Left side air curtain decorative panel of the car - Function of the rear bumper
The air curtain trim panel on the left side of the car and the rear bumper have different focuses: the air curtain trim panel mainly deals with aerodynamics and heat dissipation, while the rear bumper mainly focuses on safety and protection.
The left air curtain trim panel: Located below or on the side of the bumper, its core function is to guide the airflow, reduce the turbulence and drag near the wheels, and enhance high-speed stability; for some models, the air curtain structure can also guide the airflow into the cooling system to help dissipate heat, and also has a visual decorative effect.
The rear bumper: Mainly responsible for absorbing and buffering impact forces during low-speed collisions, protecting the rear body of the vehicle and pedestrians, and also having the effect of decorating the overall appearance; some rear bumpers with ventilation ports on both sides can also discharge the chaotic airflow in the rear fender, improving driving stability.
In simple terms, the air curtain trim panel is more about "aerodynamics + heat dissipation", while the rear bumper is more about "safety protection + decoration", and both have certain aesthetic functions. If this trim panel is just scratched and damaged, it does not affect safety, but it will have a slight impact on drag and stability at high speeds. It is recommended to replace it in time.
The "left air curtain trim panel - rear bumper" fault is mainly that the trim panel on the left side of the rear bumper (also called the side skirt or aerodynamic trim panel) is loose, detached or damaged. This panel is mostly made of ABS plastic, mainly serving for aesthetics and guiding the airflow. Minor cracks are common; for severe damage, it needs to be replaced. First, determine how to handle it:
Check the damage degree: First, check if the panel is cracked, if the fasteners are broken, and if the screws are loose. Only if they are slightly loose or the fasteners are broken, they can be reinstalled; if the panel is cracked but not broken, it can be repaired by bonding; if it is severely damaged or deformed, it is recommended to replace it directly.
Can be repaired: Minor cracks can be fixed using a plastic welding gun from the back or with trichloromethane. Before the operation, clean the surface and align the position.
It should be replaced: If the panel is severely deformed, broken, or the fasteners are all broken, it is directly replaced, and pay attention to buying the original factory or brand parts that match the model.
If you want to do it yourself, you can operate as follows:
First, clean the installation area, wipe it clean with alcohol wipes and keep it dry.
Check the fixing points and screws; if they are loose, tighten them; if they are broken, replace them, but do not tighten them too much, as it may deform the panel.
If only part of the fasteners are broken, you can use glass glue for bonding and fix it with transparent tape until it dries; if all the fasteners are broken, replace the fasteners directly.
When installing, align the holes, press the fasteners in place, and finally check if the edge gaps are uniform.
Regarding costs and insurance claims:
If it is only an appearance defect that does not affect safety and driving, and the repair cost is not high, it is not recommended to claim insurance, as it may affect the discount for the next year's insurance; if the damage is severe, involving the main body of the bumper or other components, you can claim insurance, but ask about the claim rules first.
If the rear bumper itself is also cracked or the fasteners are extensively broken, it may not be stable if repaired by yourself. It is recommended to handle it at a formal repair shop or 4S store, and also check if there are other damaged components inside.
The left air curtain trim panel of the rear bumper is broken; first determine the degree of damage and decide whether to repair or replace: If it is only a small crack or chipped paint, it can be repaired; if the damage is severe, it should be replaced directly.
Repair or replacement
Can be repaired: If the crack is not long, not broken, and the fasteners are not broken, it can be fixed using plastic welding or putty and paint; the cost is several hundred yuan, and the car can be taken back in one or two days.
It is recommended to replace: If it is in a spider-web pattern, the support is broken, or the trim panel has already cracked and deformed. This repair will not be strong enough, and it may be scrapped in the next collision, and the original factory parts have better toughness and safety.
Claim insurance: If it is caused by an accident, claim the damage first, and if the other party is fully responsible, you can claim full compensation from the other party's insurance; If it's your own fault and you choose to repair the minor damage yourself at your own expense, it might be more cost-effective than increasing your insurance premium.
The newly replaced plastic parts are all bare and need to be repainted. There will be some color differences compared to the original paint, which is a normal phenomenon.
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