What Causes the Clicking Noise When a Car Starts?

[Stella]

The causes of clicking noise when a car starts are as follows: 1. Noise caused by rusted brake discs/pads: The brake disc and brake pad stick together due to rust, causing noise. This usually occurs after driving in rainy weather or prolonged parking. When the brake disc and brake pad rust and stick together, noise will occur upon restarting the car. This issue can be resolved by applying butter or special lubricating oil to the connection between the brake pad and brake caliper. 2. Excessive wear of brake disc and brake pad: Both brake discs and brake pads are high-wear items. Each time the brakes are applied, these two components rub against each other, leading to natural wear over time. When the wear becomes excessive, noise will naturally occur, so regular inspection and replacement are necessary. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs should be replaced every 100,000 to 120,000 kilometers.