What is the lower part of the rear bumper of a car
The plastic component beneath the rear bumper of a car is usually called a spoiler (also known as a front spoiler), which mainly serves to optimize aerodynamics, enhance driving stability and improve aesthetics.
Function and Role
The deflector is usually installed under the bumper. By guiding the airflow direction, it reduces the air pressure under the vehicle and suppresses the rear wheel floating phenomenon when the vehicle is traveling at high speed, thereby enhancing driving stability. Meanwhile, its downward-sloping design can reduce air resistance and optimize fuel economy.
Protection and Safety
The deflector can absorb part of the impact force in minor collisions, reducing damage to the vehicle body. The deflector plates of some models are also made of flexible materials, which can reduce the harm to pedestrians in case of collision.
Appearance and Structure
This component is usually made of plastic and is fixed below the bumper with screws or clips. It has smooth lines and is in harmony with the overall shape of the vehicle body, combining practicality and aesthetics.
The main functions of the lower part of the rear bumper of a car include
Aerodynamic optimization
Through the design of the deflector plate (the downward-inclined connecting plate), the airflow is guided to pass through the underside of the vehicle in an orderly manner, reducing the lift force during high-speed driving, lowering the underside air pressure, thereby enhancing driving stability and optimizing aerodynamic performance.
Protective effect
As a bottom protection device of the vehicle body, it can reduce the damage to the bottom of the vehicle caused by collisions or scratches, and at the same time provide certain protection for pedestrians.
Appearance beautification
The smooth lines blend seamlessly with the body shape, enhancing the vehicle's dynamic and fashionable feel.
The main manifestations of faults in the lower part of the rear bumper of a car are problems such as paint peeling, indentation and component detachment. The specific causes need to be determined based on the actual situation. The following are common types of faults and their solutions:
The problem of paint peeling
It may be caused by defects in the production spray painting process or external stone impacts. Small areas of peeling paint can be treated by repainting, and the cost is usually several hundred yuan. If there is a large area of paint peeling, it needs to be repainted, and the cost may reach several thousand yuan.
Dent repair
Minor depressions can be treated through professional repair techniques, and the cost is relatively low. The bumper is severely dented and needs to be replaced. The replacement cost at a 4S store may reach several thousand yuan.
Component damage
If the fixed buckle of the lower part of the bumper breaks or the buffer foam and energy-absorbing box deform, it may cause the bumper to fall. The buckle needs to be replaced and reinstalled to avoid the risk of detachment.
It is recommended to choose a professional maintenance point for inspection based on the severity of the fault to ensure driving safety first.
When the lower part of the rear bumper of a car is damaged, the repair or replacement plan should be selected based on the degree of damage:
Repair plan for minor damage
If only small-scale cracks or paint peeling occur, they can be repaired through the following steps:
Youdaoplaceholder0 Sanding treatment : Use 180-grit sandpaper to sand the damaged area and remove the surrounding paint layer.
Youdaoplaceholder0 Clean the surface : Use a dedicated cleaning agent to remove dirt and impurities.
Youdaoplaceholder0 Filling and repair : Cut a suitable stainless steel repair mesh to fill the gap, apply putty to fix it, and finally spray paint (it is recommended to have it done by a professional 4S store to avoid color differences).
Replacement suggestions for severe damage
If the crack penetrates the entire component or is accompanied by plastic fragments, the entire bumper lower guard plate needs to be replaced.
Youdaoplaceholder0 Check accessories : Contact the car manufacturer to obtain the correct part number to ensure it matches the vehicle model.
Youdaoplaceholder0 Disassembly and installation : Use a screwdriver to remove the old components, fix the new guard plate in its original position and tighten the bolts.
Youdaoplaceholder0 Rust prevention treatment : reapply primer if necessary to prevent rusting.
Safety Tips
The lower guard plate of the bumper has both decorative and cushioning functions. Severe damage will reduce the protective ability in low-speed collisions. In case of traffic accidents or extensive damage, it is recommended to replace it immediately to ensure driving safety.
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