A car's upper control arm (upper arm) links the top of the steering knuckle or wheel hub to the vehicle's frame, controlling vertical wheel movement and maintaining proper alignment.
Key Functions
• Camber Alignment: Controls how much the top of the tire tilts inward or outward. This keeps the tire tread flat on the road.
• Wheel Guidance: Guides the wheel assembly up and down over bumps and potholes while working with the lower control arm in double-wishbone or multi-link suspensions.
• Geometry Control: Manages caster and camber angles to ensure the car tracks straight and self-centers properly after a turn.
• Noise and Vibration Damping: Uses rubber or polyurethane bushings to absorb road harshness before it reaches the car body.• Not All Cars Have One: Vehicles with MacPherson strut suspensions use a strut instead of a