Powerflex Engine Mount Insert Kit for BMW X4 (G02) 2018+ - PFF5-4020 Yellow 70A Polyurethane Performance Bushes

BMW X4 G02 Motor Mount Insert Set - PFF5-4020 Yellow Poly Bush Upgrade

Give your BMW X4 G02 a tighter, more precise feel with the Powerflex PFF5-4020 motor mount insert set. These Yellow 70A Shore polyurethane inserts support the factory mounts by filling the voided areas, controlling engine rock under acceleration, gear changes and braking. Ideal for fast-road builds and daily-driven cars that want sharper response without the harshness of solid mounts.

What you will feel

• Cleaner traction and torque delivery as the powertrain is better restrained
• Snappier throttle pick up and a more connected shift feel
• Improved stability on and off throttle with reduced drivetrain shunt
• Helps protect OE mounts by limiting extreme movement
• Only a mild increase in vibration at idle for most vehicles
• Quick install with the mounts left in situ, a true driveway friendly upgrade

Why enthusiasts choose Powerflex Yellow 70A

• Balanced fast-road compound that curbs movement without going overly harsh
• Precision moulded polyurethane that resists oil, heat and ageing far better than rubber
• Sits neatly inside the original mount pockets for a factory-like fit
• Durable performance for tuned road cars used year round

Fitment and part details

• Vehicle suitability: BMW X4 G02, 2018 onwards
• Part number: PFF5-4020
• Pack contents: 2 insert pieces
• Diagram reference: 21
• Replaces OE numbers: 22112284817, 22112284818

Real world feedback

Fitted by us on customer BMW platforms and on our own builds, this insert set consistently delivers a more planted drivetrain, crisper response and smoother shifts, with only a small increase in idle buzz. A cost effective way to tame drivetrain movement without committing to full race mounts.

NVH guidance

Increasing stiffness between the engine and subframe can add a touch of extra vibration, typically most noticeable at idle. The 70A compound offers an excellent road-biased compromise for spirited use.

Track focused option

For dedicated circuit and motorsport builds, Powerflex Black Series uses a firmer 95A compound for maximum control of mount deflection. Choose this only if outright stiffness is the priority.

Professional installation

Want it fitted by specialists who know these cars inside out? Book with MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

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