Powerflex Poly Bushes Rear Subframe Mount Insert Kit (Polyurethane/Urethane) for BMW 1 Series E81 E82 E87 E88 E8x – Rear Axle Carrier/Cradle Bushings – PFR5-423 – Replaces OE 33 31 6 768 645

Sharper rear-end control for your BMW 1 Series E8x

Unlock tighter handling and rear axle stability with this premium polyurethane rear subframe mounting insert kit. Designed to curb unwanted cradle movement and improve tyre contact during cornering and braking, it is an ideal fast-road and track-day upgrade for BMW 1 Series E8x owners seeking a more connected, confidence-inspiring drive.

Part number: PFR5-423

Vehicle compatibility: BMW 1 Series E81 hatch, E82 coupe, E87 hatch, E88 convertible

• Diagram reference: 20
• Pack quantity: 2 inserts
• OE cross reference: 33 31 6 768 645

Why upgrade your rear axle carrier mounts

• Reduces subframe deflection for cleaner turn in and more predictable rotation
• Improves traction on uneven surfaces and helps curb wheel hop under acceleration
• Promotes even tyre wear by keeping geometry more consistent under load
• Durable polyurethane resists oil, road grime and ageing far better than rubber
• Excellent NVH control when compared with tired factory bushes
• Backed by a lifetime warranty for long term peace of mind

Fitment notes

Suitable for manual transmission cars built from 07/2005 onwards. For earlier manual models and all automatic cars use PFR5-421 inserts, or choose the complete replacement option PFR5-422 if you want to fully refresh the mounting point.

Real-world results

We have installed this uprated insert kit on customer E8x cars and on our own builds at MJ Modifications. Drivers consistently report a tighter rear end, improved stability under braking and a more planted feel without an intrusive increase in cabin noise.

Professional fitting available

Want it fitted properly first time. Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote.

Common search terms

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