Rear Axle Wishbone BMW F45 X1 F48 Control Arm Suspension Top Wishbone 6851563

BMW F45 X1 F48 Rear Upper Control Arm is an original part from the Control Arms and Ball Joints category, designed for the rear suspension of select BMW F45 and X1 F48 models. This used, factory control arm ensures proper axle geometry, stable vehicle handling, and predictable behavior during braking and cornering.

Specifications and technical data

• SKU: 6851563
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6851563
• Substitutable numbers: 6851563, 33326851563, 6870773, 33326870773
• Location on the vehicle: Rear
• Category: Control Arms, Ball Joints & Assemblies

Purpose and Function in Suspension

The upper rear control arm in a BMW is responsible for precise wheel guidance relative to the body and maintaining the set toe and camber angles. In F45 and X1 F48 models, this component works with other elements of the multi-link system, influencing:

• straight-line stability at higher speeds,
• even tire wear,
• effective transfer of drive and braking forces to the road surface,
• comfort in damping unevenness in the rear of the vehicle.

Its placement in the rear of the vehicle allows for effective control of the entire rear axle suspension, which is particularly important in cars with more advanced chassis designs.

Construction and Fitment for BMW

The presented control arm belongs to the BMW Control Arms and Ball Joints group, meaning it has been designed with specific mounting points and suspension characteristics of these models in mind. The appropriate shaping of the arm and factory mounting points enable:

• correct alignment with the rear axle beam and steering knuckle,
• maintenance of factory geometry without the need for structural modifications,
• compatibility with original accompanying components (bolts, bushings, ball joints).

This ensures a near-factory installation process, and after replacement, precise alignment of the rear axle geometry according to manufacturer recommendations is possible.

Benefits of Using an Original Rear Control Arm

Using an original rear upper control arm in the BMW F45 and X1 F48 helps maintain the integrity of the entire chassis system. Key benefits include:

• Factory Fitment – no installation problems or need for part modification,
• consistent suspension performance with other rear axle components,
• ability to restore factory geometry settings after repair,
• reduction of unwanted play and noises resulting from wear of the old component.

A used OEM part offers a sensible compromise between repair cost and maintaining driving characteristics consistent with BMW's design intentions.

Professional Installation and Operation

To fully utilize the potential of this control arm, installation in a specialized workshop is recommended, using appropriate torque specifications and subsequent geometry checks. During replacement, it is worth paying attention to:

• the condition of other control arms and ball joints on the rear axle,
• any wear of the metal-rubber bushings,
• even tightening after the vehicle is lowered onto its wheels.

This approach helps to prevent accelerated wear of new components and ensures stable vehicle handling in the long term.

More About BMW Control Arms and Suspension Systems

If you are looking for other BMW Control Arms and Ball Joints for your car, check out the BMW Control Arms and Ball Joints available in our store to find a complete solution for your front and rear axles.

Want to better understand how your car's suspension works and when to react to the first signs of wear? Read our guide “Suspension System – A Comprehensive Guide to Shock Absorbers, Control Arms, and Stabilizers”, where we discuss practical aspects of diagnosing and operating suspension components in popular models.

For drivers interested in making informed choices about used BMW parts, we have also prepared material explaining when such a purchase is worthwhile and what to look out for – you can find it in the article “Used Parts for BMW – Is It Worth It? Key Benefits for Brand Enthusiasts”.