Powerflex Black Series PFR5-4625BLK 95A Polyurethane Rear Differential Front Bush/Mount for BMW E46 3 Series & Z4 E85 E86 (xi/xd) | Final Drive Diff Carrier Bushing Upgrade | Replaces 33176768655 33176770788

PFR5-4625BLK 95A Polyurethane Front Mounting Bush for Rear Final Drive

Transform the rear end of your BMW with this Powerflex Black Series front mounting bush for the rear final drive. Engineered from a 95 Shore A polyurethane compound, this motorsport-focused bushing controls differential movement for crisper handling, stronger traction and cleaner power delivery. Perfect for E46 and Z4 E85 E86 owners seeking a serious differential mount upgrade for fast road, track and competition use.

We run these bushes on our own builds and customer cars, and the feedback is consistently excellent. Expect a tighter rear axle, reduced wheel hop under hard launches, improved stability on corner exit and a more direct connection to the drivetrain. If your original rubber mount has softened, split or perished, this is the durable, performance-led replacement that keeps geometry where it should be.

Why enthusiasts choose this upgrade

• High-durometer 95A polyurethane for maximum control of diff movement
• Sharper throttle response and reduced axle tramp on acceleration
• More precise rear-end feel and improved traction in wet and dry conditions
• Resistant to oil, heat and ageing compared with OEM rubber
• Ideal for fast-road, track day, race and rally applications

What you receive

• 2 x polyurethane bushes
• 2 bushes required per vehicle

Fitment

• BMW 3 Series E46: Compact, Saloon, Touring, Coupé, Convertible
• BMW E46 xi and xd all-wheel-drive variants
• BMW Z4 E85 and E86, model years 2003 to 2009

OE cross references

• 33176768655
• 33176770788

Part number

PFR5-4625BLK

Performance benefits

• Controls torque reaction at the rear final drive housing
• Improves gearshift feel by stabilising the driveline under load
• Enhances cornering consistency by keeping alignment stable
• Long-life solution for tuned and standard power levels

Ideal search terms

BMW E46 differential mount upgrade. Z4 E85 E86 final drive mount. E46 rear axle bushing. BMW 3 Series diff carrier bush. Polyurethane diff mount 95A. BMW Z4 E85 diff bushing replacement. E46 drivetrain mount. BMW differential front mounting bush. Performance rear diff bush BMW. Powerflex Black Series PFR5-4625BLK.

Installation

Download the official fitment guide

Prefer professional fitting. Book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a supply and fit quote.

Compatibility check

We confirm fitment before dispatch. For UK vehicles, provide your registration number at checkout. For non-UK cars, include the last 7 characters of the VIN.

Manufactured by

Powerflex

Diagram

Reference 25

Why buy from us

Trusted by drivers who want real results, this upgrade is a proven way to firm up the rear drivetrain on E46 and Z4 platforms. Our customers love the immediate improvement in response and stability, and we do too. Add to basket with confidence and unlock a more planted, predictable drive.