Bilstein 11-305804 Rear Damper Protection Kit for BMW Z4 E85 and E86

Keep your Z4’s rear suspension working smoothly with this genuine Bilstein service kit. Bilstein part 11-305804 is engineered for the rear axle on BMW Z4 E85 Roadster and E86 Coupe models and shields the damper piston rod from grit, water and road salt, helping preserve seal integrity and ride quality over the long term. Ideal when refreshing suspension, changing rear shocks or carrying out a preventative maintenance service.

Why this Bilstein kit belongs on your Z4

• Authentic Bilstein component for precise rear axle fitment on Z4 E85 and E86
• High quality materials designed to resist cracking and splitting in UK conditions
• Helps prevent contamination, corrosion and premature wear on the damper rod
• Supports quiet, composed handling and consistent comfort
• Works perfectly alongside Bilstein dampers and OE replacement shocks

We have installed this rear damper protection kit on customer BMW Z4s and our own builds, and the results have been excellent. Owners love the tidy fit, the quality feel and the extra protection during daily use and spirited driving.

Fitting position

Rear axle

Vehicle applications

• BMW Z4 E85 Roadster 2002 to 2009
  • 2.0i, 2.2i, 2.5i, 2.5si, 3.0i, 3.0si
• BMW Z4 E86 Coupe 2006 to 2009
  • 3.0si

Check compatibility before dispatch

We will confirm fitment for your car before shipping. Add your UK registration or the last 7 characters of your VIN at checkout so we can verify that Bilstein 11-305804 is correct for your specific Z4.

Professional installation

Want it fitted right first time? Book expert fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Part identifiers

• Part number: 11-305804
• Manufacturer: Bilstein
• EAN: 4025258858636
• UPC: 651860866352

What people search for

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Also known as: rear strut protector, damper dust sleeve, rear shock gaiter, rear suspension bellows, shock rod shield for BMW Z4 E85 and E86.