What Causes the Abnormal Noise When Starting with Auto Hold?

[MacJaxon]

There are two main reasons for the abnormal noise during startup: one is related to the braking system, and the other is due to chassis issues. Here are the detailed explanations: 1. Braking System: In southern regions, where spring and autumn seasons are humid and rainy, prolonged driving in such conditions can cause the brake discs to gradually rust. This is especially true for vehicles whose chassis have been submerged in water, as their brake discs are more prone to oxidation and rust. In such cases, simply asking a mechanic to remove the rust from the brake discs with sandpaper during maintenance can eliminate the abnormal noise. 2. Chassis Issues: This is one of the most common faults. Many vehicles experience suspension aging after a certain period of use. At this point, some supporting components in the suspension gradually fail, causing the chassis to produce abnormal noises during startup. It is advisable to promptly visit a 4S shop or a professional repair shop for chassis maintenance and inspection to check for issues such as loose bearings, aging, or oil leakage, and to replace the corresponding parts as needed.