Bilstein B6 Rear Shock/Strut/Shocker 24-170659 for BMW Z4 E89 2009-2016 | Monotube Gas Pressure Damper | Heavy Duty OE Replacement Fast Road Upgrade | Stock Height | Fits sDrive 18i 20i 23i 28i 30i 35i 35is Roadster

Bilstein B6 Rear Damper 24-170659 for BMW Z4 E89 2009 to 2016

Transform the rear end of your E89 Z4 with this heavy duty, gas-charged monotube rear suspension unit. Bilstein part number 24-170659 is a direct-fit rear damper engineered for sharp control, confident road holding and long-term reliability while keeping stock ride height and comfort. Ideal when your factory rear shock has gone soft or you want a fast-road upgrade without changing springs.

We run B6 on our own cars and for customer projects and it consistently delivers. Expect tighter body control, calmer high-speed stability, improved traction out of bends and a composed ride on British roads. It is the go-to choice for Z4 owners who want an OEM-quality replacement that feels genuinely uprated.

Why this B6 rear damper is a smart upgrade

• Gas-charged monotube design for crisp damping response and fade-resistant performance
• Direct-fit rear axle unit that works perfectly with standard series springs
• Uprated control for fast road driving without sacrificing daily comfort
• Consistent handling and grip on B roads, motorways and uneven surfaces
• Engineered to outlast tired factory shocks under spirited use and touring loads
• Developed and validated by Bilstein engineers for the E89 chassis

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Technical information

• Position: Rear axle
• Design: Monotube, gas pressure
• Mounting: Lower eye, upper pin
• Spring seat: Does not carry a spring
• Intended use: Works with factory springs, no lowering required

Vehicle fitment

BMW Z Series

• Z4 Roadster E89 02.2009 to 08.2016
  • sDrive 18i
  • sDrive 20i
  • sDrive 23i
  • sDrive 28i
  • sDrive 30i
  • sDrive 35i
  • sDrive 35is

What you will feel on the road

Sharper turn-in, flatter cornering and better composure over crests and compressions. Less float, more confidence and a clean, connected steering feel. If you want a rear shock that retains everyday comfort and transforms control, this B6 is the sweet spot for the E89 platform.

Fitting and setup

Professional installation recommended. MJ Modifications in Warwickshire offer expert fitting, geometry checks and advice on setup. Email info@mjmodifications.co.uk for a quote or to book. For best results, replace dampers in axle pairs.

Compatibility check before dispatch

We can confirm suitability before shipping. Provide your UK registration or the last 7 digits of your VIN at checkout and we will verify fitment.

Part numbers and identifiers

• Main reference: 24-170659
• Alternate reference: BILSTEIN-24-170659
• Manufacturer: Bilstein
• EAN: 4025258649661
• UPC: 651860649269

In summary

For Z4 E89 owners searching for a sturdier, sportier rear suspension solution that fits like factory, the Bilstein B6 24-170659 is the proven choice. A direct-fit rear damper that elevates control, grip and confidence while keeping comfort intact.