Bilstein 19-158983 B4 OE Rear Shock for 2003-2008 BMW Z4 E85/E86

Vehicle Fitment

• 2003-2008 BMW Z4 (E85 Roadster, Rear Standard Suspension) - Rear
• 2006-2008 BMW Z4 (E86 Coupe, Rear Standard Suspension) - Rear

Features

• Bilstein B4 OE Replacement rear shock absorber
• Twin-tube gas-pressure design restores original ride quality
• Direct bolt-on fit for OE replacement performance
• Provides consistent damping across varied road conditions
• Improved handling and stability over worn factory units
• Durable black finish resists corrosion
• Designed to match factory ride comfort and safety levels
• Bilateral fit - can be installed on driver or passenger side

Specifications

• Brand: Bilstein
• Part Number: 19-158983
• Series: B4 OE Replacement
• Mounting Position: Rear
• Design: Twin-tube gas-pressure shock absorber
• Upper Mount: Stem
• Lower Mount: Eyelet (~12 mm)
• Sold: Individually

Included Components

• 1x Rear B4 OE Replacement shock absorber (black finish)

Product Description

The **Bilstein 19-158983** B4 OE Replacement rear shock is engineered for drivers who want to restore the original ride comfort and handling characteristics of their 2003-2008 BMW Z4 (both E85 Roadster and E86 Coupe) with standard suspension. This twin-tube gas-pressure shock absorber delivers consistent damping performance and helps maintain vehicle stability and control by managing suspension movement effectively - especially when replacing worn or aged factory shocks.

As a direct bolt-on OE replacement component, the Bilstein B4 series matches the ride quality, safety, and comfort expected from original equipment while offering the durability and quality that Bilstein is known for. Sold individually and finished in a protective black coating, this rear shock is suitable for both driver and passenger side installs and maintains the original suspension characteristics when paired with standard ride height springs.