Powerflex PFR5-4618 Rear Suspension Arm Outer Bushes/Bushings (Pair) Polyurethane Polybush Kit for BMW Z4 E89 2009–2016 – Rear Lower Control/Wishbone/Lateral Arm/Hub/Knuckle – Replaces BMW OE 33326771828

Powerflex PFR5-4618 Rear Suspension Arm Outer Polybush Kit for BMW Z4 E89

Part number: PFR5-4618

Vehicle: BMW Z4 E89, 2009 onwards

OE cross reference: 33326771828

Diagram ref: 18

Contents: 2 bushes

Transform the rear end precision of your BMW roadster with the Powerflex PFR5-4618 outer bush kit for the rear suspension arm. This performance urethane upgrade replaces tired factory rubber that allows unwanted movement, delivering crisp turn in, stable geometry under load and a planted, confidence inspiring drive on fast road and track. If you are chasing sharper handling and consistent alignment, this is the go to Z4 E89 suspension refresh.

Why this upgrade works

• Locks down rear wishbone location for more accurate toe and camber control when cornering and braking.
• Improves steering response and rear end stability, reducing squirm and mid corner corrections.
• Helps reduce uneven tyre wear by maintaining set up and alignment.
• Durable polyurethane resists oil, road salt and ageing far better than rubber for long term performance.
• Excellent NVH control in daily use with a sportier, more connected feel.
• Backed by the Powerflex Lifetime Warranty for peace of mind.

What you are fitting

• 2 x Powerflex rear wishbone outer bushes, part number PFR5-4618.
• Direct swap for the original BMW item at the rear arm outer position.
• Designed for the Z4 E89 platform 2009 on, replacing BMW part 33326771828.

Proven on our builds

We have installed these on our own cars and customer vehicles with consistently positive feedback. Expect a tighter rear axle, better traction on bumpy roads and a more precise drive without harshness. A simple change that makes your Z4 feel sorted.

Fitting and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Ideal if you are experiencing

• Rear end vagueness or a wandering feel.
• Persistent alignment changes or toe creep.
• Feathered or accelerated tyre wear on the rear axle.
• Instability under heavy braking or fast direction changes.

Search friendly terms

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