What is the plastic panel under the bumper called?

2 Answers
MacLukas
07/24/25 4:29am
The plastic panel under the bumper is called a deflector. Function of the deflector: The deflector is usually fixed with screws or clips and can be removed by oneself. The main function of the deflector is to reduce the resistance generated during high-speed driving. The deflector is a downward-sloping connecting panel installed below the front bumper, integrated with the front skirt of the car body. This design helps to lower the air pressure under the car and reduces risks during driving, also preventing rear-wheel drift. If the deflector is missing, the difference in air pressure above and below the car at high speeds can create an upward lifting force, which not only increases fuel consumption but also affects the car's driving safety. Plastic shield above car wheels: The curved shield above the car tires is called a mudguard. Function of the mudguard: The main function of the mudguard is to prevent mud from splashing onto the car body or people, keeping them clean. It also prevents mud from splashing onto tie rods and ball joints, which could cause premature rusting. Another function is to protect the car's exterior paint from damage caused by road mud. Mudguards are typically made of high-quality rubber or engineering plastic. Plastic shield under the front chassis: The plastic shield under the front chassis protects the engine and is called a chassis guard. The chassis guard protects engine components and various pipelines, preventing damage from friction with the ground under rough road conditions. It also improves airflow under the car, reducing wind resistance and noise, thereby enhancing fuel economy and overall vibration and noise performance.
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Charlie
08/11/25 12:03am
The plastic panel under the bumper is commonly called the lower guard plate, also referred to as a front lip or spoiler. Having driven for over a decade, I find this panel particularly important. Though it may seem inconspicuous, its practical functions are significant. When driving on gravel roads, it protects the engine oil pan from damage. At high speeds, it reduces undercarriage turbulence, making the car more stable. Last week, I accidentally scraped a curb while reversing, and this panel took the hit first, leaving only a few scratches. Without it, the bumper would have cracked. Replacing it costs around 200-300 RMB for an average car, and DIY installation isn't difficult—just remove a few screws. When washing the car, avoid blasting high-pressure water directly into the gaps, as it can loosen the clips.
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