1. Caliper Piston Over-Extension: During the brake pad replacement, it's important to ensure that the caliper piston is not over-extended. If the piston is pushed out too far, it can cause the brake pads to rub against the rotor even when the brakes are not applied, generating heat and a burning smell. Make sure the caliper piston is properly seated and retracted before reinstalling the brake pads.
2. Brake Fluid Leak: Check for any brake fluid leaks around the calipers, brake lines, or master cylinder. Leaking brake fluid can come into contact with hot components, such as the brake rotors, producing a burning odor. Inspect the brake system for any signs of fluid leakage and rectify any issues.
3. Glazed Brake Pads: If the brake pads were not properly bedded in after installation, they can develop a glazed surface that reduces their effectiveness and causes excessive heat buildup. This can result in a burning smell and potentially damage the brake components. To resolve this, perform a proper brake bedding procedure as per the manufacturer's recommendations.
4. Improper Brake Pad Installation: Ensure that the brake pads have been installed correctly and are compatible with your vehicle's model and brake system. Incorrectly fitted brake pads or using pads not designed for your car can cause rubbing and overheating, leading to the burning smell and smoke. Double-check the installation process and verify that the correct brake pads have been used.
5. Parking Brake Mechanism: If your 206 has a mechanical parking brake (handbrake), check the adjustment and release mechanism. If the parking brake is not fully disengaged, it can cause the brake pads to drag against the rotors even when the foot brake is not applied, resulting in friction and the odor of burning rubber. Ensure that the parking brake is releasing properly and not causing any contact between the pads and rotors.
If you are unable to identify or resolve the issue yourself, it is recommended to consult with a qualified mechanic or automotive technician who can inspect the brake system and diagnose the exact cause of the burning smell and smoke.
