What Causes the Abnormal Noise When Starting with Auto Hold?

[OMarley]

There are two main reasons for abnormal noise during startup: one is related to the braking system, and the other is due to chassis issues. Below are the detailed explanations: Braking System: In southern regions, where the climate is humid and rainy during spring and autumn, prolonged driving in such conditions can cause the brake discs to gradually rust. Vehicles with waterlogged chassis are particularly prone to brake disc 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 noise. Chassis Issues: This is one of the most common fault phenomena. Many cars 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 store or a professional repair shop for chassis maintenance and inspection to check for issues such as loose bearings, aging, or oil leaks, and replace the corresponding parts as needed.

[StMalachi]

I've also encountered the issue of abnormal noises when starting with auto hold before. At first, I thought it was normal and didn't pay much attention, but later realized there could be several underlying problems. The most common cause is brake system issues, such as excessively worn brake pads or rust accumulation on the brake discs, which can create squeaking sounds when the system releases the brakes. Another possibility is faulty electronic components like sensors or motors, leading to imprecise control and generating noise. Additionally, loose chassis or suspension parts can also cause abnormal noises, especially during the initial moments of acceleration when force is applied. I recommend regularly inspecting the brake system and giving the brake discs a simple wipe every month. If the noise persists for more than a week or two, it's best to visit a 4S shop or professional repair shop. Remember, ignoring it might not only increase fuel consumption but also pose safety risks. Safe driving starts with paying attention to these small details.

[SanAriana]

From a technician's perspective, abnormal noises during automatic parking startup are mostly related to mechanical friction or electronic control. Brake pads and calipers are the primary inspection points, as wear or dust accumulation can increase friction sounds; electronic modules like the parking brake motor may produce humming or clicking noises during startup if lacking lubrication or aging; loose suspension bushings are also prone to creaking sounds when under load. During diagnosis, you can first listen to the location of the noise: front-end noises often indicate brake issues, while sounds from under the car may suggest loose chassis components. It's recommended to use professional equipment to scan for error codes and avoid disassembling parts randomly to prevent worsening the issue. Based on experience, 20% of cases are normal break-in noises, but if frequent noises are accompanied by vibrations, it indicates potential risks. Safety first—timely inspection and repair are the most reliable approach.

[ReeseAnn]

As a car enthusiast, I often pay attention to abnormal noises. Squeaking sounds when starting with the auto hold engaged are quite common. During the break-in period of a new car, minor noises for a month or so are normal, but in older cars, it could be due to aging components. Simply put, reasons might include brake pads picking up debris or misaligned tires, causing increased friction when the system releases, resulting in noise. For daily prevention, try lightly pressing the brakes a few times before starting to clear dust. If the noise gets progressively louder, be wary of potential chassis wear issues. Don't let it affect your driving pleasure—after all, the confidence to drive safely comes from regular maintenance. In most cases, a dealership can quickly resolve it without costing much.

[McVincent]

From a safety perspective, startup abnormal noises should not be ignored as they often indicate underlying faults. Abnormal friction in the braking system may lead to reduced braking force, increasing the risk of rear-end collisions; loose suspension or chassis components can affect handling stability, especially during high-speed turns. Common causes include parking module failure or component fatigue. It is recommended to pull over for a preliminary inspection upon hearing any abnormal noise, checking for scratches on brake discs or loose body components. Regular maintenance such as brake pad replacement can prevent these issues—don't wait until the noise worsens. Sharing my friend's experience: he nearly had an accident due to minor abnormal noises, so timely action is crucial for peace of mind and cost savings.

[KaydenAnn]

The principle of automatic parking is that the brake system automatically releases. If there is a clicking or squeaking sound during startup, it mostly originates from mechanical parts. Imbalance in brake caliper tension or lack of lubrication in the motor are common causes, and aging suspension bushings can also produce noise under stress. During inspection, pay attention to whether the sound occurs at specific temperatures or speeds, as high temperatures can exacerbate friction. Maintenance advice suggests simple monthly lubrication of movable parts to mitigate the issue. From a system perspective, although such noises are minor, they can indicate long-term problems such as brake degradation, so don’t overlook them. Learn some car maintenance knowledge from unusual sounds every time you drive.