Skip to content
Home » BMW E39 Spark Plug Socket Size and Replacement Guide

BMW E39 Spark Plug Socket Size and Replacement Guide

    BMW E39 Spark Plug Socket Size

    Overview

    If you own a BMW E39 and need to replace the spark plugs, it’s important to know the correct socket size to use. Using the wrong size socket can lead to damage or improper installation of the spark plugs. In this article, we will provide you with the necessary information about the spark plug socket size for the BMW E39.

    Spark Plug Socket Size Chart

    To make it easier for you, here is a table that lists the spark plug socket size for different BMW E39 models:

    BMW E39 Model Spark Plug Socket Size
    520i 16mm
    523i 16mm
    525i 16mm
    528i 16mm
    530i 16mm
    540i 16mm

    Steps to Replace Spark Plugs

    If you’re planning to replace the spark plugs in your BMW E39, here are the steps you can follow:

    1. Make sure the engine is cool before starting any work.
    2. Locate the spark plug wires or ignition coils on top of the engine.
    3. Remove the spark plug wires or ignition coils carefully to access the spark plugs.
    4. Using the correct spark plug socket size (16mm), attach it to a ratchet or extension.
    5. Insert the spark plug socket into the spark plug well and carefully loosen the spark plug by turning it counterclockwise.
    6. Once the spark plug is loose, remove it from the well using the socket and extension.
    7. Inspect the old spark plug for any signs of damage or wear.
    8. If necessary, gap the new spark plug to the manufacturer’s specifications using a spark plug gap tool.
    9. Insert the new spark plug into the spark plug well and hand-tighten it clockwise.
    10. Finally, use the spark plug socket and ratchet to tighten the spark plug to the recommended torque specification.
    11. Repeat the process for each spark plug.
    12. Reinstall the spark plug wires or ignition coils, ensuring they are securely connected.

    Conclusion

    Knowing the correct spark plug socket size for your BMW E39 is essential when it comes to replacing the spark plugs. By following the steps mentioned above and using the appropriate socket size, you can ensure a successful spark plug replacement and maintain the optimal performance of your vehicle.