Do Brake Pads and Brake Discs Need to Be Replaced Together?
4 Answers
Brake pads and brake discs do not need to be replaced together. The method for replacing brake pads is as follows: 1. Open the engine compartment to check the brake fluid level to prevent overflow during replacement; 2. Remove the wheel where the brake is located; 3. Remove the bolts of the brake caliper and take out the brake pads; 4. Install the new brake pads, tighten the guide bolts, and complete the replacement. The steps for replacing the brake disc are: 1. Lift the vehicle and remove the tire; 2. Remove the screws of the brake caliper, open the brake caliper, and remove the old brake pads; 3. Push the brake piston back and install the new brake pads; 4. Reinstall the brake caliper, tighten the caliper screws to the required torque, and reinstall the tire; 5. Press the brake several times to eliminate the gap between the brake pads and the brake disc, allowing the brake piston to reset; 6. Check whether the brake oil pump is working properly.
I've been driving for several years, and usually, brake pads and brake discs don't need to be replaced together. Brake pads wear out relatively quickly, typically needing replacement every 20,000 to 40,000 kilometers, mainly because the material is softer and wears down faster due to friction. Brake discs are much harder and can last over 60,000 kilometers, depending on your driving habits. If you frequently drive in stop-and-go city traffic, using the brakes more often, both may wear out faster together. On the other hand, if you drive mostly on highways, the discs will last longer. When replacing just the pads, it's crucial to check the disc thickness. If they're too thin or have deep grooves, they should be replaced. Otherwise, the new pads can get scratched or cause brake shudder. I once experienced squeaking sounds because I didn’t replace the discs, which affected the driving experience. It's advisable to have the mechanic measure the disc thickness during every maintenance check—don’t skimp on safety to save money.
I enjoy DIY car repairs and have replaced the brake system several times. Brake pads and rotors don't necessarily need to be changed together. Pads are like consumables and need replacement every year or two, while rotors can last through several pad changes. Before starting, I measure the rotor thickness with calipers - if it's below 8mm, it's time for replacement, otherwise the new pads might cause unstable braking or noise. The rotor surface also needs resurfacing if it's rusty or uneven, as this affects contact. Driving conditions matter greatly - mountainous areas with lots of hills cause faster wear and rotor warping, while city driving at lower speeds makes them last longer. It's wise to check the rotors when changing pads to avoid doing the job twice.
Safety comes first, and I believe this issue is a matter of life and death. Brake pads and brake discs don't necessarily need to be replaced at the same time, but a thorough inspection is essential during replacement. Pads wear out faster and are more prone to depletion; if the discs are too thin or rusted, replacing only the pads may increase the risk of brake noise or longer stopping distances. In daily driving, don't overlook maintenance records. Keeping the disc thickness above the manufacturer's standards and having a technician evaluate the discs every time you replace the pads will ensure peace of mind on the road and help avoid accidents.
