What Causes the Abnormal Noise When Braking on Snowy Days?
2 Answers
On snowy days, the abnormal noise when braking is caused by the ABS (Anti-lock Braking System) being activated. When you fully press the brake on snowy days, the ABS activation producing noise is a normal phenomenon. The activation of ABS prevents vehicle skidding caused by sudden wheel lock-up, so it is advisable to keep the speed below 30 km/h when driving in snowy conditions to avoid rear-end collisions due to delayed braking. The Anti-lock Braking System, abbreviated as ABS, functions by automatically controlling the braking force during vehicle braking to prevent wheel lock-up, keeping the wheels in a state of rolling and sliding (with a slip ratio of about 20%), thereby ensuring maximum traction between the wheels and the road. Other reasons for abnormal braking noise: It may be due to rust or hard spots on the brake discs, which usually occur when the vehicle first starts moving and should improve after a few brake applications. Noise generated by the suspension system and pressure bearings. In cold and snowy weather, rubber components harden, and braking forces can cause noise from the rubber parts of the suspension system, which should improve after the vehicle warms up. It could be a fault in the brake caliper, such as sticking, leading to abnormal noise, which requires inspection and repair at a professional auto repair shop.
When driving in snowy conditions, I often hear a squeaking noise when applying the brakes. This is usually because the brake discs and pads are covered with ice and snow. In cold weather, melted snow can freeze on metal surfaces, and the friction from the ice layer creates noise when braking. Additionally, sand and road salt from snowy surfaces can get into the braking system, leading to uneven wear or rust on components, which may result in harsh sounds. Low temperatures also make metal more brittle and prone to contraction—if the brake pads are old or rusted, the increased gaps can cause more pronounced rattling. While this isn’t a major issue, long-term neglect could affect braking performance. I’ve had to pull over a few times to inspect it. To prevent this, I recommend driving slower in snowy conditions and regularly clearing snow and debris from the wheel hubs and surrounding areas. If the noise persists, have a professional inspect the brakes immediately—safety comes first. Switching to winter tires can also help reduce such issues, as driving in snow inherently carries higher risks.
