my BMW 3 Series G20/G21 (2019-2024) dashboard lights are flickering, what could be the cause?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, fuse puller.
• Ensure the vehicle is parked on a flat surface and the ignition is turned off.
• Disconnect the negative terminal of the battery to prevent electrical shock.

2. Inspect the Battery

• Use a multimeter to check the battery voltage. It should read between 12.4 to 12.7 volts when the vehicle is off.
• Tighten or clean the battery terminals if they are corroded or loose.
• If the battery is low or faulty, replace it with a new battery of the same specifications.

3. Check the Alternator

• Start the engine and measure the voltage at the battery terminals; it should read between 13.7 to 14.7 volts.
• If the voltage is below this range, the alternator may need replacement.
• Inspect the alternator belt for wear or damage.

4. Inspect Fuses

• Locate the fuse box (typically under the dashboard or in the engine compartment).
• Use a fuse puller to remove and inspect any fuses related to the dashboard and instrument cluster.
• Replace any blown fuses with the correct amperage rating.

5. Examine Wiring Harness

• Visually inspect the wiring harness connected to the dashboard for any signs of wear, fraying, or loose connections.
• Repair or replace any damaged wires or connectors.
• Ensure all connections are secure and free of corrosion.