Powerflex PFR5-412-12a Rear Upper Control Arm to Hub/Knuckle Carrier Bushes (Pair) for BMW 1 Series E81 E82 E87 E88 (E8x), 3 Series xDrive E90 E91 E92 E93 (E9x AWD) & X1 E84 - Polyurethane Fast Road - Rear Wishbone/Upper Link Bushings Ref 12a

BMW E8x, E9x xDrive and X1 E84 rear upper arm to hub carrier poly bushes — PFR5-412-12a (Ref 12a)

Take the slack out of the back axle and sharpen your BMW’s responses with these uprated polyurethane rear upper arm to hub carrier bushes. Supplied as a matched pair for the knuckle joint position, part number PFR5-412-12a (Reference 12a) replaces the tired factory rubber inserts with a durable, fast-road compound that resists deflection, tightens geometry control and boosts confidence on B-roads and motorways alike.

We run these bushes on customer cars and they deliver exactly what keen drivers want: cleaner turn-in, calmer mid-corner behaviour, improved traction on exit and more consistent alignment under load. Expect better stability, reduced rear-end wander and the potential for more even tyre wear thanks to improved camber and toe control at the hub.

Why this upgrade works

• Reduces unwanted movement at the hub carrier to keep camber and toe where they should be
• Firmer polyurethane composition for precise handling without the harshness of solid mounts
• Direct-fit replacement for OE items with long service life and excellent resistance to oil, road salt and heat
• Ideal for spirited road driving and fast-road setups, while remaining perfectly usable every day

Vehicle applications

Fits the following BMW platforms for the rear upper link to hub/knuckle location:

• 1 Series: E81, E82, E87, E88
• 3 Series xDrive: E9x including E90/E91/E92/E93 all-wheel drive models
• X1: E84 including xDrive variants

What you receive

• 2 x polyurethane bushes for the rear upper arm to hub carrier position

Quantity required per vehicle: 2 bushes total. This kit covers both sides on the rear axle at the specified location.

Part references

• Manufacturer part number: PFR5-412-12a
• Reference: 12a
• EAN: 5055676501721

Fitting and support

Professional installation recommended. MJ Modifications offers expert fitting at our Warwickshire workshop. For a quote, email info@mjmodifications.co.uk.

Check fitment

We will confirm compatibility before dispatch. Add your UK registration or the last 7 digits of your VIN at checkout so we can verify the correct application.

Installation guide

Download the official fitting instructions

Image

Search terms customers use

BMW rear knuckle bushes, BMW hub carrier bush kit, BMW rear wishbone bushes, E81 rear arm bushings, E82 suspension poly bushes, E87 rear link bushes, E88 handling upgrade, E90 xDrive rear hub bushes, E92 xDrive rear upper link bushings, E93 xDrive suspension upgrade, E9x AWD rear knuckle mount, BMW X1 E84 rear arm to hub bushes, polyurethane suspension inserts, uprated rear axle bushes, performance bush kit, toe control bush, camber stability bush, fast road BMW bushes, BMW rear end stability upgrade, BMW chassis bushings, BMW rear geometry control.