how to check the fuel injectors on my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Disconnect Battery

• Disconnect the negative terminal of the battery to prevent electrical shorts while working on the fuel injectors.

3. Remove Engine Cover (if applicable)

• Remove any fasteners securing the engine cover using a socket set.
• Carefully lift off the engine cover and set it aside.

4. Access Fuel Injectors

• Locate the fuel rail and the fuel injectors attached to it.
• Disconnect the electrical connectors from each fuel injector by pressing the release tab and pulling them off.

5. Remove Fuel Rail

• Using a socket wrench, remove the bolts securing the fuel rail to the intake manifold.
• Carefully lift the fuel rail off the injectors, ensuring not to damage the O-rings on the injectors.

6. Inspect and Test Injectors

• Visually inspect each injector for cracks, leaks, or carbon buildup.
• Using a multimeter, measure the resistance across the terminals of each injector. Compare the readings with the specifications found in the repair manual (typically around 12-16 ohms).
• If any injector is outside of this range, it should be replaced.

7. Clean or Replace Injectors

• If injectors are clogged, clean them using a fuel injector cleaning kit.
• If they are damaged or not functioning properly, replace them with new injectors.

8. Reassemble Components

• Reinstall the fuel rail, ensuring injectors are seated properly.
• Reconnect the electrical connectors to each injector.
• Reattach the engine cover and secure with the bolts.
• Reconnect the battery terminal.