Powerflex Polyurethane PFF5-1901G Caster Adjustable Front Radius Arm to Chassis Bushes for BMW 1 Series F20 F21 (2011-2019) Front Control Arm/Wishbone Rear/Tension Strut Road Series Pair Replaces 31126855743, 31126855741, 31126855742

Powerflex PFF5-1901G Caster Adjustable Poly Bush Kit for BMW 1 Series F20 F21

Give your BMW 1 Series a razor-sharp front end with this caster tuneable polyurethane bush kit for the front lower arm rear mounting point. By controlling unwanted movement in the thrust arm, these bushes keep alignment consistent under braking and cornering, helping the car track straight, bite harder on turn-in and maintain confident road holding.

We run this upgrade on our own cars and the feedback from MJ Modifications customers has been outstanding. Expect a more connected steering feel, reduced brake shimmy and a calmer, more planted drive without a harsh ride. A brilliant fast-road solution that still works perfectly for daily use.

Highlights

• Part number: PFF5-1901G
• Vehicle fitment: BMW 1 Series F20 and F21, 2011 to 2019
• Position: front lower control arm rear mount to body (often called thrust arm, tension strut or front wishbone rear bush)
• Adjustability: on-car caster tuning of +/- 0.75 degrees for straight-line stability and sharper turn-in
• Compound: Road Series polyurethane, around 60 percent firmer than factory rubber to reduce deflection and keep geometry stable
• Performance benefit: adds useful dynamic camber on corner entry for stronger front-end grip
• Format: pair supplied, direct-fit replacement for the OE items

Replaces original equipment references

31126855743, 31126855741, 31126855742

Why upgrade to polyurethane

• Improved steering feel and response
• Greater braking stability with less wander and tramlining
• More consistent handling over time compared with ageing rubber
• Potential for longer tyre life due to steadier alignment

Ideal for drivers who want

• BMW F20 F21 suspension upgrades that enhance precision without going harsh
• A caster correction solution for the front lower arm rear location
• A quality poly bush kit for fast road use and spirited driving

Also searched as

BMW F20 thrust arm bushes, BMW F21 tension strut bushes, front lower arm rear bush kit, front wishbone rear mounts, caster correction bushes, compliance bushes, polyurethane control arm bushes, adjustable caster bush kit, Powerflex PFF5-1901G Road Series.

Non-adjustable alternative

Prefer a fixed-geometry option for the same position? See PFF5-1901.

Professional fitting

Installation and four-wheel alignment are recommended for best results. MJ Modifications offers expert fitting at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk.