Bilstein 22-221490 Suspension Strut Assembly - Front

Bilstein B4 OE Replacement Suspension Strut Assembly Overview

The Bilstein shock absorbers part number 22-221490 is designed specifically for BMW 645Ci and 650i models. This suspension strut assembly offers a direct OE replacement solution, engineered to restore your vehicle's original ride comfort and handling characteristics.

• Brand: Bilstein
• Brand Line: B4 OE Replacement
• Part Number: 22-221490
• Category: Suspension > Shocks and Struts
• Part Type: Suspension Strut Assembly
• Internal Design: Twintube
• Finish: Black paint
• Lower Mount Type: Base cup
• Upper Mount Type: Stem
• Boot Included: No

About the B4 OE Replacement Product Line

The B4 OE Replacement line from Bilstein is engineered to meet or exceed original equipment specifications. This product line focuses on providing reliable, direct-fit suspension components that maintain the factory ride quality and handling balance. The B4 series is ideal for drivers seeking to replace worn or damaged struts on their BMW 645Ci or 650i without altering the vehicle’s original suspension dynamics.

Product Features and Technical Details

This Bilstein suspension strut assembly features a twintube internal design, which is common in OE applications and provides consistent damping performance. The black paint finish offers corrosion resistance and a clean appearance. The lower mount uses a base cup design, while the upper mount is a stem type, ensuring compatibility with the original mounting points on your BMW 645Ci and 650i. Note that this assembly does not include a boot.

Common Applications and Problem Solving

• Restores factory ride comfort and handling on BMW 645Ci and 650i models
• Replaces worn or leaking suspension struts causing poor vehicle stability
• Eliminates excessive body roll and uneven tire wear
• Addresses noise or vibration issues related to damaged strut assemblies
• Improves braking performance by maintaining proper suspension geometry

Installation Notes and Tips

Installation of the Bilstein 22-221490 suspension strut assembly should be performed by a qualified technician familiar with BMW suspension systems. Ensure all mounting points, including the base cup lower mount and stem upper mount, are properly aligned and torqued to manufacturer specifications. Since the boot is not included, inspect the existing boot and replace if necessary to protect the strut shaft from debris and extend service life.

Quality Assurance and Warranty

Bilstein manufactures the 22-221490 suspension strut assembly to meet OE standards, ensuring durability and consistent performance. The B4 OE Replacement line is backed by Bilstein’s quality control processes. Please refer to Bilstein’s official warranty policy for specific coverage details.