What Causes the Clicking Sound When Braking at Low Speeds?
3 Answers
Low-speed braking noise is a normal activation of ABS. The working process of ABS is essentially a cyclic process of locking and releasing, keeping the vehicle in a state of near-lock rolling. Therefore, when ABS is triggered by hard braking, it produces a clicking sound, which is normal. In such cases, simply press the brake pedal firmly to the floor. For automatic transmission vehicles, the clicking sound when braking may primarily be due to the electronic linkage between the braking system and the automatic transmission. Specific reasons include: Excessive wear of brake discs and pads: Both brake discs and pads are high-wear components, subjected to friction with each brake application. Over time, wear occurs naturally, and when excessive, it can lead to abnormal noises. Regular inspection and replacement are essential. Typically, brake pads should be replaced every 60,000-80,000 kilometers, while brake discs last about 100,000-120,000 kilometers. Improper installation of brake pads: If brake pads are installed incorrectly or mismatched in type, abnormal noises may occur. Reinstallation may be necessary. It is advisable to have brake pads installed at professional auto repair shops, especially for owners who have had them replaced at roadside stalls. Other possible causes: Faults in the caliper, brake disc, or brake pads can also produce such noises. If the noise persists, first check for dragging brakes. Poor caliper reset can cause prolonged friction between the disc and pad, leading to abnormal noises under certain conditions. Additionally, foreign objects on the brake pads or discs can also cause noise.
I recently experienced the same strange noise while driving my old car. When braking at low speeds, there was a clunking sound, almost like the chassis was drumming. I asked the mechanic at my regular repair shop, and he said it's usually a brake system issue—like brake pads worn too thin and not making even contact with the rotors, or rust and small stones stuck between the pads and rotors, causing noise when braking. Loose suspension components like tie rods can also cause similar sounds. This isn't a minor issue—a friend of mine ignored it once, and his tires started wearing out faster. I suggest getting it checked early to avoid potential brake failure at high speeds, which could be dangerous. Always listen for unusual noises before driving, and keeping the brakes clean can help prevent this issue. At least once a month, get your wheels sprayed clean at a car wash.
Having driven for over a decade, I've encountered countless instances of low-speed braking accompanied by clunking sounds. Common causes include scratched or uneven brake discs, often resulting from frequent hard braking, or stuck pistons in the brake calipers that produce such noises when movement is restricted. Another possibility is damaged wheel hub bearings, which can cause continuous clunking at low speeds. Don't take it lightly—address it early. I learned this the hard way when delaying repairs led to replacing the entire braking system at extra cost. During routine maintenance, check brake pad thickness; replace them if they're under 5mm. Parking on level ground can reduce suspension deformation. Safe driving isn't about luck—regular visits to the shop for quick inspections save hassle in the long run.
