Dongfeng KL truck parts Upper right inner mudguard 8403322-C3300

Engineered as a critical underbody shield, this mudguard blocks 92% of mud, water, gravel, and road salt kicked up by the right rear tire—effectively protecting vulnerable components. It safeguards the rear axle’s brake lines (preventing salt-induced corrosion), fuel tank seams (avoiding rust leaks), and electrical wiring harnesses (reducing short-circuit risks from water intrusion). The mudguard’s curved arc design redirects debris downward at a 45° angle, preventing accumulation on frame rails and minimizing splashes onto the cab’s lower panels (cutting cab cleaning frequency by 45%). Even on unpaved construction roads, its rigid structure resists deflection from large stones (up to 50mm diameter), ensuring consistent protection without deformation

Crafted from glass-fiber-reinforced polypropylene (PP-GF25), the mudguard balances rigidity and flexibility to withstand harsh trucking conditions. The composite material endures temperature extremes (-45°C to 90°C)—remaining crack-free in freezing winters and non-warped in hot summers—and resists impact from debris (1kg weight dropped from 0.6m causes no permanent damage). Its surface is infused with UV-stabilizers that pass 1,800 hours of xenon arc testing (simulating 6 years of outdoor exposure) without fading or brittleness. Unlike metal mudguards prone to rust or low-grade plastic ones that split, this composite design maintains structural integrity for 7+ years of heavy use

To eliminate weak points, the mudguard features a full-perimeter EPDM rubber seal (6mm thickness) that presses tightly against the wheel well and body panels—blocking fine mud and water from seeping through gaps. The lower edge integrates a 35mm-wide debris deflector rib that redirects splashes away from the tire, preventing recirculation onto the underbody. Additionally, the mudguard’s mounting holes are fitted with rubber gaskets that seal against the frame, avoiding water intrusion into bracket threads (a common cause of rusted fasteners). These details ensure no water or debris bypasses the mudguard, even during heavy rain or off-road driving

Designed for easy replacement, the mudguard includes all necessary hardware: 8 M6×25mm stainless steel bolts, lock washers, and alignment guides that match the truck’s pre-drilled holes. No specialized tools are needed—installation takes 20–25 minutes by aligning the mudguard with the wheel well’s reference marks, tightening the bolts by hand (or with a basic socket wrench), and pressing the rubber seals into place. For maintenance, the smooth composite surface cleans easily with a pressure washer (up to 110 bar) or damp cloth, and the EPDM seal is replaceable via simple clips if worn. The material is resistant to oil, coolant, and road chemicals, so spills won’t stain or degrade it. Each unit undergoes dimensional checks (via CMM), impact testing, and seal integrity verification, backed by a 24-month warranty against defects (e.g., cracking, seal failure, UV fading)