Powerflex Rear Diff Rear Mounting Bush PFR5-726 for BMW 6 Series E63/E64 2003-2010 - Polyurethane Differential Mount - Replaces OE 33176770825

Uprated Poly Bush for BMW 6 Series E63 E64 Rear Final Drive Rear Mount

Brand: Powerflex

Part number: PFR5-726

OE cross reference: 33176770825

Location on car: Rear final drive rear mount

Diagram ref: 26

Quantity in pack: 1 bush

Compatibility: BMW 6 Series E63 and E64, 2003 to 2010

Sharpen the rear end and stop unwanted movement

Restore control and tighten up the back of your 6 Series with this uprated polyurethane rear final drive mount. The factory rubber piece softens and splits with age, leading to clunks, diff shunt and a vague feel under throttle. Powerflex PFR5-726 replaces that tired rubber with durable polyurethane to stabilise the differential housing, keep the driveline located and deliver a more precise, confidence-inspiring drive on road and track.

Why this upgrade works

• Locks down the final drive to reduce shunt and wheel hop for cleaner launches and smoother gear changes
• Improves rear axle stability so the car feels planted in fast corners and under hard braking
• Helps maintain geometry for better tyre contact, traction and steering feedback
• Polyurethane resists oil, heat and ageing far better than standard rubber for long-term performance
• Direct swap for the stock mount with excellent control of noise, vibration and harshness versus worn OEM parts
• Covered by the Powerflex Lifetime Warranty for total peace of mind

Signs your original mount is past its best

• Thuds or knocks from the back of the car when pulling away
• Rear end looseness, tramlining or instability over bumps
• Inconsistent traction and uneven tyre wear
• Noticeable driveline lash on upshifts and downshifts

Swap to this poly bushing and you will feel a tighter, more connected rear axle with immediate improvement in driveability.

Fitment details

Purpose-built for BMW 6 Series E63 and E64 models from 2003 to 2010. Replaces OE reference 33176770825 at diagram position 26. Supplied as a single bush.

Tried, tested and loved by our customers

We have installed this exact component on many customer cars and our own builds. Feedback is consistently positive, with owners reporting crisper response, better grip out of bends and far less rear-end thump, without introducing unwanted harshness. It is a simple, effective upgrade that lasts.

Professional fitting available

Installation by a competent professional is recommended. For expert fitting, book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

What is included

• 1 x Powerflex PFR5-726 rear final drive rear mount bush
• Powerflex Lifetime Warranty

Search-friendly terms

BMW E63 E64 diff mount, BMW 6 Series rear final drive bush, polyurethane diff carrier bushing, rear axle differential support bush, uprated poly bush BMW 6 Series, performance rear diff mount, PFR5-726 bush, OE 33176770825 replacement, BMW 6 Series driveline mount, fast road diff mount E63, track day rear diff bushing, BMW coupe convertible E63 E64 rear axle mount, diff hanger bush, rear differential support mount, BMW 6 Series chassis upgrade.

Unsure about compatibility or placement on the diagram. Get in touch and our team will confirm before you order.