What Causes the Clicking Noise When Starting with Auto Hold?
2 Answers
There are two main reasons for the noise when starting: 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 the climate is humid and rainy during spring and autumn, the brake discs can gradually rust if the vehicle is driven in such conditions for a long time. This is especially true for vehicles that have had their chassis submerged in water, as the brake discs are more prone to oxidation and rust. To resolve this, simply ask a mechanic to sand off the rust from the brake discs during maintenance, and the noise will disappear. 2. Chassis Issues: This is one of the most common problems. Many vehicles develop suspension wear after a certain period of use. Over time, some supporting components in the suspension may fail, causing the chassis to produce noise when starting. It is advisable to visit a 4S shop or a professional repair shop for chassis maintenance and inspection to check for issues like loose or worn bearings, oil leaks, etc. The corresponding parts should be replaced promptly if necessary.
From my years of experience in car repair, the clicking noise when starting with auto-hold engaged is quite common. It's mainly likely a brake system issue, such as slight adhesion between the brake pads and rotors, especially after humid weather, which can cause a clicking sound at the moment of starting. Another reason could be wear in drivetrain components - if parts like CV joints or universal joints are aged and loose, they may also produce noise under heavy starting load. The electronic parking system is also worth checking - for instance, dust accumulation in motors or sensors can cause rough operation, which can usually be fixed with cleaning and lubrication. Don't neglect routine maintenance; regular checks of tires and brakes, plus keeping brake rotors clean can prevent these noises. I recommend getting it inspected at a repair shop as soon as possible - safety comes first.
