the exhaust camshaft. The cam follower (tappet) is the interface between the cam lobe and the HPFP plunger. This follower experiences extreme cyclic loading and is a known wear item.

The #1 cause of HPFP failure is a worn-through cam follower, which then destroys the pump shaft (plunger) and, in severe cases, damages the camshaft lobe itself.

• Rough cold starts — classic HPFP delivery issue
• Prolonged cranking — engine struggles to start
• Check Engine Light — codes P0087, P0088, P0191, P0193
• Reduced engine power, rough idle, jerking on acceleration
• Loss of power under load — highway passing or uphill acceleration feels flat
• Increased fuel consumption — ECU compensates for poor atomization

• P0087 / P0088 fuel pressure DTCs present
• Audible ticking or rattling from pump area (worn follower)
• Engine oil contaminated with fuel (internal pump seal failure)
• High mileage (>160,000 km / 100,000 miles) with unknown pump history

Tools required: Torque wrench, E-torx socket set, fuel line disconnect tool, new cam follower, new mounting nuts/bolts, clean shop rags and safety glasses.

Critical steps:

• Depressurize the fuel system before disconnecting any lines
• Always replace the cam follower when replacing HPFP
• Inspect camshaft lobe for damage if cam follower is severely worn
• Torque mounting nuts to 10 Nm in cross pattern
• Check for fuel leaks at all connections before starting

• Replace cam follower every 60,000-80,000 km as a wear item
• When replacing HPFP, ALWAYS replace the cam follower
• Use only OEM or OE-spec cam follower
• Replace low‑pressure fuel filter every 60,000 km

• Individually sealed in protective packaging with anti-corrosion coating
• Packed in foam-lined carton (branded or plain)
• O-ring / gasket included
• Note: Cam follower not included — must be purchased separately
• Bulk wholesale: 20 pumps per master carton with dividers
• Suitable for: Audi/VW specialist repair shops, independent garages, auto parts distributors

Shipping dimensions: Approx. 15*12*10 cm, weight approx. 1.0-1.2 kg