Powerflex PFR5-1421 Rear Subframe/Cradle (Rear Axle Carrier) Front Mount Insert Bush Kit for BMW X5 F15 2013-on - Polyurethane Suspension Bushing Upgrade - Fits OE 33316784940 - 2 Inserts

PFR5-1421 Poly Insert Kit for BMW F15 X5 - Rear Carrier Front Mounts - Fits OE 33316784940 - 2 Inserts

Transform the way your F15 X5 drives with this PFR5-1421 poly insert kit. Designed to locate inside the existing rubber mount with OE reference 33316784940, these uprated polyurethane inserts stabilise the rear axle carrier under load for crisper turn in, improved straight line stability and more predictable cornering. Ideal for daily use, fast road driving and towing, this simple insert solution delivers a serious chassis upgrade without the hassle of full bush removal.

Why this upgrade works

• Cuts unwanted cradle movement for sharper steering feel and better traction
• Improves braking stability and rear end control on uneven surfaces
• Helps maintain a consistent tyre contact patch for enhanced grip and confidence
• Durable polyurethane resists wear and heat better than ageing rubber while keeping NVH in check
• Backed by the Powerflex Lifetime Warranty for long term peace of mind

What you get

• Rear carrier front mount insert kit - PFR5-1421
• Quantity - 2 inserts to complete the position
• Installation grease and instructions

Fitment and details

• Vehicle - BMW X5 F15 2013 onwards
• Location - front mounts of the rear sub-frame cradle
• Type - insert that fits into the existing OE bush
• Compatible OE reference - 33316784940
• Powerflex part number - PFR5-1421
• Diagram reference - 21

This insert kit works with the factory rubber mount, reinforcing the voids to reduce deflection. It is a cost effective way to tighten the rear of the car and lift driving precision, with minimal added noise or harshness.

Real world results

We run these inserts on our own builds and have fitted them for many F15 owners. Feedback is consistently positive, with customers reporting a more planted rear end, cleaner power delivery and a noticeable boost in overall confidence behind the wheel.

Professional fitting

We recommend installation by MJ Modifications in Warwickshire. For a tailored quote or to book workshop time, email info@mjmodifications.co.uk.

Part numbers

PFR5-1421 - compatible with OE 33316784940.

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