Powerflex radius arm to chassis urethane bushing, BMW F-serie xDrive (F20, F22, F30…)

Powerflex Front Radius Arm Chassis Bush – BMW F-Series xDrive (F20, F22, F33, F31…)

Powerflex polyurethane bush for the chassis end of the BMW front radius arm is one of the most popular and sensible suspension upgrades for BMW F-series models. The original rubber bush is a known weak point and often begins to fail at relatively low mileage, especially on xDrive (AWD) vehicles.

Typical symptoms of a worn bush include vague steering feel, instability under braking, knocking noises, and uneven tyre wear. The Powerflex polyurethane bush restores front axle stability and improves steering precision without unnecessarily compromising ride comfort.

This is the chassis-side bush, designed to replace the factory rubber bush. By selecting the orientation of the inner sleeve, the desired caster angle can be adjusted (see the downloadable installation instructions below). Compared to repeatedly replacing standard rubber bushes, a quality polyurethane solution offers a firmer, more durable long-term fix.

Features

• Powerflex polyurethane bush – significantly more durable than OEM rubber
• Improves steering response and front axle stability
• Reduces braking-induced movement and knocking noises
• Popular and proven upgrade, especially for xDrive models
• Well suited for both daily road use and performance applications
• Caster angle can be adjusted via inner sleeve orientation

OEM References

• Bush: 31126854729 / 31 12 6 854 729
• Radius arm: 31126854723 / 31 12 6 854 724
• Radius arm: 31126854724 / 31 12 6 854 724

Compatibility (examples)

• BMW F20, F21 xDrive (2011–2019)
• BMW F22, F23 xDrive (2013–2021)
• BMW F30 / F31 xDrive (Sedan / Touring) (2011–2018)
• BMW F32 / F33 / F36 xDrive (2013–2020)

Please note that compatibility may vary depending on suspension type and vehicle specification. If you are unsure, you can always provide your vehicle registration number or VIN for confirmation.

Installation Instructions

Official Powerflex installation instructions can be downloaded here:
Download installation instructions (PDF) – BMW F-Series xDrive radius arm bush

Professional installation is recommended, and a wheel alignment check is always advised after replacing suspension bushes.