Bilstein 21-030246 Suspension Strut Cartridge - Front

Bilstein B4 OE Replacement Suspension Strut Cartridge Overview

The Bilstein B4 OE Replacement Suspension Strut Cartridge 21-030246 is engineered to restore the original ride quality and handling characteristics of your BMW 525i or 535i. Designed as a direct replacement, this suspension strut cartridge offers reliable performance with a focus on durability and consistent damping.

• Direct OE replacement for BMW 525i and 535i models
• Twintube internal design for balanced ride comfort and control
• Black paint finish for corrosion resistance
• Base cup lower mount and stem upper mount for precise fitment
• Part number 21-030246 ensures exact match to original equipment

Detailed Product Features and Specifications

This Bilstein shock absorber features a twintube internal design, which provides a smooth and controlled damping experience suitable for daily driving conditions. The black paint finish offers protection against corrosion, extending the service life of the strut cartridge. The lower mount uses a base cup design, while the upper mount is a stem type, matching the original equipment specifications for BMW 525i and 535i models. This ensures straightforward installation and proper alignment with your vehicle's suspension system.

About the B4 OE Replacement Product Line

The B4 OE Replacement line from Bilstein is developed to meet or exceed original equipment standards. This product line focuses on restoring the factory ride and handling characteristics without altering the vehicle’s suspension geometry. The B4 series is ideal for drivers seeking a reliable and durable replacement that maintains the original driving experience of their BMW 525i or 535i.

Common Applications and Problem Solving

• Restores original ride comfort and handling performance
• Replaces worn or leaking suspension strut cartridges
• Eliminates excessive bouncing or poor damping response
• Addresses uneven tire wear caused by faulty struts
• Improves vehicle stability and control during cornering

Installation Notes and Tips

When installing the Bilstein 21-030246 suspension strut cartridge, ensure compatibility with your BMW 525i or 535i model year. The base cup lower mount and stem upper mount require proper alignment to avoid premature wear. It is recommended to inspect related suspension components during installation and replace any worn parts to maintain optimal performance.

Quality Assurance and Warranty

Bilstein manufactures the B4 OE Replacement suspension strut cartridges to meet strict quality standards. While specific warranty details are not provided here, Bilstein products typically come with a limited warranty covering defects in materials and workmanship. Refer to official Bilstein documentation for exact warranty terms related to part number 21-030246.