06M127025F
HITACHI 06M127025F High Pressure Fuel Pump Audi S4 S5 SQ5 B9 A8 D5 Porsche Macan S 3.0T EA839 HPP0047
06M127025B, HPP0047, GDP225--250 barVehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Porsche Macan GTS / Turbo 2.9T | Audi / Porsche EA839 (2.9L BiTurbo & 3.0L V6 Turbo TFSI CWGD / DECA) | 2019-2023 |
| Audi S4 / S5 3.0T B9 | Audi / Porsche EA839 (2.9L BiTurbo & 3.0L V6 Turbo TFSI CWGD / DECA) | 2017-2023 |
| Audi RS4 / RS5 2.9T B9 | Audi / Porsche EA839 (2.9L BiTurbo & 3.0L V6 Turbo TFSI CWGD / DECA) | 2018-2023 |
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 06M127025F |
| Manufacturer Brand | HITACHI |
| Component Type | Mechanical High Pressure Fuel Pump (HPFP) |
| Engine Application | Audi / Porsche 3.0L Turbocharged DOHC 24V V6 TFSI EA839 (CWGD / CZSE / DLZA) |
| Operating PressureCore Spec | |
| Mounting Torque (Flange / Bracket) | 20 N-m (177 lb-in) |
| Fuel Line / Rail Torque | 27 N-m (20 lb-ft) |
| Primary Diagnostic Fault Codes | P0087, P0088, P2293, P053F |
Matched High-Pressure Fuel Pump (Fuel Circuit Assembly)
Operates on the same high-pressure rail circuit. When troubleshooting low rail pressure (DTC P0087), verify pump volumetric delivery before replacing injectors.
Installation Tips
- Depressurize Fuel System: Pull fuel pump fuse or disconnect LPFP harness. Crank engine 5-8 seconds until it stalls to drop residual rail pressure below 5 bar.
- Clean Surrounding Cavity: Blow compressed air around cylinder head bore or pump flange cavity to prevent dirt ingress into the fuel rail.
- Lubricate & Fit Seals: Inspect Teflon combustion seals or O-rings. Coat lightly with clean motor oil (do not use grease) to avoid tearing during insertion.
- Torque to Factory Specification: Hand-thread bolts evenly. Tighten mounting fasteners to 20 N-m (177 lb-in), and torque fuel line fittings to 27 N-m (20 lb-ft).
- Prime & Leak Check: Cycle ignition to RUN position 3 times (5 seconds each) to build low-side pressure. Inspect fittings for leaks before starting engine.
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.