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What Causes the Brake Noise in a Bora When Cold?

2 Answers

SanMackenzie

08/29/25 3:29am

There may be several reasons for brake noise in a Bora when cold: 1. Running-in of a new car, where the brake pads' running-in is a crucial part. Typically, after driving a few hundred kilometers, the braking will feel more comfortable; 2. Newly replaced brake pads also need to go through a running-in period to better integrate with the old disc. Initially, the brake pads may feel very hard, and it usually takes a few hundred kilometers of driving before they feel better; 3. While driving, very small sand particles might get between the pads and the disc, sometimes causing noise due to friction. This usually doesn't require repair, as driving for a while can help the small particles fall out; 4. For cars that produce noise due to incomplete running-in, some owners might resort to slamming the brakes while driving to quickly run-in the brakes. However, this can cause more severe wear on the brake pads, effectively reducing their lifespan. Therefore, it's recommended to drive for a while longer and observe the situation, avoiding artificially forcing the wear of the brake pads; 5. Missing or damaged fixing screws of the brake disc can also cause brake noise; 6. A malfunction in the brake system, which requires inspection and repair.

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LucilleRose

09/10/25 8:09am

Cold-start brake squeaking is quite common, and I've encountered many similar cases. Most often, it's caused by metal particles mixed in the brake pad material hardening in cold weather and creating high-frequency friction against the rotor. Another frequent cause is surface rust on brake rotors after rain, which produces temporary noise during initial morning driving. Additionally, severely worn brake pads will emit warning sounds indicating replacement is due. I recommend having technicians measure pad thickness during each maintenance - replace if below 3mm. For occasional mild noise, pumping the brakes several times after warming up usually helps. However, if accompanied by soft pedal feel or steering wheel vibration, visit a professional shop immediately as it may indicate warped rotors or caliper issues. Safety first - never ignore such symptoms.

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