Powerflex PFR5-420 Polybush Rear Subframe Front Mount Kit for BMW 1 Series E81 E82 E87 E88 (E8x) – Polyurethane Bushing Pair – Rear Axle Carrier/Cradle Mounts – Replaces OE 33316758259

BMW 1 Series E81 E82 E87 E88 Rear Axle Carrier Front Mount Polyurethane Bush Set – PFR5-420

Transform the way your 1 Series drives with this uprated polyurethane bushing set for the rear axle carrier front mounts. Precision-engineered to replace the tired factory rubber, PFR5-420 tightens the rear end, reduces unwanted sub-frame movement and keeps geometry stable under load for cleaner turn-in, better traction out of corners and rock-solid high-speed composure.

If you want a fast-road or track-ready chassis feel without harshness, this is the go-to rear bush upgrade our team and customers trust. We’ve installed these on multiple E8x cars and the difference in steering response and rear stability is immediate and confidence-inspiring.

Key details

• Part number: PFR5-420
• Position: Rear axle carrier front mounts
• Pack contents: 2 bushes (pair)
• Diagram reference: 19
• Type: Full replacement polyurethane bush (not an insert)
• OEM cross-reference: Direct replacement for BMW 33316758259

Why choose this polyurethane bush kit

• Sharper steering and more precise rear-end control under acceleration, braking and cornering
• Helps maintain alignment and camber consistency for improved grip and tyre wear
• Durable compound for long-term performance compared with ageing OE rubber
• Balances performance with comfort to keep NVH in check on road use
• Backed by a Lifetime Warranty for peace of mind

Ageing factory rubber allows the rear cradle to shift, leading to vague handling and uneven tyre wear. These uprated PU bushes control flex so your suspension works the way BMW intended, delivering a crisper, more accurate feel without the sogginess of worn mounts.

Compatibility

BMW 1 Series E81, E82, E87, E88 – rear axle carrier front mounting points.

Related part numbers

• Full replacement bush: PFR5-420
• Alternative insert option for the factory bush: PFR5-419
• OE reference it replaces: 33316758259

Professional fitting

We’ve fitted these in-house with excellent results and great feedback from owners. For installation and alignment, book with MJ Modifications in Warwickshire. Request a fitting quote: info@mjmodifications.co.uk.

Buy with confidence

Upgrade your E8x rear sub-frame mounts today and enjoy a tighter, more predictable chassis on B-roads, daily drives and track days.

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