Powerflex Front Radius Arm to Chassis Bushes for BMW 4 Series F32 F33 F36 (2013-2020) - Road Series Polyurethane Front Tension Strut/Lower Control Arm Bush Kit (Pair) - Replaces 31126855743 31126855741 31126855742

BMW 4 Series F32 F33 F36 Front Axle Poly Bush Upgrade 2013 to 2020

Give your 4 Series sharper turn in, steadier braking and a more planted front end with these Powerflex polyurethane bushes for the front compression strut to body mounting. This pair replaces the soft factory rubber at the front tension arm to chassis location, tightening up steering response and keeping geometry stable under load without adding unwanted harshness. Ideal for road and fast road builds that want precision and durability in real world driving.

What you will feel

• Crisper steering and immediate response through the wheel
• Reduced brake dive and better stability in heavy braking zones
• Consistent alignment under cornering loads for improved grip and confidence
• Long lasting performance that resists oil, heat and ageing compared with OE rubber
• Great daily manners with performance benefits for spirited road use

Why Powerflex poly bushings

Engineered for the Road Series, these bushes control deflection at the crucial front thrust arm to body interface, where factory parts often wear quickly and cause vagueness, shimmy or brake judder. Polyurethane construction offers a tougher, more stable mount that keeps the wishbone located correctly mile after mile.

Fitment and details

• Platform: BMW 4 Series F32 Coupe, F33 Convertible, F36 Gran Coupe
• Model years: 2013 to 2020
• Location: Front compression strut to chassis body mount on the front axle
• Also known as: front thrust arm bush, front wishbone bush, front guide arm bush, lower arm to body bush, control arm bushing
• Supplied as: Pair
• OE reference numbers replaced: 31126855743, 31126855741, 31126855742
• Caster increase option available separately: PFF5-1901G

Proven on our cars and our customers’ cars

We have fitted this upgrade across multiple F3x 4 Series builds and the feedback is consistent. Tighter front end feel, calmer steering on bumpy roads and more confidence under late braking. Customers regularly report improved tyre wear and fewer replacements compared with repeatedly fitting standard rubber bushes.

Installation guidance

Professional installation is recommended. Torque fasteners at normal ride height and book a four wheel alignment after fitting to maximise tyre life and steering accuracy.

Want us to install it for you? MJ Modifications offers expert fitting in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search friendly terms

BMW F32 front wishbone bushes, BMW F33 thrust arm bush kit, BMW F36 compression strut bushings, BMW 4 Series front arm to body bushes, BMW F3x front control arm bushing upgrade, polyurethane suspension bushes BMW 4 Series, front axle arm bush kit, BMW brake judder fix bushes, BMW steering shimmy cure, performance poly bushes for BMW F32 F33 F36, OE replacement bushing set 31126855743 31126855741 31126855742.