Dongfeng VR truck parts Upper right inner mudguard assembly 8403320-C1100

Designed to prevent mud, water, stones, and road salt from splashing into the wheel well and damaging critical components (e.g., brake lines, suspension bushings), the mudguard features a multi-functional protective structure. The main panel has a 15° downward slope that channels debris away from the chassis, while a 50mm-wide extended flange along the bottom edge covers the tire’s upper inner arc—blocking 92% of upward-splashing mud (tested in heavy rain conditions). Two integrated debris deflectors (30mm tall, positioned at the front and rear of the mudguard) redirect stones and gravel away from the wheel well’s sensitive areas, reducing the risk of punctured brake hoses or scratched suspension parts. Unlike flat mudguards with minimal coverage, this design ensures comprehensive protection, extending the lifespan of underbody components by 30%

Built to withstand repeated impact from debris and extreme temperature fluctuations, the mudguard assembly uses a high-performance composite material: 70% polypropylene (PP) reinforced with 30% glass fiber. This material combination delivers a tensile strength of 280 MPa, impact resistance of 12 kJ/m² (even at -40°C), and heat resistance up to 110°C—perfect for enduring summer engine bay heat and winter road salt exposure. The mudguard’s surface is molded with a rigid ribbed structure (rib height 8mm, spaced 50mm apart) that enhances structural rigidity, preventing warping under heavy mud accumulation (up to 5kg of wet mud). Unlike thin plastic mudguards that crack or deform after 6–12 months, this composite design maintains shape and functionality for 5+ years of daily use

Engineered to resist degradation from road salt, moisture, and UV rays (common in inner wheel well environments), the assembly undergoes dual protective treatments. The composite material is infused with UV-stabilizers during manufacturing, preventing color fading and material brittleness even after 3,000 hours of direct sunlight exposure. All metal mounting hardware (6 M8×35mm bolts, lock washers, and brackets) are made of 304 stainless steel, which resists rust and corrosion—passing 1,200 hours of neutral salt spray testing without degradation. A 2mm-thick EPDM rubber gasket is pre-installed between the mudguard and chassis frame, creating a moisture barrier that prevents water from seeping into the frame’s mounting holes and causing internal rust. Unlike unprotected mudguards that deteriorate quickly, this design ensures long-term reliability in harsh climates

Designed for hassle-free replacement by fleet technicians or DIY owners, the mudguard assembly simplifies installation with precision features and complete hardware. It includes 6 pre-marked mounting holes (drilled to H9 tolerance for perfect bolt fit) and two laser-etched alignment lines that match reference points on the VR’s chassis frame, eliminating guesswork and reducing installation time to 20–25 minutes. The package comes with all necessary hardware: 6 stainless steel bolts, lock washers, the pre-installed rubber gasket, and a torque guide (specifying 35 N·m for secure mounting). Installation steps are straightforward: clean the chassis mounting surface, align the mudguard’s marks with the frame, secure the bolts to the specified torque, and verify tire clearance. No post-installation adjustments are needed— the OEM fit ensures proper alignment with suspension components. Each unit undergoes dimensional verification via CMM, impact testing, and corrosion resistance checks, backed by a 24-month warranty against defects (e.g., cracking, warping, hardware rust)