Ball joint VYNX Factory OE ST-2904400A For BYD

information

Product Information

Our factory-manufactured VYNX ball joint with part code ST-2904400A serves as an indispensable load-bearing component installed inside automotive steering and suspension systems, produced from premium high-tensile alloy steel that goes through rigorous incoming material screening at our standardized auto parts manufacturing plant. Multi-stage internal quality management strengthens the product’s structural stiffness, fatigue crack resistance, static load capacity and dynamic shock tolerance to adapt to diverse road conditions, covering smooth urban asphalt roads, loose gravel country lanes and bumpy mountain roads prone to abrupt pavement impacts. During daily city commutes, cross-provincial highway trips and suburban off-road travel, this ball joint bears lateral steering tension, continuous road vibration and reciprocating suspension displacement. It effectively prevents premature metal fatigue deformation, the main root cause of sluggish steering response, recurring chassis rattling noise, uneven tire tread abrasion and shortened tire service cycles. Our production team carries out periodic sampling inspections across every processing phase to eliminate hidden defects including raw material impurities, dimensional deviations and incomplete forging structures. All finished products undergo batch tensile load testing, torsion strength verification and cyclic swing durability assessments before packaging. Stable factory-controlled quality alongside competitive bulk pricing makes this ball joint a high-demand stocking product for local repair garages, regional domestic spare parts retailers and cross-border aftermarket wholesale clients.

All core processing workflows for the ST-2904400A ball joint are completed in our ISO-certified dedicated chassis component workshop. High-precision CNC turning and milling machining maintains dimensional tolerance consistent with mainstream OEM standards, realizing straightforward bolt-on replacement without extra manual trimming during garage installation. Scientific quenching and tempering heat treatment optimizes the internal metallographic structure of the spherical core, greatly upgrading anti-fracture performance against sharp impacts from deep potholes and curb collisions. Thick reinforced nitrile rubber dust boots form a reliable sealed barrier, blocking abrasive sand, rainwater, muddy sludge and corrosive winter deicing salt to slow down abrasive wear on internal pivot contact surfaces. Composite surface finishing combining zinc electroplating and black oxide passivation generates a dense inert protective coating, noticeably improving long-term anti-rust performance for vehicles running in humid coastal zones and frigid northern regions with regular road salt application. Pre-injected high-viscosity lithium-based chassis grease steadily reduces rotational friction of the pivot assembly, eliminating annoying metal squeaking noises under low-temperature environments or peak operating loads. Tuned to meet and exceed baseline OEM performance benchmarks, this aftermarket ball joint retains accurate wheel alignment across its entire service lifespan, fixing loose steering clearance and unstable lane tracking brought by aged original factory ball joints. Each package comes with matched lock nuts, cotter pins and auxiliary mounting hardware. Our factory provides flexible trade terms including EXW, FOB, CIF, DDU and DDP, accommodating large-volume aftermarket procurement, custom private label cooperation and targeted parameter customization requests submitted by global automotive aftermarket partners.