Powerflex PFF5-401G Caster-Adjustable Front Control Arm Rear Bush/Bushing Kit for BMW M3 E90/E92/E93 E9x 3 Series (2006-2013) - Polyurethane Tension Strut/Thrust Arm/Radius Arm to Chassis Bushes (Wishbone Rear Mount) - Pair

BMW E9x M3 Front Control Arm Rear Bush Kit - Caster Adjustable - PFF5-401G

Unlock sharper steering response, rock-solid stability and repeatable alignment on your 2006 to 2013 M3 Coupe, Saloon and Convertible with this uprated polyurethane front arm rear mount kit. This is the go-to upgrade for fast road builds and track day cars that need precision, durability and geometry control from their suspension hardware.

Why upgrade your front arm rear mounts

Factory rubber mounts in the front tension strut area soften with age and heat, allowing unwanted movement that robs confidence and tyre grip. This PFF5-401G caster-adjustable polyurethane bushing kit dramatically reduces compliance, improves camber gain while cornering and gives noticeably better braking stability at speed. Expect crisper turn-in, steadier mid-corner behaviour and a more connected feel through the wheel.

Key features

• Part number: PFF5-401G
• On-car caster adjustment of up to approximately ±0.75 degrees for fine tuning front-end geometry
• Black 95A polyurethane for high load capability and long-term performance
• Steel outer shells for improved load distribution and secure location
• Offset, adjustable CNC machined stainless sleeve with spanner included
• Approximately 25 percent stiffer than the previous design for even better stability
• Approximately 140 percent stiffer than tired OE rubber for a tight, precise feel
• Supplied as a pair - 2 bushes total
• Diagram reference: 1

Fitment and position

Designed for the BMW E9x M3 platform only: E90, E92 and E93 model years 2006 to 2013. Fits the front lower arm rear position to the body shell, also known as the thrust arm or tension strut rear mount.

OE cross references

• 31120393540
• 31126763719
• 31102283579

Road Series compound - built for real-world use

This Road Series specification is ideal for daily driving, fast road and occasional circuit work. By controlling unwanted movement, it helps maintain alignment, promotes even tyre wear and supports consistent chassis behaviour when you lean on the car.

What you will feel

• More direct steering and cleaner feedback
• Improved high-speed stability and confidence under heavy braking
• Better camber retention for front-end grip on corner entry and exit
• Greater durability compared with ageing rubber mounts

Trusted by MJ Modifications customers

We have fitted this kit to numerous customer E9x M3s as well as our own builds. Feedback is consistently positive, with drivers praising the immediate improvement in precision, stability and overall confidence on both road and track days.

Professional installation available

Want it fitted properly and aligned for the best results? Book in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting and setup quote.

Search-friendly tags and terms

BMW M3 E90 E92 E93 front control arm rear bushing kit, thrust arm bushes, tension strut bush upgrade, caster correction bushings, polyurethane suspension bushes, wishbone rear mount, E9x M3 2006 2007 2008 2009 2010 2011 2012 2013 alignment upgrade, PFF5-401G.