Car Aluminum Control Arms 4E0407151K 4E0407151E 4E0407151J for VW Phaeton Lower Suspension Arms

Core Functions and Roles

The control arm supports the vehicle weight by bearing its own weight, load, and dynamic pressure during driving. It controls wheel alignment to maintain proper camber and toe angles, preventing uneven tire wear and ensuring stable straight-line driving. Meanwhile, it guides wheel movement by constraining vertical travel and steering angles over bumps, potholes, and turns. It transmits steering, braking, and driving forces while buffering road impacts, and works with shock absorbers, springs, ball joints, and bushings to improve ride comfort and handling. Any failure may result in vehicle veering, shaking, abnormal noise, and uneven tire wear, which seriously compromises driving safety.