How Many Kilometers Should Brake Pads Be Run In After Replacement?
3 Answers
Brake pads need to be run in for 200 kilometers after replacement. Below is the relevant information: Reasons for run-in: Brake pads are composed of steel plates, adhesive heat insulation layers, and friction blocks. Used brake pads have been run in with brake discs, resulting in a large contact surface with many uneven contact points, providing strong braking force. New brake pads have a relatively flat surface and a smaller contact area with the brake disc, leading to reduced braking force. This may cause the newly replaced brake pads to feel less effective, hence the need for run-in. Function of brake pads: Automotive brake pads refer to the friction materials fixed on the rotating brake drums or brake discs of the wheels. The friction linings and blocks bear external pressure to generate friction, thereby achieving the purpose of vehicle deceleration.
I've been driving for over ten years, and whenever I change brake pads, I recommend a break-in period of about 300 to 400 kilometers. During this process, the brake pads and rotors need to gradually conform evenly to avoid squealing noises or unstable braking. For the first few days, it's best to drive smoothly, avoid hard braking, and do more city driving on flat roads. I've encountered friends who immediately did hard braking on highways after changing pads, resulting in uneven wear, shortened lifespan, and compromised safety. After the break-in, the braking performance will noticeably improve, making the brakes feel more responsive. Remember not to carry heavy loads during this period to avoid extra strain. Overall, be patient for a few days to a week, and you'll return to optimal performance.
As someone who frequently works on my own car, I believe the optimal brake pad break-in period should be between 300-500 kilometers. Newly installed pads have rough surfaces that require gentle driving to gradually smooth out, otherwise they may overheat, warp, or generate noise. During daily driving, maintain low speeds and steady acceleration, avoiding sudden stops or starts. This break-in process enhances brake system reliability and reduces the risk of abnormal noises. After each pad replacement, I routinely check temperature and performance to ensure everything functions properly. This approach not only provides peace of mind but also extends component lifespan.
