What is the function of the camera cover on the rear bumper of a car?
The rear bumper camera cover (also known as a rainproof cover or protective shield for the reversing camera) is a physical protective accessory installed around the reversing camera lens. Its main functions are as follows:
Waterproof and anti-slip: It effectively prevents rain, mud, frost, and small splashes from directly contacting the lens surface, avoiding lens blurring that leads to unclear vision.
Improve image stability: In rainy, humid, or winter areas prone to frost, it can significantly reduce image distortion, whitening, or reflection caused by lens obstruction, ensuring the clarity of the reversing camera image.
Anti-scuffing and impact resistance: Some high-quality protective covers use wear-resistant materials (such as 9H diamond layer, composite functional materials), which can withstand scratches or impacts from stones, sand, and dust on the lens glass.
Does not affect vision and functions: The designed product does not block the camera view and does not affect infrared sensors, automatic parking, collision warning, and other camera-dependent driver assistance systems.
Easy maintenance: Most products use flexible silicone or TPU materials, which are easy to disassemble and clean with a damp cloth.
Note: Whether to install a protective cover depends on the usage environment. If you often drive in heavy rain, high-altitude areas, sandstorms, or gravel roads, installing a protective cover can significantly enhance safety; if you mainly commute in urban areas, the original factory lens already has certain protective capabilities, so the necessity is lower.
Installing a camera on the rear bumper requires both mechanical installation and wiring layout operations. According to the latest public information (as of April 2026), the following is the standard installation process:
Preparation before installation
Tool preparation: screwdriver, electric drill, drill bit (hole diameter usually 18–22mm), wire pliers, rubber pry tool, traction wire, insulating tape, wire clips, etc.
Safety measures: First, disconnect the negative terminal of the car battery to prevent short circuits or electric shock.
Confirm camera type: Whether it is embedded (requiring drilling) or external (fixed with 3M glue or screws)
Mechanical installation steps
Select installation location:
Recommended at the center of the rear bumper, providing the widest view.
If you need to observe low obstacles close to the ground, you can choose above the rear bumper.
Drilling and fixation:
Use a drill bit to drill at the marked position, with a hole diameter matching the camera bracket.
Insert the camera into the hole and fix it with the corresponding screws or clamps, ensuring the lens is facing the rear of the vehicle and the angle is stable.
Wiring layout and connection
Wiring path (for common vehicle models):
Introduce the camera wiring through the hole in the rear license plate light into the trunk.
Remove the trunk liner, pull the wiring with the traction wire into the trunk.
Remove the left trim panel, lead the wiring along the original vehicle wiring path towards the driver's cabin direction.
Pull the rear seat door sealing rubber strip, and send the wiring into the vehicle.
Finally, connect to the reversing camera host (usually connected to the AV input port or OBD interface).
Wiring method:
Power wire (usually red) connects to the positive terminal of the reversing light (powered when reversing).
Ground wire (black or brown) connects to the vehicle's metal grounding point.
Video signal wire (usually yellow) connects to the AV input port of the display.
Note: Wiring paths vary greatly for different vehicle models. It is recommended to refer to the vehicle repair manual or consult a professional technician.
Testing and adjustment
Restore the battery connection, start the vehicle and shift into reverse gear.
Check if the display screen picture is clear and free of obstructions.
Adjust camera angle: Ensure coverage of the rear area (ideal inclination 15–20 degrees).
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