Genuine BMW 31-21-6-799-097 Steering Knuckle - Left Side

The Genuine BMW 31-21-6-799-097 steering knuckle is a factory OEM component designed to serve as the critical connection point between the wheel hub, suspension system, and steering linkage on your BMW vehicle. Also known as a wheel carrier or hub carrier, this precision-engineered part is responsible for translating steering wheel input into directional changes while supporting the weight of the vehicle and managing dynamic forces during driving.

Key Features and Functions:

• Genuine BMW OEM part ensuring exact fit and premium quality construction
• Contains the wheel hub mounting point, allowing the wheel to rotate freely on its bearings
• Connects to suspension components via ball joints, maintaining proper wheel alignment geometry
• Provides mounting points for brake caliper and supports the brake rotor assembly
• Pivots on ball joints when steering input is applied, enabling directional control
• Manufactured from high-strength cast or forged materials to withstand steering forces, cornering loads, and braking stresses
• Features precision-machined surfaces for accurate wheel bearing installation and seal retention
• Includes ABS sensor mounting provisions for proper anti-lock brake system operation

Application Notes:

• Position: Left (driver side)
• Designed for BMW 4-Series vehicles (430i, 440i models)
• For vehicles without xDrive (rear-wheel drive configuration)
• Replacement may affect wheel alignment settings; professional alignment recommended after installation

A damaged or worn steering knuckle can compromise steering precision, cause uneven tire wear, and affect overall vehicle safety. This genuine BMW replacement part ensures your vehicle maintains the performance and handling characteristics it was engineered to deliver.