Dongfeng VL Left airbag shock absorber with connecting bracket assembly 5001175-C4321

Designed to optimize both ride comfort and load-bearing performance, this assembly features an airbag-integrated shock absorber that adjusts damping force based on vehicle load and road conditions. The airbag (inflated via the vehicle’s onboard air system) acts as a variable spring, providing softer damping for light loads (improving passenger comfort on smooth roads) and stiffer support for heavy loads (e.g., cargo hauling, ensuring stable handling and preventing excessive suspension sag). The shock absorber’s hydraulic cylinder works in tandem with the airbag to absorb road vibrations—effectively reducing jolts from potholes, rough pavement, or sudden impacts—while the adjustable air pressure allows the vehicle to maintain a level ride height, even with uneven weight distribution. This design is particularly beneficial for commercial Dongfeng VL models that alternate between empty and fully loaded operation

Prioritizing durability and safety, the assembly incorporates a high-strength steel connecting bracket (treated with anti-corrosion galvanization) that withstands extreme suspension forces—including lateral loads during cornering and vertical impacts from rough roads. The bracket’s weld joints are robotically precision-welded to ensure uniform strength, preventing cracking or deformation under stress. The airbag itself is constructed from multi-layered, puncture-resistant rubber (typically nitrile rubber reinforced with polyester fabric) that resists abrasion, oil, and chemical damage—avoiding leaks even after prolonged exposure to road debris or under-hood contaminants. Additionally, the shock absorber’s piston rod is chrome-plated to reduce friction and prevent rust, ensuring smooth stroke operation and extending the assembly’s service life

To maintain reliable damping performance and air pressure retention, the assembly features dual-sealing mechanisms for both the hydraulic and air systems. The shock absorber’s hydraulic cylinder uses a multi-lip piston seal and dust boot to prevent fluid leakage (ensuring consistent damping force) and block dirt, water, or debris from entering the cylinder (which causes premature wear of internal components). The airbag’s air inlet valve is equipped with a high-pressure O-ring seal (compatible with the Dongfeng VL’s air supply line) that forms an airtight connection, preventing pressure loss—critical for maintaining proper suspension height and load support. All sealed components undergo pressure testing (hydraulic: 5-10 MPa; air: 0.8-1.2 MPa) at the factory to ensure leak-free operation, even under extreme temperature fluctuations (-40°C to 80°C)

Engineered for efficient replacement, this assembly comes as a fully pre-assembled unit—combining the airbag shock absorber, connecting bracket, mounting bolts, and hardware (e.g., washers, lock nuts) that match the Dongfeng VL’s factory specifications. Installation requires no specialized tools beyond standard hand tools: simply remove the old assembly by disconnecting the air line and unbolting the bracket from the chassis/suspension, then secure the new assembly using the provided hardware and reconnect the air line. The pre-aligned bracket ensures the shock absorber is positioned at the correct angle (matching OE geometry), avoiding suspension misalignment that could cause uneven tire wear or handling issues. The entire process takes 45-60 minutes for professional mechanics, and the assembly is ready for immediate use once installed—no additional calibration or adjustment is needed