What Causes Abnormal Noise When Starting the Car and Braking?

2 Answers
MacLillian
07/28/25 11:28pm
The reasons for abnormal noise when starting the car and braking are: 1. Brake run-in; 2. Normal activation of the ABS system; 3. Metal hard spots on the brake pads; 4. Severe wear of the brake disc; 5. Improper installation of the brake pads; 6. Sharp noise when braking in reverse; 7. Small stones or a water film between the brake disc and pads; 8. Foreign objects in the braking system; 9. Severe wear of the brake pads. The function of the brake is to reduce speed or stop the vehicle. Its working principle is: by using the friction between the brake pads and the brake drum, as well as between the tires and the ground, the kinetic energy of the moving vehicle is converted into heat energy after friction, thereby slowing down or stopping the car.
Was this review help?
15
4
Share
ChristopherAnn
08/12/25 3:51am
My experience tells me that when there is abnormal noise from the brakes during car startup, it is mainly due to rust or dust accumulation on the brake discs or pads. Especially after rainy days, if the car is parked for a while, an oxidation layer forms on the surface of the brake discs, causing a squeaking sound when you first apply the brakes, which can sound quite alarming. This situation is most common in humid weather, and if the noise disappears after driving for a short while, there’s no need to worry. Another possibility is that the brake pads are worn too thin, causing the metal backing to grind against the brake disc, producing a sharp noise. Over time, this can lead to deformation of the disc and pads. I’ve encountered this a few times while driving. First, check the remaining thickness of the brake pads and try cleaning off the rust or dust with compressed air. If the problem persists, don’t delay—take it to a repair shop immediately to check if the calipers are sticking, to avoid serious safety risks. These minor issues may seem simple, but ignoring them could lead to brake failure, especially during high-speed driving. Regularly washing your car to keep the brake system clean can help reduce this risk.
Was this review help?
5
2
Share
Expand All
More Forum Discussions

What should be paid attention to when changing car tires?

Precautions for changing car tires are as follows: 1. Choose the appropriate tires. The specifications of the tires should be the same as the previous ones and must match the other tire on the same axle, such as speed rating, load index, tread pattern, brand, size, etc., which is beneficial for safe driving. 2. The valve stem should also be replaced. This is because when you change the tires, the aging cycles of the new tires and the valve stems are different. During the new tire cycle, the valve stem may develop issues, which are not easily noticeable. Therefore, it is best to replace the valve stem at the same time as the tires. 3. Installation direction and inflation. If using the original factory tires, install them according to the manufacturer's requirements. If using non-original tires, generally the side with the production date should face outward. If they are directional tires, ensure that the arrow on the wheel aligns with the direction of the car's forward motion. When inflating, you can inflate to the maximum pressure allowed by the tire and then reduce it to the standard pressure specified by the manufacturer. 4. It is best to install new tires on the rear axle of the vehicle. If more worn tires are placed on the rear axle, it will reduce the rear wheels' drainage capacity, thereby increasing the risk of driving in rainy conditions. Therefore, if only two new tires are installed, they should be mounted on the rear wheels.
15
1
Share

Where to Stick the ETC Device?

The ETC device is generally installed on the upper middle part of the front windshield, while for large vehicles like trucks and buses, it is installed on the lower middle part. The suitable installation position should be no lower than 1.2 meters and no higher than 2.5 meters, with an installation angle between 30 to 90 degrees. For vehicles with anti-explosion film or those that have it installed later, which may affect the signal transmission of the microwave communication link, the device should be installed on the microwave skylight strip. ETC stands for Electronic-Toll-Collection, meaning electronic toll collection system. To apply for ETC, you need to provide the original and photocopy of the vehicle owner's valid ID card and driving license. If the application is not made by the owner, the agent's valid ID card is also required. The photocopy of the driving license should include the page with the most recent annual inspection stamp. A bank card for deducting highway tolls is also needed, and the vehicle must be registered under the name of an individual aged between 18 and 60. For company vehicles, the required documents include: An introduction letter from the vehicle owner (with official seal); photocopy of the organization code certificate or business license (with official seal); original ID card of the agent; original driving license of the vehicle; and the vehicle that needs to apply for ETC. Here are some precautions for installing ETC: Do not block the view; it's best to install it behind the rearview mirror: Many car models have a large tilt angle on the windshield, which reduces the driver's field of vision. If this is not considered during ETC installation, it may increase the driver's blind spot. Installing it behind the rearview mirror on the right side can avoid blocking the view. Do not affect charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back for self-charging. Therefore, during installation, avoid the black areas on the windshield and positions that may block the solar panel. Once installed, do not remove it casually: The button in the middle of the adhesive is an anti-removal rod connected to a switch. After installation, the windshield will press the anti-removal rod in. If removed casually, the rod will pop out and trigger the switch, locking the electronic tag and making it unusable. You will then need to go to an ETC service point to unlock it. This is designed to prevent multiple vehicles from sharing one device. When using ETC, note that: The ETC transaction sensing range is 8 meters. To prevent the ETC device of the vehicle in front from malfunctioning, keep a distance of more than 10 meters from the vehicle in front to avoid automatic toll deduction for the front vehicle. The recognition speed for ETC lanes is 20 kilometers per hour. Driving too fast may fail to read the vehicle's device information, leading to toll deduction failure. When using a debit card bound to ETC, insufficient balance may also cause toll deduction failure.
2
0
Share

What is the Best Insurance to Buy for a Car?

There is no 'best' car insurance, only the most suitable one. Among them, the compulsory traffic insurance for vehicles, officially known as 'Compulsory Traffic Accident Liability Insurance for Motor Vehicles,' is China's first mandatory insurance system implemented by national law. Compulsory traffic insurance is a type of insurance that the state mandates car owners to purchase. If you drive without this insurance and are caught, you will face penalties. In addition to this, it is advisable to purchase sufficient third-party liability insurance: among all car insurance types, third-party liability is the most important. After all, if your car is damaged, you can choose not to drive it, but compensation for others cannot be waived. When buying car insurance, the priority should be maintaining the ability to compensate for others' losses. Apart from these, other car insurance types can be chosen based on personal needs, such as: Vehicle Damage Insurance: After the car insurance reform, previously additional insurances like engine water damage insurance, standalone glass breakage insurance, no-deductible insurance, spontaneous combustion insurance, and third-party special agreement insurance have all been merged into vehicle damage insurance. If the insured or other permitted drivers cause an accident resulting in damage to the insured vehicle, the insurance company will bear the claim liability within reasonable limits, reducing the financial loss caused by vehicle damage. Seat Insurance and Driving Accident Insurance: Seat insurance follows the car, meaning no matter who sits in your car, compensation is paid per seat in case of an accident. Therefore, regardless of the vehicle type, purchasing car insurance is not only a responsibility to the owner but also to others. In the context of frequent traffic accidents, having car insurance is particularly important and should not be taken lightly. However, car insurance is only a subsequent safeguard; safe driving is fundamental. Non-Medical Insurance Liability Insurance: After purchasing this insurance, even the self-paid medicines during the other party's hospitalization can be reimbursed. Otherwise, the insurance only covers reasonable expenses within the hospitalization scope, and those outside the medical insurance catalog are not covered, leaving the car owner to pay out of pocket.
19
5
Share

Can the seats be heated?

Seats can be heated. The details are as follows: 1. It can be installed additionally. Buy a USB-connected seat heating pad and place it under the seat cover, then plug it into the cigarette lighter to USB adapter. 2. The seat heating function uses electric heating wires inside the seat to heat the interior and transfers the heat to the occupant through thermal conduction, improving the discomfort caused by the low temperature of the seat after prolonged parking in winter. 3. The heat of the seat comes from a heating system installed inside the seat that generates heat, which is essentially a heating panel installed, and the heat is dissipated through the electric heating wires of the heating panel, similar to an electric blanket.
4
1
Share

How to Set Up the Fista Smart Trunk?

Fista's smart trunk can be activated by carrying the car key near the trunk for about 5 seconds after the car has been locked for 15 seconds, and the trunk will open automatically. The smart trunk is equipped with a sensor underneath that allows it to open or close via sensing. Here are some details about the smart trunk: 1. The sensor in the smart trunk is a device that receives signals or stimuli and responds, converting the measured physical or chemical quantity into another corresponding output. 2. The design purpose of the smart trunk is to allow the trunk to be opened without manually pressing a button when carrying items.
3
5
Share

How to Check Which National Emission Standard Your Vehicle Meets

Methods and steps to check your vehicle's emission standard: 1. The simplest and most direct way is to look at the vehicle's environmental protection label, which has clear markings on the back. Just examine it carefully to find the information. 2. You can visit professional query websites for reliable results. 3. For new vehicles, you can check the vehicle's factory certificate, where the information can be found. However, the original certificate is usually kept at the vehicle management office, so it's recommended to make a copy when purchasing a new car for future reference. 4. You can also personally visit the environmental protection window at the vehicle management office with your vehicle's registration certificate, where the staff will assist you in checking the information.
2
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.