BMW X3 2005

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation




NOTE
This procedure involves removing the complete fuel rail with injectors.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Properly relieve the fuel system pressure.
  4.  
  5. Mark the locations of each oxygen sensor connector for proper reinstallation.
  6.  
  7. Remove or disconnect the following:

    Negative battery cable
     
    Connectors from clips on fuel rail
     
    Intake Air Temperature (IAT) sensor connector
     
    Plug connection on solenoid valve for camshaft adjustment (VANOS) unit
     
    Terminal strip for fuel injectors from fuel rail
     

  8.  
  9. Unclip the fuel line from its holder, then unlock the fuel line from the cylinder head at the rear (be prepared to catch any fuel).
  10.  
  11. Remove the retaining bolts and remove the fuel rail with the fuel injectors.
  12.  

To install:

  1. Coat the sealing rings of the injectors with anti-seize compound prior to fitting.
  2.  
  3. Install the fuel injectors and fuel rail to the engine.
  4.  
  5. Install or connect the following:

    Fuel line
     
    Terminal strip to fuel injectors
     
    Connectors as removed
     
    Negative battery cable
     

  6.  

 
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