Powerflex PFR5-725 Rear Axle Diff Front Mount Poly Bush/Bushing Kit (2) for BMW 6 Series E63/E64 2003-2010 - Differential Carrier/Final Drive Front Mount Upgrade - Replaces OE 33176767525

Powerflex PFR5-725 Rear Axle Differential Front Mount Bush Set for BMW 6 Series E63 E64 2003 to 2010

Give your BMW 6 Series a sharper, more planted feel with this Powerflex PFR5-725 front mount bush set for the rear differential. These uprated poly bushes replace the tired factory rubber that allows the differential to shift under load, causing vague handling, axle tramp and inconsistent traction. With Powerflex polyurethane, the differential is positively located, delivering tighter control, cleaner power delivery and confidence-inspiring stability on fast road use.

We have fitted these on our own cars and for many customers, and the feedback is consistent: crisper turn-in, reduced wheel hop off the line, better grip through bumpy corners and a more connected drive without the excessive noise or harshness you might expect from hard mounts. It is a proven upgrade for anyone refreshing an ageing rear end or chasing performance gains from their suspension and drivetrain.

Why choose these bushes

• Locks the front of the rear final drive in place to curb unwanted movement during acceleration and braking
• Improves traction, stability and steering precision for daily driving and spirited use
• Helps maintain consistent rear alignment to reduce irregular tyre wear
• Durable polyurethane resists oil, heat and road contaminants far better than OE rubber
• Cost-effective long-term solution compared with repeatedly replacing standard bushes
• Backed by the Powerflex Lifetime Warranty for peace of mind

What is included

• Quantity: 2 bushes
• Diagram reference: 25
• Powerflex part number: PFR5-725
• BMW OE cross-reference: 33176767525

Compatibility

BMW 6 Series E63 coupe and E64 convertible, model years 2003 to 2010. Fits the front mounting position of the rear differential housing as a direct replacement for the original rubber bush.

Real-world results

Installed by MJ Modifications across multiple customer vehicles, this upgrade consistently delivers a tighter rear end with improved grip and more predictable behaviour under throttle. Drivers report smoother launches, better composure over undulations and a more precise, confidence-inspiring chassis feel.

Installation

Direct replacement for the OEM items. Press tools are usually required, so professional fitting is recommended. For expert installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

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