Powerflex Rear Anti-Roll Bar / Sway Bar / Stabiliser/Stabilizer Bush/Bushing Kit 18mm for BMW 6 Series E63 E64 2003-2010 – Polyurethane ARB Mounts Pair Polybush Upgrade – PFR5-4609-18 – Replaces 33552283073

Powerflex Rear Stabiliser Bar Bushing Kit 18 mm - BMW 6 Series E63 E64 2003-2010 - PFR5-4609-18

Sharpen your 6 Series with a simple, proven upgrade. These rear stabiliser bar mounting bushings from Powerflex replace tired factory rubber with tough polyurethane, tightening up the back end for crisper turn-in, flatter cornering and consistent road holding in all conditions. If you want confidence on fast A-roads and a more planted feel without compromising refinement, this is the go-to swap.

Part number: PFR5-4609-18

OE reference: 33552283073

Why this upgrade works

• Locks the bar-to-chassis location to reduce unwanted movement and roll
• Improves steering precision and rear axle stability under load
• Helps keep more tyre on the tarmac for better traction and braking
• Polyurethane resists oil, heat and ageing far better than rubber for long-term performance
• Excellent Noise, Vibration and Harshness control thanks to quality material formulation
• Backed by the Powerflex Lifetime Warranty

Fitment and specifications

• Vehicle: BMW 6 Series E63 E64 coupe and convertible, 2003 to 2010
• Location: Rear stabiliser bar to chassis mounts
• Bar diameter: 18 mm only - please measure your anti-roll bar before ordering
• Diagram reference: 14
• Contents: Pair of bushings for the rear bar mounts
• Direct replacement for OE number: 33552283073

Real-world results

We run these on our own builds and customers consistently report tighter, more predictable handling with improved confidence on both road and track. It is a high-value chassis upgrade that transforms feel without adding harshness.

When to replace your mounts

• Clunks or knocks from the rear over bumps
• Floaty or imprecise behaviour in quick direction changes
• Uneven tyre wear or instability under braking

Professional installation

Want it fitted by specialists? MJ Modifications is based in Warwickshire and can install this kit for you. Request a quote: info@mjmodifications.co.uk.

What you receive

• 1 x pair of genuine Powerflex rear stabiliser bar mounting bushings
• Part number PFR5-4609-18
• Powerflex Lifetime Warranty

Search-friendly terms

BMW E63 E64 rear stabiliser bushing kit 18 mm, rear sway bar mount inserts BMW 6 Series, poly rear bar to chassis bushings, suspension polybush upgrade BMW 6er 2003-2010, BMW 6 Series rear bar mounts 18mm, performance suspension bushings UK, direct fit polyurethane mounts PFR5-4609-18, replaces OE 33552283073.

Order today and give your BMW 6 Series the control, grip and stability it deserves.