BMW 3 Series E90 325i N52 Front Left N/S Suspension Leg Brake Disc Hub Caliper

BMW 3 Series E90 325i N52 Front Left N/S Suspension Leg Brake Disc Hub Caliper is an original suspension component designed for the front left side of this model. Thanks to its factory geometry and precise fitment for this specific engine version, it ensures stable handling, accurate wheel tracking, and proper integration with the braking system. It is a practical solution for users looking for a proven suspension component for repair or replacement in their BMW.

Specifications and technical data

• SKU: 6769091-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6769091
• Substitutable numbers: 6769091, 34116769091, 34116854998, 6854998, 3411676464334116772669, 67646436772669, 31216765157, 6765157, 31216793923, 6793923, 31216764443, 6764443
• Location on the vehicle: Front, Left
• Category: Suspension Component Replacement Kits

Purpose and function in the BMW E90 suspension

The presented steering knuckle with caliper mount is a structural element of the front suspension, responsible for holding the wheel hub, interfacing with the suspension strut, and guiding the brake caliper. Mounted on the front left side of the vehicle, it serves as a key connection point for load-bearing elements, the steering system, and the braking system, influencing wheel geometry, driving stability, and braking efficiency.

Construction and technical compatibility

The steering knuckle was designed by the vehicle manufacturer specifically for the BMW 3 Series E90 platform in the 325i version with the N52 engine. This ensures the correct geometry for mounting the control arms, shock absorber, hub, and brake caliper, which facilitates installation and reduces the risk of wheel alignment issues. The presence of a dedicated brake caliper mount allows for the direct transfer of braking forces to the suspension structure, in accordance with factory specifications.

The part has an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific vehicle configuration. This allows for precise selection of the steering knuckle for a given BMW unit, minimizing the risk of incompatibility.

Use in Suspension Replacement Kits

The steering knuckle with caliper mount fits perfectly into the Suspension Replacement Kits category, where it is often combined with the replacement of several other elements simultaneously to restore full suspension performance. In practice, the installation of such a component is particularly recommended in cases of:

• damage following a collision or hitting an obstacle,
• excessive wear of mounting elements and guide bearings,
• problems with maintaining wheel geometry or uneven tire wear,
• modernization and comprehensive front suspension refurbishment.

As a used part, the steering knuckle allows for an economical repair while maintaining the original design and fitment to factory mounting points.

Benefits of using an original BMW steering knuckle

Choosing an original steering knuckle with caliper for the BMW E90 325i N52 offers a number of practical advantages:

• Factory fitment – preservation of original mounting points and suspension geometry, which facilitates wheel alignment and improves driving stability.
• Consistent cooperation with the braking system – the dedicated caliper mount ensures the correct position of the disc and pads relative to the wheel.
• Repair cost savings – a used component allows for reduced costs compared to a new part, while maintaining a design consistent with BMW engineering.
• Integration potential for broader maintenance – the steering knuckle works well when simultaneously replacing control arms, shock absorbers, or steering system components.

Professional selection and installation

To fully utilize the potential of this steering knuckle, it is worth ensuring professional installation and subsequent wheel alignment. It is recommended to compare the OEM part number and interchangeable numbers with the vehicle documentation or the existing part to confirm full compatibility. After installation, it is recommended to check the condition of cooperating suspension and brake components to avoid uneven load on the newly installed part.

If you are planning a comprehensive repair or modernization of the suspension area in your BMW and need other elements from the same group, such as control arms, shock absorber struts, or wheel hubs, check the available parts in the BMW Suspension Replacement Kits category.

Expert support when choosing used suspension components

When selecting a used steering knuckle with a caliper, knowledge regarding the structural differences between standard and sport suspension, as well as the principles of safely using aftermarket parts, can be helpful. A detailed discussion of these topics, along with examples and answers to frequently asked questions, can be found in the article "Standard vs. sport suspension – structural differences and is it worth buying used suspension parts?".