Automotive Service Excellence (ASE) Brakes Certification Practice Exam

The recommended procedure for bleeding brakes is to start with the wheel farthest from the master cylinder and work towards the nearest one. This approach is effective because it ensures that any air trapped in the brake lines is pushed out in the order that prevents it from needing to be re-bleed as you move from one wheel to the next.

When you bleed the farthest wheel first, you eliminate the air from the longest brake line, which is typically where air is most likely to be trapped. By working your way towards the master cylinder, you progressively clear any remaining air from the lines, ultimately achieving a firm brake pedal. This systematic method also improves the effectiveness of the braking system by ensuring that the brake fluid circulates correctly and any contaminants are flushed out.

Additionally, bleeding all wheels simultaneously or performing the process in a random order could result in incomplete removal of air, potentially leading to spongy brakes or reduced braking effectiveness.