06H127025Q

1. [
2. {
3. "step": 1,
4. "title": "Relieve Rail Pressure & Disconnect Low Pressure Line",
5. "instruction": "Depressurize fuel system using scan tool test function or fuse pull. Remove low-pressure spring clamp and detach rubber feed line."
6. },
7. {
8. "step": 2,
9. "title": "Detach High Pressure Steel Pipe",
10. "instruction": "Loosen steel fuel line flare nut (27 N·m) while holding pump outlet fitting with counter-wrench to prevent adapter distortion."
11. },
12. {
13. "step": 3,
14. "title": "Remove Flange Screws & Inspect Roller Tappet 06L109311",
15. "instruction": "Unscrew two M8 flange bolts evenly in alternating half-turns. Remove pump and withdraw roller tappet 06L109311. Check roller for flat spots or pin play."
16. },
17. {
18. "step": 4,
19. "title": "Install Pump, Torque Fasteners & Bleed Air",
20. "instruction": "Lubricate new O-ring seal. Tighten mounting bolts diagonally to 20 N·m. Torque steel line to 27 N·m. Cycle ignition 3 times before starting engine."
21. }
22. ]

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