What Causes the Brake Noise in BMW 5 Series on Snowy Days?

[MakaylaLee]

Here are the specific reasons for the brake noise in BMW 5 Series on snowy days: 1. Improper Brake Pad Installation: When installing new brake pads, the old brake discs were not resurfaced, leading to improper fit. Improper installation or failing to resurface the old discs before installing new pads can cause the new pads to rub against the uneven surface of the old discs, resulting in uneven wear on the new brake pads. 2. Brake System Malfunction: There may be inherent defects in the brake system, causing the brake pads to only partially contact the brake discs. This increases the pressure per unit area on the brakes, leading to noise. It is recommended to check components such as the calipers and guide pins. 3. Presence of Foreign Objects: Foreign objects can cause misalignment of the contact surfaces, resulting in noise.

[HazelAnn]

I've been driving a BMW 5 Series for many years, and the brakes always make strange noises in snowy winter conditions, creaking and startling me. This is mainly because snow and ice accumulate in the gaps between the brake discs and calipers, especially since BMW's sport brake system is designed to be very compact. When snow and ice get in and freeze, they create friction noises when starting or braking. The low temperatures also make the brake pads harder, causing less smooth contact with the disc surface and making it easier to produce odd sounds. Generally, once the snow melts or the weather warms up, the noise disappears, so there's no need to worry too much. However, it's best to lightly press the brakes a few times to warm them up before driving, which can reduce sudden noises. Additionally, when washing the car, make sure to clean out snow debris from the wheel hubs to prevent long-term corrosion of components. In short, this is a common winter issue, not a major problem, but it does affect driving comfort, so it's important to be mindful.

[AliyahRose]

As a BMW owner, the annoying brake noise during snowy days is quite bothersome. I've noticed that it's mainly caused by ice and snow clogging the brake components. BMW's brake discs are prone to icing, especially after high-speed driving in snowy conditions and then parking in a cold environment. The friction from the formed ice layer generates noise. Another factor is that low temperatures cause the brake pad material to shrink and become brittle, resulting in uneven contact with the brake disc and producing squeaking sounds. The solution is simple: press the brakes a few times in place before driving to preheat and melt the ice and snow, or thoroughly rinse the wheel hub area during car washes to reduce residue. Regular checks on brake pad wear are also important. If the noise persists, it's necessary to get it inspected to avoid damaging the system. Whenever possible, park indoors to minimize exposure to snowy conditions, ensuring safer driving.

[LaLayla]

Common causes of brake noise in a BMW 5 Series during snowy conditions include ice and snow accumulation and component hardening due to low temperatures. When snow and ice enter and freeze within the brake calipers, the friction noise occurs as the ice layer cracks or melts during each braking action. BMW's high-performance brakes are particularly sensitive to this effect. It is recommended to check for snow buildup around the wheel hubs after parking and remove any residue. If the noise occurs frequently, there may be rust or wear issues requiring professional attention. In summary, being mindful of this issue during winter driving is key—prevention is better than cure.