Powerflex PFR5-4613 Rear Subframe Rear Bush Insert Pack (2) for BMW Z4 E89 (2009-On) Polyurethane Suspension Handling Upgrade

Powerflex PFR5-4613 Rear Crossmember Mount Inserts - BMW Z4 E89 2009 onwards

Transform the rear-end feel of your E89 Z4 with this precision-engineered insert kit from Powerflex. By bracing the factory crossmember bushes, these urethane inserts curb unwanted movement under load, giving you cleaner turn-in, a more planted rear axle, and confidence-inspiring stability on fast road, daily use, and track days.

Part number: PFR5-4613

What you will notice

• Reduced rear cradle shift for tighter, more predictable handling
• Improved traction and stability under acceleration and braking
• More consistent tyre contact patch for grip you can trust
• Cleaner steering feedback with less rear-end vagueness
• Long-lasting performance thanks to durable polyurethane

Why this upgrade works

• Controls crossmember deflection so suspension geometry stays true
• Helps combat uneven tyre wear and imprecise chassis behaviour
• Engineered urethane compound balances precision with comfort, keeping NVH close to OE
• Backed by the Powerflex Lifetime Warranty for complete peace of mind

Fitment and details

• Primary application: BMW Z4 E89 2009 onwards
• Diagram reference: 11
• Kit contents: 2 inserts
• Installs into the voids of the original rear crossmember bushes

Additional manufacturer fitment note provided: Fits all X3, E46 and Z4 vehicles including M3 and Z4M. Fits into voids in original bush.

OE reference

3331677078133312283419

Real-world feedback

We have fitted these on our own builds and for customer cars, and the difference is immediate - a tighter rear end, better traction, and a more composed feel without sacrificing day-to-day comfort. A smart upgrade if your ageing rubber mounts are softening or you want sharper response.

Installation

Professional fitting recommended. Book your install with MJ Modifications in Warwickshire - request a quote at info@mjmodifications.co.uk.

Helpful search terms

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