BMW 1 Series F20 F21 Rear Subframe Bush Inserts Kit (2) – Powerflex PFR5-1921 Polyurethane Rear Axle Carrier/Cradle Mount Suspension Bushing Upgrade (OE 33316792510)

Part number: PFR5-1921

Vehicle: BMW 1 Series F20 and F21

Location: Rear axle carrier. Rear position insert.

Diagram reference: 21

Pack contents: 2 inserts

Unlock sharper handling and rock solid rear end stability on your BMW with this Powerflex polyurethane rear axle carrier insert kit. PFR5-1921 sits inside the cavities of the factory rubber mount to curb cradle movement, tightening up the back of the car for more confidence on fast road and track day driving while keeping everyday comfort intact.

By limiting sub-frame shuffle, these inserts help the suspension geometry stay where it should be. Expect cleaner turn in, better traction on corner exit, more predictable braking, and more consistent tyre contact. Many owners also see a reduction in irregular tyre wear thanks to improved alignment control.

• Performance upgrade for BMW F20 and F21 rear axle carrier
• High quality polyurethane construction for durability and resilience
• Reduces sub-frame deflection for crisper steering response
• Helps maintain consistent toe and camber under load
• Excellent longevity compared to ageing factory rubber
• Great value handling improvement with minimal change to NVH
• Manufacturer lifetime warranty for peace of mind

We run these inserts on our own builds and they are a favourite with our customers who want a planted rear end without going harsh. Feedback is consistently positive on both daily driven and fast road setups.

Cross reference OE number: 33316792510

Fitting and support: Want it installed by professionals who know BMW chassis inside out. Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and expert advice.

Common search terms: BMW 1 Series rear axle bush insert. F20 rear cradle insert kit. F21 rear sub frame bushing upgrade. Polyurethane subframe insert BMW. Rear carrier mount insert. BMW handling upgrade. Rear end stability mod. Suspension bush insert kit. Track day suspension upgrade. Fast road bushings. Rear cradle stability. Tyre wear reduction. Steering precision. Cornering grip improvement.