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Catalog / BOSCH / 04E127025G
BOSCH

04E127025G

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SolenoidBosch / VW 200-bar Direct Petrol Injection (TSI/TFSI)Euro 6

BOSCH 04E127025G High Pressure Fuel Pump Volkswagen Golf 7 Jetta Passat Tiguan Audi A3 1.4 TSI EA211 0261520261

Reference data for Bosch 04E127025G common rail injector · OEM 04E127025D, 0261520261, 0261520262, HPP0021 · Application Volkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA)
Engine Platform:Volkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA) →
OE REFERENCE04E127025D, 0261520261, 0261520262, HPP0021
CONTROL VALVEIntegrated Fuel Metering Solenoid Valve N290
NOZZLE-
RAIL PRESSURE200 bar
EMISSIONEuro 6 / ULEV II
WARRANTY12 Months
01

Compatible Injectors

OEM Ref
02

Vehicle & Engine Fitment

VehicleEngineYears
Volkswagen Golf Mk7 / Jetta / Passat / TiguanVolkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA)2013-2020
Audi A3 8V / Q3 8UVolkswagen / Audi EA211 1.4L & 1.5L TSI / TFSI (CZDA / CZEA / CHPA / DADA)2013-2019
03

Technical Specifications

SpecificationValue
Operating PressureCore Spec
Pump TechnologySingle Plunger Mechanical Camshaft-Driven HPFP
Flow ControlIntegrated Solenoid Fuel Metering Valve (N290)
Mounting Flange Torque20 N·m
High Pressure Line Torque27 N·m
Drive TypeIntake Camshaft Tri-Lobe Drive with Roller Tappet
Fuel TypeGasoline / Premium Unleaded Direct Injection
OE Cross References04E127025G, 04E127025B, 04E127025D, 0261520261, 0261520262
Failure SymptomsLong crank on warm engine, P0087 low rail pressure, hesitation under load, limp mode
Diagnostic TestMeasure LPFP lift pressure (4-7 bar) vs HPFP peak rail pressure (140-200 bar)
CIRCUIT ASSEMBLY

Matched High-Pressure Fuel Injectors (Fuel Circuit Assembly)

Directly supplied by this high-pressure pump. Verify injector backleak balance if rail pressure fails to build during engine cranking.

BOSCHExact Engine & Chassis Match
04E906036AR
Gasoline Direct Injection (GDI) • 200 bar
🚙 Audi A3 (8V) / Q3 (8U) (CHPA)
Technical Specifications & Pinout
BOSCHExact Engine & Chassis Match
04E906036E
Gasoline Direct Injection (GDI) • 200 bar
🚙 Audi A3 (8V) / Q3 (8U) (CHPA)
Technical Specifications & Pinout
BOSCHExact Engine & Chassis Match
04E906036Q
Gasoline Direct Injection (GDI) • 200 bar
🚙 Engine Code CHPA
Technical Specifications & Pinout
BOSCHExact Engine & Chassis Match
05E906036C
Gasoline Direct Injection (GDI) • 350 bar
🚙 Engine Code CHPA
Technical Specifications & Pinout
04

Installation Tips

  1. [
  2. "Disconnect 12V battery and relieve high-pressure fuel system residual pressure via scan tool or low-pressure port.",
  3. "Disconnect electrical connector from fuel metering valve N290 and unthread low-pressure feed hose.",
  4. "Counter-hold fitting and loosen high-pressure steel rail flare nut using a flare nut wrench.",
  5. "Evenly back out the two M6 mounting bolts half a turn at a time to prevent uneven spring tilting pressure.",
  6. "Inspect roller tappet in the cylinder head bore for scuffing, flat spotting, or excessive play; replace if worn.",
  7. "Lubricate new O-ring with clean motor oil, seat pump squarely, and torque mounting bolts alternately to 20 N·m.",
  8. "Hand-thread high-pressure line flare nut until seated, then torque precisely to 27 N·m; reconnect N290 plug.",
  9. "Cycle ignition to pressurize low-pressure circuit, verify zero fuel leaks around fittings, and clear stored DTCs."
  10. ]
05

Diagnostic Trouble Codes & Fault Protocols

Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:

P0087Critical

Fuel Rail / System Pressure Too Low

Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.

P0087 Guide →🧪 Backleak Calculator
P0201 - P0208High

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.

P0201 Circuit Guide →
P0300 / P0301+High

Cylinder Misfire & Balancing Deviation

Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.

P0300 Misfire Protocol →💻 IMA Coding Tool📐 Washer Thickness
P0088High

Fuel Rail / System Pressure Too High

Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.

P0088 Guide →📊 Rail Pressure Converter
Browse all 61 Diesel Diagnostic Trouble Codes in our Workshop Hub ->
WORKSHOP PROTOCOLS

Technical Diagnostic & Service Protocols

Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.

COMMON RAIL WORKSHOP DIAGNOSTICS

Common Rail High-Pressure Pump Diagnostics Guide

Diagnose common rail high-pressure pump failure: suction vacuum, CP4 roller glitter, plunger wear, air ingress & P0087 hard start. Workshop bench testing.

Read Technical Protocol
COMMON RAIL WORKSHOP DIAGNOSTICS

Fuel Metering Valve (IMV/SCV) Diagnostics Guide

Diagnostic guide for common rail fuel metering valves (IMV/SCV/FCA/MPROP). Normally open vs closed, coil resistance, PWM duty cycle & P0088 / P0089 test.

Read Technical Protocol
OBD-II DIAGNOSTIC PROTOCOL

P0087 Low Rail Pressure Diagnosis Guide

Step-by-step workshop diagnostic protocol for OBD-II DTC P0087 (Fuel Rail Pressure Too Low). 5-stage troubleshooting tree: backleak testing, SCV valve, PRV valve, and high-pressure pump.

Read Technical Protocol
COMMON RAIL WORKSHOP DIAGNOSTICS

Rail Pressure Relief Valve Diagnostics Guide

Common rail pressure relief valve (PRV) testing guide. Diagnose hot start stalls, P0087 rail pressure loss, return line leakage & single vs 2-stage valves.

Read Technical Protocol