why does my BMW 5 Series G30/G31 (2017-2024) dashboard say "brake fluid level low"?

Solution

1. Preparation

• Gather tools and materials:
  • Brake fluid (DOT 4 or as specified in the owner's manual)
  • Clean cloth
  • Funnel
  • Safety goggles and gloves
• Ensure the vehicle is parked on a level surface and the engine is off.

2. Check and Refill Brake Fluid

• Locate the brake fluid reservoir, typically found near the back of the engine bay, near the driver's side.
• Remove the cap from the brake fluid reservoir.
• Use a clean funnel to add brake fluid to the reservoir until it reaches the "MAX" line.
• Clean any spilled fluid with a cloth and replace the cap securely.

3. Inspect Brake System

• Check for any visible signs of leaks around brake lines, calipers, and the master cylinder.
• If leaks are found, replace damaged components as necessary.
• If no leaks are visible but the fluid level was low, monitor the brake system for any further drops in fluid levels.

4. Test the Brake System

• Start the vehicle and press the brake pedal several times to ensure proper brake feel.
• Check the dashboard to confirm that the warning light has turned off.
• If the warning persists, further inspection of the brake system may be required.