my BMW X3 G01 (2018-2024) has a hard brake pedal is this normal

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Wear safety gloves and goggles.

2. Inspect and Replace Brake Fluid

• Remove the brake reservoir cap and check fluid condition.
• If fluid is contaminated or low, use a turkey baster to remove old fluid.
• Refill with manufacturer-recommended brake fluid (usually DOT 4).
• Replace cap securely.

3. Inspect Brake Booster

• Disconnect the vacuum line from the brake booster.
• Check for any cracks or damage to the vacuum line; replace if necessary.
• If the line is fine, test the brake booster by pressing the brake pedal and listening for hissing sounds that indicate a vacuum leak.

4. Replace Brake Booster (if necessary)

• Disconnect the battery to prevent electrical issues.
• Remove the brake master cylinder by unbolting it from the brake booster.
• Unbolt the brake booster from its mounting points and remove it from the vehicle.
• Install the new brake booster in reverse order of removal, ensuring all bolts are tightened to the manufacturer's torque specifications.

5. Bleed the Brake System

• After replacing components, bleed the brake system using a brake bleeder kit or manual bleeding method.
• Start from the furthest wheel from the master cylinder and work your way to the nearest wheel.
• Ensure there are no air bubbles in the brake lines.