What Causes Soft Brakes in New Cars?
2 Answers
Car brakes feel soft due to air entering the brake fluid lines. Effects of air in the brake lines: When air enters the brake lines, the brake fluid under high pressure will lack sufficient strength. Although braking power is still present, the maximum braking force is significantly reduced. In such cases, the brake system should be promptly bled to remove the air. Brake pad maintenance methods: Under normal driving conditions, inspect the brake pads every 5,000 kilometers. Check not only the remaining thickness but also the wear condition of the pads, ensuring both sides wear evenly and retract properly. Any abnormalities should be addressed immediately. Brake pads generally consist of two parts: an iron backing plate and friction material. Do not wait until the friction material is completely worn out before replacing the pads.
I've found several common reasons why new car brakes may feel soft initially. During the break-in period, the brake pads and rotors need time to mate properly - the fresh surfaces lack optimal friction at first but become more responsive after some driving. Air trapped in the brake fluid lines is another frequent issue; improper bleeding during assembly can make the pedal feel spongy. Many modern vehicles are deliberately calibrated with softer initial brake feel for comfort, a design characteristic particularly noticeable in certain brands. Performing several controlled hard and gradual stops under safe conditions helps accelerate the bedding process, with most systems improving within a few hundred kilometers. If softness persists, inspect for potential issues like misaligned rotor installation or air bubbles/leaks in hoses - while manufacturing defects are rare in new vehicles, prompt dealership inspection is crucial. Always prioritize safety; don't delay addressing brake concerns to avoid potential hazards.
