Powerflex PFR5-4026 Rear Differential Mount Bush/Bushing for BMW M4 F82 F83 – Polyurethane Final Drive Rear Position with Support Washer – Diff Mount Upgrade & Replacement | 4 Series M4 Rear Axle Driveline Bush | OE 33177852495

Powerflex PFR5-4026 Rear Final Drive Rear Position Mount Bush for BMW M4 F82 F83

Transform rear-end control and power delivery with the Powerflex PFR5-4026 rear final drive mount for the BMW M4 F82 and F83. This uprated polyurethane bushing replaces the soft factory rubber at the rear position of the final drive, tightening up the driveline and keeping the unit correctly located under load. An integrated support washer adds reinforcement during hard acceleration, helping you put torque to the tarmac with confidence.

What you will feel

• Cleaner throttle response and crisper gear changes as driveline movement is reduced
• More composed rear axle behaviour when accelerating, cornering and braking
• Improved traction out of bends with better control of wheel hop and squat
• Consistent geometry for fast-road and track-day use
• Durable polyurethane construction that outlasts ageing OEM rubber
• Powerflex Lifetime Warranty for peace of mind

Why upgrade this mount

As factory rubber softens, the final drive can shift on its mounts, causing vagueness, shunt and instability that you notice as a lack of precision at the back of the car. The Powerflex polyurethane solution controls that movement while maintaining road comfort, so you get sharper response and stability without an unwanted increase in harshness.

Key details

• Part number: PFR5-4026
• Vehicle: BMW M4 F82 Coupe and F83 Convertible
• Position: Rear location of the final drive on the rear axle carrier
• Includes: 1 x polyurethane bush with integrated support washer
• Diagram reference: 22
• OE cross-reference: 33177852495

Proven by us

We have installed this bush on our own builds and a wide range of customer M4s. Feedback is consistently positive, with tighter rear-end control, improved traction and a more connected feel all round.

Fitting and support

Direct swap for the original rubber mount. Professional installation recommended. For fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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Buy with confidence

In stock and ready to ship. Upgrade your M4 with a durable, performance-focused mount that delivers real-world gains in stability and traction.