BMW 13538616079 Fuel Injector

Disconnect the battery negative (-) cable in the cargo compartment. Prior to disconnecting the battery, read the battery disconnection cautions. Remove the cabin microfilter housing, followed by the ignition coil cover and the ignition coil at the corresponding cylinder of the fuel injector service. Maintain a high level of cleanliness when servicing ignition coils, as fuel or oil residue can break down the electrical resistance qualities of silicone used in ignition coil production, leading to coil failure. Remove the fuel line to the corresponding fuel injector by loosening fasteners and removing the fuel line from the rubber mount. If several injectors are being removed, ensure that each injector is reinstalled in its original location. Seal the injector with a cap and plug the fuel rail connections with plugs from the BMW special tool kit. Seal removed high-pressure fuel lines with caps from the same tool kit. Maintain a clean work area when servicing the high-pressure fuel system, as contaminants can cause a malfunction, and seal all fuel system openings with protective caps. Replace high-pressure fuel lines if tightened ten times. Unlock and remove the electrical connector from the injector, then remove the fastener and ground wire. Remove the hold-down element and injectors in the specified order by removing the bolts, lifting off the hold-down bracket, and pulling the injectors straight up. If an injector is stuck in the cylinder head, install the BMW special tool into position, thread screws in by hand a few threads, and screw in the threaded pull-out piece until it is possible to screw threaded sleeves onto the injectors. The threaded pull-out piece has a left-handed thread; tighten the threaded sleeves onto the injectors and then tighten the screws. Set the torque wrench to 5 Nm, fit it along with the special tool on the square head of the special tool, and turn the torque wrench in a clockwise direction until the injector is extracted from the cylinder head. The torque wrench set to 5 Nm corresponds to a maximum tensile force of 2000 N, and the injector must be replaced if the torque wrench indicates that 5 Nm is exceeded. Once the injector is removed, install sealing caps to the fuel line connection and injector tip, which are available from the BMW dealer parts department.

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.

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

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

Remember to replace the uncoupling element and the PTFE sealing ring. Remove the PTFE protective cap no more than 10 minutes before installation, as the sealing ring swells once the cap is removed.

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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