Do I need to replace both the brake disc and the brake pad at the same time? Many people have doubt on it. Generally, brake pads wear faster than brake discs and therefore tend to need to be replaced more frequently. The replacement cycle for brake pads is generally around 30,000-50,000 km, while rear brake pads may need to be replaced every 60,000-100,000 km. The replacement cycle for brake discs is usually 60,000-80,000 km or longer, about after two brake pad replacements.
The degree of wear of the brake pad can be judged by observing its thickness. When the brake pad is worn to less than 5 mm, it should be considered for replacement. In addition, if there is a metallic friction sound when braking, the pedal feels light or the brakes are difficult, it also indicates that the brake pad is severely worn and needs to be replaced. The wear of the brake disc requires checking its thickness and surface condition. When the wear depth of the brake disc reaches more than 2 mm, it is usually recommended to replace it. If the brake disc is cracked, deformed, severely rusted or has an uneven surface, it should also be replaced immediately. In some cases, if deep scratches or grooves appear on the surface of the brake disc, it may affect the service life and braking performance of the new brake pads, and replacement of the brake disc may be recommended.
In general, if the brake pads are worn to the point where they need to be replaced, and the wear of the brake disc is still within an acceptable range, then only the brake pads can be replaced. However, if the brake disc is severely worn or damaged, for safety and performance reasons, it is recommended to replace both the brake disc and the brake pads. When replacing, you should choose qualified products that match the vehicle and have professional technicians perform the replacement. The replacement cycle of brake pads and brake discs is usually affected by many factors, including driving habits, road conditions, vehicle load, and climate conditions.
What is the specific replacement cycle of brake pads and brake discs?
Brake pad replacement cycle: Generally speaking, the service life of front brake pads is about 30,000-50,000 kilometers, while rear brake pads may need to be replaced every 60,000-100,000 kilometers. The thickness of the brake pad is an important indicator to determine whether it needs to be replaced. When the thickness of the brake pad is less than 5 mm, it is recommended to replace it. In addition, if there is a metal friction sound when braking, the pedal feels light or the brakes are difficult, it also indicates that the brake pads are severely worn and need to be replaced.
Brake disc replacement cycle: The replacement cycle of the brake disc is usually around 60,000-80,000 kilometers, which is about two brake pad replacements. When the wear depth of the brake disc reaches more than 2 mm, it is usually recommended to replace it. If the brake disc is cracked, deformed, severely rusted or has an uneven surface, it should also be replaced immediately.
In actual use, it is recommended that car owners regularly inspect and maintain the brake system to ensure driving safety. If the brake disc is severely worn, it should be replaced in time to avoid safety hazards caused by reduced braking performance. At the same time, choosing the right brake pad and brake disc material also plays an important role in extending the replacement cycle.
What precautions should be taken when replacing brake pads and brake discs?
When replacing brake pads and brake discs, there are some important precautions to follow to ensure a safe and correct replacement process:
Check the degree of wear: Before replacing, the wear degree of the brake pads should be checked. Generally, when the thickness of the brake pads is less than 3mm, they should be replaced. When the wear depth of the brake disc reaches 2mm, it should also be considered for replacement.
Use genuine parts: When replacing, genuine parts that match the vehicle should be used, and ensure that the packaging is intact, and the anti-counterfeiting mark and packaging logo are consistent with the product logo.
Professional tools: Use professional tools and equipment for replacement to ensure correct and safe installation.
Check the brake disc: When replacing the brake pads, the brake disc should be checked for cracks, deformation or severe rust. In these cases, the brake disc also needs to be replaced.
Run-in new brake pads: After replacing new brake pads, proper running-in is required to ensure the best braking effect.
Check the brake fluid: When replacing the brake pads, check the brake fluid level and make sure that the brake fluid used is consistent with the original brake fluid brand to avoid mixing different brands of brake fluid.
Tire reset: After the replacement is completed, the tire should be installed correctly and tightened diagonally to protect the tire and wheel hub.
Test the brake: After the replacement is completed, a road test should be carried out to test the brake performance to ensure that there is no abnormality.
Observe the performance after replacement: Within a period of time after the replacement, pay attention to whether the brakes have abnormal noise, shaking or other abnormal phenomena, and deal with possible problems in time.
Professional installation: If you are not familiar with these operations, it is recommended to have a professional technician perform the replacement.
Follow these precautions to ensure the correct replacement and good performance of the brake system, thereby ensuring driving safety.
What other parts should be checked when maintaining the brake system?
When performing brake system maintenance, in addition to checking and replacing brake pads and brake discs, the following parts should also be checked:
Brake fluid: Check the level and quality of the brake fluid, and replace the brake fluid if necessary to ensure the normal operation of the brake system.
Brake lines: Check the brake lines for signs of leakage, damage or aging, and repair or replace them in time.
Brake calipers: Check whether the brake calipers move smoothly, clean the dirt and rust on the calipers, and ensure that they work properly.
Guide pins and return springs: Check whether the guide pins are worn or stuck to ensure that the brake pads can return to their original positions correctly.
Brake cylinders: Check whether the cylinders are leaking and ensure that they are well sealed.
Brake booster: For vehicles equipped with a booster, check the working condition of the booster.
Parking brake: Check whether the handbrake or electronic parking system is working properly.
Brake pad wear indicator: Check whether the wear indicator on the brake pad is worn to the extent that it needs to be replaced.
Wheel rims and bearings: Check whether the wheel rims are corroded or damaged, and whether the bearings need to be lubricated or replaced.
Brake disc surface: Check whether the brake disc surface is flat and remove rust and dirt.
Contact surface of brake pad and brake disc: Make sure the contact surface is clean and free of foreign matter.
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