06E127025G
HITACHI 06E127025G High Pressure Fuel Pump Audi S4 S5 A6 A7 A8 Q7 SQ5 3.0T Supercharged EA837 HPP0007
06E-127-025-G, 06E127025N, 06E127025AB, 06E127025J, HPP0007Integrated Fuel Metering Solenoid Valve N290-200 barProduct Overview
The Hitachi 06E127025G (aftermarket reference HPP0007, superseding part numbers 06E127025N, 06E127025AB, and 06E127025J) is the authentic original equipment high-pressure mechanical fuel pump engineered for Audi's celebrated 3.0-liter supercharged V6 TFSI engine family (EA837). Generating up to 200 bar (2,900 psi) of regulated direct injection fuel pressure, this cam-driven single-plunger pump powers high-performance executive vehicles including the Audi S4 (B8/B8.5 2010-2016), S5 (2010-2017), A6 C7 (2012-2018), A7 (2012-2018), Q7 3.0T (2011-2015), SQ5 (2014-2017), and select Porsche Cayenne and Panamera models.
Always verify the original manufacturer reference stamped on your component before ordering. For 06E127025G, inspect matching OE cross-references and ensure related high-pressure seals, followers, or grommets are renewed during service.
Vehicle & Engine Fitment
| Vehicle | Engine | Years |
|---|---|---|
| Audi S4 / S5 B8 B8.5 | Audi / VW / Porsche EA837 3.0L V6 Supercharged TFSI (CGWB / CTUB / CREC) | 2010-2017 |
| Audi A6 C7 / A7 4G8 | Audi / VW / Porsche EA837 3.0L V6 Supercharged TFSI (CGWB / CTUB / CREC) | 2012-2018 |
| Audi Q7 4L / SQ5 8R | Audi / VW / Porsche EA837 3.0L V6 Supercharged TFSI (CGWB / CTUB / CREC) | 2011-2017 |
| Porsche Cayenne / Panamera | Audi / VW / Porsche EA837 3.0L V6 Supercharged TFSI (CGWB / CTUB / CREC) | 2011-2018 |
Technical Specifications
| Specification | Value |
|---|---|
| System Type | Hitachi / Audi FSI 200-Bar High Pressure Direct Injection |
| Maximum Operating Fuel Pressure | 200 bar (2,900 psi / 20.0 MPa regulated system pressure) |
| Pump Drive Configuration | Tri-Lobe Camshaft Follower Driven via Hardened Roller Tappet |
| Quantity Control Solenoid | Integrated Electronic Fuel Metering Valve (N290 PWM Modulated) |
| Pump Mounting Flange Torque | 20 N·m (15 lb-ft) tightened evenly in criss-cross stages |
| High-Pressure Flare Nut Tube Torque | 27 N·m (20 lb-ft) rigid stainless steel delivery pipe |
| Low-Pressure Supply Line Torque | Banjo fitting 15 N·m / Quick-connect click retention |
| Internal Piston Seals Architecture | Multi-Lip Dynamic Fluorocarbon Piston Seal with Fuel Scavenge Port |
| Manufacturer | Hitachi Astemo, Ltd. (Tier-1 OEM for Audi AG & Volkswagen Group) |
| Production Reference | Hitachi HPP0007 / Audi OE 06E 127 025 G |
| Operating PressureCore Spec |
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
- [
- {
- "step": 1,
- "title": "Low & High Pressure Fuel System Depressurization",
- "instruction": "Pull 15A low-pressure fuel pump fuse from passenger dashboard fuse block. Start engine and let it run until it stalls from fuel depletion, then disconnect negative battery cable."
- },
- {
- "step": 2,
- "title": "Intake Ducting & Supercharger Area Clearance",
- "instruction": "Disconnect mass air flow sensor wiring and remove intake bellows ducting. Clear access to the rear driver-side cylinder head where the mechanical HPFP resides."
- },
- {
- "step": 3,
- "title": "N290 Solenoid Harness & Fuel Lines Disconnection",
- "instruction": "Unclip wiring plug from the N290 fuel metering valve. Crack open high-pressure flared fitting slowly with a 17mm flare nut wrench while wrapping a shop towel around the union."
- },
- {
- "step": 4,
- "title": "Flange Fasteners Removal & Roller Tappet Inspection",
- "instruction": "Back out mounting bolts in alternating half-turns to release internal plunger spring load squarely. Extract pump and inspect internal roller cam follower for surface spalling or binding."
- },
- {
- "step": 5,
- "title": "O-Ring Lubrication, Installation & Sequence Torquing",
- "instruction": "Coat new Viton housing O-ring and roller tappet with fresh synthetic engine oil. Seat pump into bore and torque flange bolts evenly to 20 N\u00b7m (15 lb-ft). Torque high-pressure pipe flare nut to 27 N\u00b7m (20 lb-ft)."
- }
- ]
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.