BMW 1 Series F40 (2018+) Powerflex PFF5-1321 Upper Engine/Motor Mount Insert Bush - Polyurethane Top Torque Mount Upgrade, Yellow 70A - Reduces Wheel Hop & Improves Shift Feel

Part Number: PFF5-1321

Want crisper gear changes, better traction and a more planted front end from your BMW platform without turning your daily into a rattle box? This polyurethane motor mount insert is the smart, cost-effective drivetrain upgrade that supports the original top mount by filling the factory voids with a precision rod-style design in Yellow 70A material. It limits excess engine movement, helps curb wheel hop and gives a more connected feel on the road while maintaining everyday comfort.

Perfect for cars running stock power or mild tuning where the standard rubber mount can start to show its age, this insert stabilises the powertrain under acceleration and deceleration. The result is a more settled transmission response, cleaner upshifts and downshifts, and improved throttle-to-tyre delivery on bumpy or broken surfaces.

Why enthusiasts choose this upgrade

• Reduces engine rock for sharper shift feel and smoother engagement
• Helps tame wheel hop for better traction off the line and out of corners
• Supports the OE mount to prolong its life by limiting excessive movement
• Balanced NVH control thanks to compliant yet durable Yellow 70A polyurethane
• Road and fast-road ready for confident everyday performance

Technical highlights

• Material: Yellow 70A polyurethane insert with effective rod-style void-fill design
• Quantity in pack: 1 insert
• Diagram reference: 21
• Replaces OE bush part numbers: 22116853446, 22116875630 or 22116875628, 22118743621

Made to fit into the factory top mount voids, this uprated insert increases rigidity where it matters while keeping compliance for daily road use. Expect tighter drivetrain control and a more precise feel without the harshness associated with solid mounts.

We use this upgrade on customer builds and feedback has been consistently positive, especially around improved shift precision and reduced hop under hard acceleration.

Compatibility

Designed for the BMW 1 Series on the F40 platform from 2018 onwards. If you are unsure about fitment, contact us and we will confirm before you buy.

Fitting service

Prefer professional installation? MJ Modifications in Warwickshire can fit this insert for you. Request a fitting quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW engine mount bush, motor mount insert, torque mount insert, top mount bush, polyurethane engine bushing, poly bush upgrade, drivetrain stabiliser, engine steady insert, fast road mount, BMW F40 mount upgrade, gearbox mount support, shift improvement, wheel hop reduction.