Powerflex Rear Subframe/Rear Axle Carrier Front Mount Poly Bush Insert for BMW 1 2 3 4 Series F20 F21 F22 F23 F30 F31 F34 F32 F33 F36 (F2x F3x, RWD & xDrive) - PFR5-1920 - Replaces OE 33316792509 - Fits M135i M140i M235i M240i 335i 340i 435i 440i

Polyurethane Rear Axle Carrier Front Mount Insert - BMW F Series - PFR5-1920

Take the slack out of the rear of your BMW and unlock a tighter, more planted drive. This Powerflex Road Series insert sits in the cavities of the factory rear axle carrier front mounting bush to curb subframe movement, cutting deflection under load and delivering crisp turn-in, improved traction and greater stability on fast road use. It is a smart, great-value upgrade that enhances confidence without the cost or complexity of a full bush replacement.

Part number: PFR5-1920 - direct alternative for OE number 33316792509. Diagram reference: 20.

Why choose this insert

• Controls rear cradle movement to reduce wheel hop and squat on acceleration.
• Sharper steering feel and more precise chassis response in bends and during hard braking.
• Road Series polyurethane balances performance with comfort, keeping NVH increase to a minimum.
• Quick-fit insert design - fits into the voids of the factory mount, no pressing out of the original bush.
• Cost-effective handling upgrade for daily-driven and fast road cars.
• Prolongs tyre life by keeping geometry more consistent under load.

We have installed these in-house on our own and customer cars with consistently excellent feedback for improved control and a more connected rear end.

Fitment - BMW F Series platforms

For rear-wheel drive and xDrive variants across the following models and years:

• BMW 1 Series F20 F21 including LCI - 114d, 114i, 116d, 116ed, 116i, 118d, 118dX, 118i, 120d, 120dX, 120i, 125d, 125i, M135i, M135iX, M140i, M140iX
• BMW 2 Series F22 F23 including LCI - 218d, 218i, 220d, 220dX, 220i, 225d, 228i, 228iX, 230i, 230iX, M235i, M235iX, M240i, M240iX
• BMW 3 Series F30 F31 including LCI - 316d, 316i, 318d, 318dX, 318i, 320d, 320d ed, 320dX, 320i, 320i ed, 320iX, 325d, 328d, 328dX, 328i, 328iX, 330d, 330dX, 330e, 330i, 330iX, 335dX, 335i, 335iX, 340i, 340iX, ActiveHybrid 3
• BMW 3 Series F34 GT including LCI - 318d, 320d, 320dX, 320i, 320iX, 325d, 328i, 328iX, 330d, 330dX, 330i, 330iX, 335dX, 335i, 335iX, 340i, 340iX
• BMW 4 Series F32 F33 F36 including LCI - 418d, 418i, 420d, 420dX, 420i, 420iX, 425d, 428i, 428iX, 430d, 430dX, 430i, 430iX, 435dX, 435i, 435iX, 440i, 440iX

Popular performance applications: M135i, M140i, M235i, M240i, 335i, 340i, 435i, 440i.

What you receive

• 2 x polyurethane insert pieces
• You will require 2 bushes per car

Installation and support

Designed to slot into the existing bush voids for a straightforward install. Professional fitting recommended.

Want us to fit it for you? MJ Modifications offers expert installation at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk.

Compatibility check

Before dispatch we confirm fitment against your vehicle. Add your UK registration or the last 7 characters of your VIN at checkout and we will verify compatibility.

Part numbers

• Powerflex: PFR5-1920
• Replaces OE: 33316792509

Related options

Building a matched setup for the rear carrier assembly? Pair this with the corresponding rear-position insert for a complete solution. For more aggressive use, see the Powerflex Black Series alternative.

Search-friendly terms

BMW F20 F21 F22 F23 F30 F31 F34 F32 F33 F36 rear axle carrier front mount insert, F-series cradle bush upgrade, polyurethane suspension bushes BMW, sub-frame mount insert F2x F3x, chassis reinforcement insert, poly bush kit BMW 1 Series 2 Series 3 Series 4 Series, handling upgrade M135i M140i M235i M240i 335i 340i 435i 440i, cradle front mounting bush, rear carrier front position insert, fast road bushings, OE 33316792509 replacement, PFR5-1920 Powerflex insert.