2011 BMW 335dFACTORY OEM SERVICE PROCEDURE

Piezo Injector Operation: Notes

Fig 1: Piezo Injector Operation Diagram
G06896063Courtesy of BMW OF NORTH AMERICA, INC.
INDEX EXPLANATION CHART

Index Explanation
1 Coupler module
2 Control valve
3 Bypass
4 Nozzle needle
5 Restrictor
6 Control volume
7 Outlet
8 Supply duct to nozzle
Fig 2: Piezo Injector Operation Diagram - Injector Opening
G06896064Courtesy of BMW OF NORTH AMERICA, INC.
Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.