What is a rear fender
The rear fender (also known as the rear fender) is an important component of the vehicle's side, located on both sides of the rear door, extending from the roof to the rear of the vehicle, right above the rear tire, presenting a semi-circular structure.
Function and Role
Youdaoplaceholder0 Reduce wind resistance : Optimize aerodynamic performance, reduce driving resistance, and enhance fuel economy and stability.
Youdaoplaceholder0 Protect the chassis : Block sand, mud, water and other debris lifted by the wheels, reduce the risk of chassis damage and extend the vehicle's service life.
Youdaoplaceholder0 Enhance aesthetics : Smooth line design can enhance the overall aesthetic appearance of the vehicle body.
The rear fender usually precisely matches the curvature according to the tire model to ensure a safe distance from the wheel's movement trajectory and prevent collisions during driving.
The rear door fender is an important component at the rear of a vehicle and mainly serves the following functions:
Reduce wind resistance
By optimizing the aerodynamic design, the air resistance during vehicle operation is reduced, improving fuel economy and driving stability. The rear door fenders usually adopt an arched arc design to further reduce wind resistanc. .
Protect the chassis
Shield the sand, gravel, mud and water and other debris lifted by the wheels from directly splashing onto the chassis, reduce the risk of chassis damage and extend the vehicle's service life.
Enhance the aesthetic appeal of the vehicle body
Smooth line design can enhance the streamlined beauty of the vehicle's overall appearance and improve the visual effect.
Fixed method
It is usually connected to the vehicle body through accessories such as clips and expansion screws, which not only facilitates disassembly and maintenance but also can adapt to thermal expansion and contraction, maintaining sealing performance.
The malfunction of the rear fender may involve damage to the vehicle body components or mechanical system issues. It is necessary to make a judgment based on the specific circumstances:
Treatment of damage to vehicle body components
If deformation is caused by impact, the repair method depends on the degree of damage:
Youdaoplaceholder0 Slight deformation : Usually, scarless repair is adopted, and the original state is restored by stretching and tapping with tools
Youdaoplaceholder0 Severe deformation : Sheet metal repair is required. After disassembly, shape and weld. Replace with new parts if necessary
When cannot be repaired : the damaged part needs to be cut, but it will affect the vehicle's appearance and residual value. The pros and cons need to be weighed
Troubleshooting of mechanical system faults
If it is an air conditioning system fender:
Youdaoplaceholder0 motor fault : A broken power cord or an oxidized plug may cause the motor to fail to drive
Youdaoplaceholder0 Control system issues : Damage to the control board or malfunction of the sensor can cause abnormal command
Youdaoplaceholder0 Mechanical jamming : Dust or foreign objects jamming components. Cleaning and lubrication are required
Impact on safety performance
Severe deformation or fracture may affect the opening and closing of car doors and the balance of the vehicle. It is necessary to repair it in time to avoid potential safety hazards.
Criteria for judging the maintenance of rear fenders
Youdaoplaceholder0 Degree of injury assessment
Youdaoplaceholder0 Minor dents/small pits : If the paint surface is intact and does not affect the structure, maintenance can be temporarily omitted . Scarless repair (such as suction cups, foam filling) is a preferred option to preserve the original factory paint .
Youdaoplaceholder0 Paint surface damage or deep pits : must be repaired; otherwise, it is easy to cause rust to spread, affecting the strength and appearance of the vehicle body .
Youdaoplaceholder0 Severe deformation/crack : Sheet metal repair or cutting replacement is required, especially the rear fender which is integrally formed with the body and needs professional treatment .
Youdaoplaceholder0 security and performance impact
Check whether the gap with the car door and the body is uniform (normally about 3mm). Abnormalities may indicate deformation .
If the suspension interlocking components (such as dust covers) are damaged, it may also affect the stability of the fender .
Youdaoplaceholder0 repair mode select
Youdaoplaceholder0 priority repair : Sheet metal shaping and welding can restore the original state, avoiding the negative impact of cutting on the residual value .
Youdaoplaceholder0 must be replaced :
Irreparable tear or structural damage ;
The screw holes are severely deformed or rusted (except for plastic parts) .
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