Powerflex PFF5-1401BLK Black Series 95A Caster Arm to Subframe Bush Kit for BMW X5 E70 and BMW X6 E71 E72

Transform the front end of your BMW SUV with this competition grade polyurethane bush set. Designed for the forward lower arm on the front axle, these uprated bushes lock down geometry under braking and cornering, giving sharper steering feel, reduced wander, and repeatable handling accuracy. If you are fed up with vague response from tired OE rubber, this is the go to upgrade for fast road and track driving.

This kit replaces the bush on the tension strut also known as caster arm, reaction rod or thrust arm where it mounts to the body. Manufactured from a 95 Shore A Black Series compound, it resists deflection far better than standard parts, improving stability and confidence especially on heavy E70 and E71 platforms.

Why this upgrade works

• High durometer 95A polyurethane controls arm movement for crisper turn in and consistent alignment under load
• Improves braking stability and helps reduce shimmy that can be felt through the wheel on worn factory bushes
• Durable construction outlasts rubber in demanding use while maintaining precise geometry
• Direct replacement for the front lower arm bush at the chassis end on applicable BMW X5 and X6 models
• Ideal for fast road, circuit and competition where steering accuracy matters

We fit these at MJ Modifications in Warwickshire and our customers consistently report a firmer, more connected front end with better feedback through the wheel. Expect an increase in NVH compared with softer, comfort orientated compounds which is typical for motorsport focused bushes.

Part number

PFF5-1401BLK

OEM cross references

• 31106778015
• 31126773949
• 31126773950

Vehicle compatibility

• BMW X5 E70 2006 to 2013
• BMW X6 E71 2007 to 2014
• BMW X6 ActiveHybrid E72 2008 to 2011

What you receive

• 2 x Black Series bushes for the front caster arm to body mounting

Quantity per car: 2. One kit covers both sides.

Diagram

Diagram reference: 1

Performance comparison

Installation

Professional fitting recommended. MJ Modifications in Warwickshire can install this kit for you. Request a quote at info@mjmodifications.co.uk.

Download the official installation guide: PFF5-1401BLK install instructions

Fitment check

Before dispatch we confirm compatibility. Add your UK registration or the last 7 digits of your VIN at checkout and our team will verify the part suits your vehicle.

Brand

Powerflex

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