my BMW 3 Series E90/E91 (2005-2012) dashboard lights keep flickering, what could it be?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety while working on electrical components.

2. Clean Battery Terminals

• Remove the battery cables from the terminals (positive first, then negative).
• Clean the terminals and cable ends with a wire brush to remove corrosion.
• Reattach the cables securely (negative first, then positive).

3. Replace Fuses

• Locate the fuse box and identify the fuses related to the dashboard lights.
• Remove any blown fuses and replace them with new fuses of the same amperage.

4. Test and Replace Battery (if needed)

• If the battery voltage is low (under 12.4 volts), charge the battery or replace it if it fails to hold a charge.
• Ensure the battery is securely mounted and connections are tight.

5. Inspect and Replace Alternator (if needed)

• If the alternator output is outside the specified range, remove the alternator for inspection.
• Replace the alternator if it is malfunctioning and recheck the voltage output after installation.