BMW X5 E70 F15 E71 F16 Rear Axle Carrier Subframe Suspension Cradle 6863815

BMW X5 E70 F15 X6 E71 F16 Crossmember Rear Subframe is an original structural component of the rear body, classified under longitudinal body frame parts and brackets. It ensures stable mounting of suspension components and transfers loads from the rear axle to the body structure, which is crucial for vehicle handling and safety.

Specifications and technical data

• SKU: 6863815
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6863815
• Substitutable numbers: 33316863815, 6863815, 33316770945, 6770945, 33316780844, 6780844
• Weight: 150
• Location on the vehicle: Rear
• Category: Frame Rails & Subframes

Purpose and Function in the Vehicle

The presented rear subframe / crossmember / beam is designed for BMW X5 models of the E70 and F15 generations, and BMW X6 models of the E71 and F16 generations. This element serves as a mounting base for key rear suspension components and contributes to the rigid load-bearing structure of the rear body.

The main tasks of this bracket include:

• Load transfer from the rear axle wheels to the body during driving, braking, and traversing uneven surfaces.
• Ensuring suspension geometry through stable mounting points for control arms, bushings, and other elements.
• Interaction with safety systems that require predictable body and suspension behavior under various road conditions.

Construction and Technical Category

The crossmember belongs to the category of Longitudinal body frame parts and brackets, meaning it is a structural element with increased strength requirements. Its purpose is to maintain the appropriate rigidity of the rear of the vehicle and resistance to long-term operational loads.

In practice, this translates to:

• Stable vehicle handling at higher speeds and under load.
• Minimizing structural deformation at suspension mounting points.
• Improved performance of elastic elements (bushings, mounts), which can properly dampen vibrations only with a rigid mounting base.

Benefits of Using an Original BMW Crossmember

Choosing an original BMW rear crossmember from this model group allows for the preservation of factory handling and ride comfort parameters. The component has been specifically designed considering the weight distribution, suspension characteristics, and rear axle geometry of the X5 and X6 SUVs.

• Factory Fitment – maintaining original mounting points and spacing, which facilitates installation and geometry alignment.
• Integration with Body Structure – the crossmember works in conjunction with the chassis rails and other brackets, forming a unified load-bearing structure.
• Optimal Rigidity – the appropriately selected structural characteristics contribute to predictable vehicle behavior in corners and under load.

Condition, Origin, and Installation Aspects

The offered crossmember is a used part, sourced from disassembly, and has the status of a used BMW part. For workshops and users, this means the possibility of an economical repair of the rear body while maintaining the original manufacturer's specifications.

Before installation, it is recommended to:

• Verify the condition of surfaces at suspension and bolt mounting points.
• Perform a geometry check after the replacement is complete to confirm correct rear axle alignment.
• Select appropriate accompanying components (bolts, bushings, mounts) according to the vehicle manufacturer's recommendations.

BMW Longitudinal Body Frame Parts and Brackets – Selection and Technical Knowledge

If you are looking for other BMW longitudinal body frame parts and brackets, check availability in our catalog: BMW longitudinal body frame parts and brackets. This will help you easily select compatible structural components for your specific X5 or X6 model.

When replacing suspension load-bearing elements, it is also advisable to familiarize yourself with the differences between standard and sport configurations, as well as the specifics of used components. A detailed discussion can be found in the article: Standard vs. Sport Suspension – Construction Differences and Selection of Used Suspension Parts, which helps in making informed decisions for repairs and upgrades on BMW vehicles.

For comprehensive repairs of accident-damaged rear body and load-bearing structures, the guide may also be useful: Body and Chassis – Accident Repairs Using Dismantled Parts, which describes practical procedures for working with frame and bracket components.