BMW 13538616079 Fuel Injector

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Disconnect the battery negative (-) cable in the cargo compartment, ensuring to read the battery disconnection cautions beforehand. Remove the cabin microfilter housing and the ignition coil cover, followed by the ignition coil at the corresponding cylinder of the fuel injector service. Maintain cleanliness when servicing ignition coils, as fuel or oil residue can compromise the electrical resistance of the silicone used in their production, leading to potential coil failure. Next, remove the fuel line to the corresponding fuel injector, taking precautions as the fuel line is under high pressure, which may cause fuel to be expelled forcibly. Avoid smoking or working near heat sources, and keep a fire extinguisher nearby. Ensure the engine temperature is below 40°C (104°F) before working on the fuel system, unscrew the fuel tank cap to relieve pressure, and plug open fuel lines and fittings. Use a clean shop towel around the fitting before disconnecting to manage residual fuel pressure, and to reduce pressure, place a towel over the injector and gently tap with a wrench. Maintain a clean work area to prevent contaminants from causing system malfunctions, seal all fuel system openings with protective caps, and replace high-pressure fuel lines if they have been tightened 10 times. If multiple injectors are removed, ensure each is reinstalled in its original location. Unlock and remove the electrical connector, then remove the fastener and hold-down bracket before taking out the injector. Seal the injector and fuel rail connections with caps and plugs from the BMW special tool kit. If an injector is stuck in the cylinder head, use the appropriate BMW special tools to carefully remove it, and once removed, install sealing caps on the injector tip and fuel line connection, which can be obtained from the BMW dealer parts department.

Tolerance ranges for injector-quantity adjustment are specified using a six-digit number combination, which is crucial for fuel injector adaptation.

The cabin microfilter housing, ignition coil cover, and the ignition coil corresponding to the fuel injector service need to be removed.

To remove the fuel rail and injectors, first detach the fuel line, disconnect the connector strip, remove fasteners, and take out the fuel rail. To remove individual injectors, pry the retaining clip from the injector and pull it from the rail.

When working at the cylinder head, install the injector and the hold-down bracket, ensuring the fastener is finger tight to allow for injector adjustment. Then, install the electrical connector.

Clean the contact surfaces of the uncoupling element and cylinder head.

Remove the cabin microfilter housing, followed by the ignition coil cover and the ignition coil at the corresponding cylinder of the fuel injector service.

An injector quantity compensation must be performed with a BMW scan tool if an injector is replaced, using the adjustment value printed on the injector body, which must be noted prior to installation.

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