Original BMW Steering Knuckle for 3 Series & Z4 (1999–2008)

For BMW 3 Series & Z4 from 1999–2008, BMW supplies this Steering Knuckle as an Original BMW replacement component. It supports the wheel hub and joins the steering and suspension hardware. The supported range includes 323Ci, 323i, 325Ci, 325i, 328Ci, and 328i, plus additional listed variants. As an Original BMW component, it is produced within BMW’s own vehicle-specific design and testing program.

Technical Details

• Manufacturer part number: 31-21-1-096-430
• Manufacturer: BMW
• Component: Steering Knuckle
• Primary function: supports the wheel hub and joins the steering and suspension hardware
• Vehicle applications: BMW 3 Series & Z4
• Production range: 1999–2008
• Listed models: 323Ci, 323i, 325Ci, 325i, 328Ci, and 328i, plus additional listed variants
• Listed submodels: Coupe 3.0si, Roadster 3.0i, and Roadster 3.0si

Fitment & Compatibility

Use the year-and-model entries below to verify the exact vehicle application. Confirm steering-system version, mounting position, side, and production date before ordering. A VIN check can resolve production splits or equipment differences. PMB Performance brings more than 20 years of European-parts experience to that review.