Powerflex PFR5-1920 Rear Subframe Front Bush/Bushing Insert Kit (Pair) for BMW 4 Series F32 F33 F36 (F3x) | Rear Cradle/Axle Carrier Mount Polyurethane Inserts | Replaces OE 33316792509

Rear Axle Carrier Front Insert Pair – PFR5-1920 – For BMW 4 Series F32 F33 F36

Transform the rear-end composure of your BMW 4 Series with this polyurethane insert pair designed for the forward mounts of the rear axle carrier. By filling the voids in the factory rubber, these inserts curb cradle deflection, keeping suspension geometry consistent for sharper turn in, stronger traction and a more planted feel on fast road and track use.

Part number: PFR5-1920

OEM cross-reference: 33316792509

Diagram reference: 20

Pack quantity: 2 inserts

Why this upgrade

• Limits rear cradle movement to maintain alignment under load
• Improves corner exit grip and reduces wheel hop
• Enhances turn in and driver confidence on B roads and circuit
• Promotes even tyre wear and better braking stability
• Polyurethane construction resists oil, heat and road grime for long service life
• Excellent noise and vibration control comparable to fresh OE mounts
• Covered by the Powerflex Lifetime Warranty

How it works

This insert kit sits within the empty spaces of the original equipment bushing, reinforcing it without the harshness of solid mounts. The rear cradle stays located, so alignment stays true and the tyres do the work. No need to press out the existing rubber, which keeps installation time down while delivering a big improvement in chassis precision.

Fitment

• BMW 4 Series F32 Coupe
• BMW 4 Series F33 Convertible
• BMW 4 Series F36 Gran Coupe

Application: front position of the rear axle carrier. Insert style component that fits into the voids of the original bush to reduce cradle movement.

Tried and trusted

We run these inserts on our own cars and customer builds. Feedback is consistently positive, with owners reporting a more settled rear end, cleaner power delivery and a tighter, more connected driving experience.

Professional fitting

Installation by specialists recommended. For expert fitting at MJ Modifications in Warwickshire, request a quote at info@mjmodifications.co.uk.

What you receive

One pair of polyurethane inserts for the forward locations of the rear axle carrier on the listed chassis codes.

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