Brake Pad Replacement Cycle Draws Attention – Multiple Factors (Vehicle Type, Habits) Matter Most

With the number of domestic registered vehicles exceeding 350 million, brake pads-known as the "last line of defense" for driving safety-have made their replacement cycle a constant focus of concern among car owners. Recently, journalists visited automotive 4S shops, chain maintenance facilities, and industry associations across the country, and found that nearly 60% of car owners have misunderstandings about brake pad replacement: some strictly adhere to the rigid belief that "brake pads must be replaced every 30,000 kilometers," leading to premature replacement and resource waste; others ignore wear signals and only seek emergency repairs when braking fails, which ultimately causes severe damage to brake discs and increases maintenance costs by 3 to 8 times. In response to this situation, industry experts call for "vehicle-specific and condition-specific" brake pad replacement, emphasizing that scientific judgment is more important than a fixed cycle.​

"The wear mechanism of brake pads differs fundamentally between traditional fuel-powered vehicles and new energy vehicles," said Wang Hao, a senior engineer at the National Automobile Parts Quality Supervision and Inspection Center, in an interview. Fuel-powered vehicles mainly rely on mechanical braking for deceleration, resulting in high friction frequency between brake pads and discs. Under normal urban road conditions, their brake pad replacement cycle typically ranges from 30,000 to 50,000 kilometers. However, new energy vehicles (especially battery electric vehicles) are equipped with regenerative braking systems, which can meet over 70% of deceleration needs through motor reverse dragging, significantly reducing the frequency of mechanical braking use. For some new energy vehicle models, the brake pad replacement cycle can be extended to 60,000 to 80,000 kilometers. He gave an example: "We conducted a follow-up survey on 1,000 new energy vehicles in Beijing and Shanghai, and found that car owners who frequently use the high-level regenerative braking mode have brake pads with an average service life 23,000 kilometers longer than those who do not use this function."​

Driving habits and road conditions are even more crucial variables that break the "fixed cycle." In mountainous cities such as Chongqing and Guiyang, frequent uphill and downhill driving requires repeated braking, making the wear rate of brake pads over 40% faster than that in plain cities. "Last year, a car owner in Chongqing had a fuel-powered vehicle that had only been driven 20,000 kilometers, but the brake pads were already worn down to the warning line," recalled Li Ming, after-sales director of an automotive 4S shop. Disassembly revealed severe scratches on the brake pad surface: "The owner commutes 10 kilometers on winding mountain roads every day, and the number of sudden brakes is three times that of ordinary car owners. In such cases, the '30,000-kilometer' standard is completely inapplicable." On the contrary, during long-distance driving mainly on highways, constant-speed driving reduces the frequency of braking, and the brake pads of some fuel-powered vehicles can even last more than 60,000 kilometers.​

So, how can car owners independently judge whether brake pads need replacement? Industry experts have summarized a four-step method: "observe, listen, feel, and measure." "Observe" refers to checking the thickness of brake pads-most vehicle models have wear limit marks on the outer side of brake pads; when the thickness of the friction material is less than 3 millimeters (about 1/3 the thickness of a coin), immediate replacement is necessary. For some vehicle models, the tires need to be removed for inspection, and it is recommended to conduct such checks every 20,000 kilometers. "Listen" means paying attention to abnormal noises-if there is a "squeaking" or "screeching" metal friction sound during braking, it may indicate that the brake pads have worn down to the backing plate, requiring emergency maintenance. "Feel" focuses on the brake pedal feel-if the pedal travel becomes longer, feels soft when pressed, or if there is obvious jitter during braking or a decrease in braking force, it is likely that the brake pads are unevenly worn or aged. "Measure" involves using professional tools; some maintenance facilities use thickness gauges to detect the wear amount of brake pads, providing more accurate data.​

Notably, intelligent monitoring technology is providing a new solution for brake pad replacement. Many new vehicle models launched in 2025 are equipped with brake pad wear sensors, which collect real-time data on the thickness of friction materials, display the remaining service life on the instrument panel, and trigger an alarm when the thickness falls below the safety threshold. "This technology can avoid errors caused by car owners' 'subjective judgment' and also reduce the frequency of manual inspections," a technical director of an automaker revealed. In the next 2 to 3 years, intelligent brake pad monitoring systems will spread from high-end vehicle models to mainstream models priced between 100,000 and 150,000 yuan, with a coverage rate expected to exceed 50%.