Powerflex PFR5-1921 Rear Subframe Rear Bush Insert Kit (Pair) - BMW 4 Series F32 F33 F36 - Polyurethane Suspension Bushes - OE 33316792510

Uprated Rear Axle Carrier Insert Set for BMW 4 Series F32 F33 F36

Transform the way your 4 Series drives with this high grade rear axle carrier insert set. Designed to locate within the voids of the factory rear carrier mounts, this upgrade tightens up the rear end, curbs unwanted cradle movement, and delivers crisp turn in, better traction and rock solid stability on fast road and track. If you are searching for rear cradle bush inserts for BMW F3x, stiffer rear sub-frame mounts, poly rear bushing upgrade, or a handling improvement kit for F32, F33 and F36, this is the proven choice.

Why enthusiasts choose this rear carrier insert kit

• Sharper steering feel and more direct chassis response under acceleration, cornering and braking
• Reduces rear cradle deflection for improved traction and confidence on bumpy roads
• Keeps the tyre contact patch working harder for consistent grip and reduced uneven tyre wear
• Durable polyurethane construction that resists oil, road salt and abrasion for long service life
• Ideal for fast road, spirited driving and track day use with excellent NVH control versus ageing rubber
• Great value upgrade that avoids repeatedly replacing soft OE bushes
• Backed by a Lifetime Warranty from the manufacturer

What it does

The inserts occupy the voids in the original rear axle carrier bushings to limit compliance. By firming up the rear sub-frame location, the suspension geometry remains consistent, delivering cleaner feedback, better stability in quick direction changes and a more planted rear end without resorting to harsh solid mounts.

Real world results

We have fitted this kit on customer cars and run it on our own builds. Owners report a tighter, more composed rear end, reduced wheel hop and a clear uplift in confidence at speed while maintaining excellent road manners.

Fitment and details

• Vehicle: BMW 4 Series F32 Coupé, F33 Convertible, F36 Gran Coupé
• Location: Rear axle carrier rear position insert set
• Quantity: 2 inserts per kit
• Diagram reference: 21
• Manufacturer part number: PFR5-1921
• OEM cross reference for identification: 33316792510
• Material: Performance-grade polyurethane

Popular search terms our customers use

BMW F32 rear subframe inserts, BMW F33 rear axle bushings, BMW F36 rear cradle mount upgrade, poly bush kit BMW 4 Series, rear sub-frame bushing reinforcement, handling upgrade F3x, track day suspension BMW 4 Series, rear carrier bush insert set, chassis bush upgrade, UK poly bushes for BMW.

Installation

Professional fitting recommended. For expert installation and setup, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Buy with confidence

Trusted by enthusiasts, backed by a Lifetime Warranty and supported by our in-house experience. Order your PFR5-1921 rear carrier insert kit today and unlock the handling your 4 Series deserves.