Bilstein 21-030390 Suspension Strut Cartridge - Front

Reliable Suspension Strut Cartridge for Audi Vehicles

The Bilstein B4 OE Replacement Suspension Strut Cartridge 21-030390 offers a direct-fit solution designed specifically for various Audi models. Engineered to restore original ride comfort and handling, this strut cartridge is ideal for maintaining your vehicle's suspension performance.

• Direct replacement suspension strut cartridge for Audi models
• Black paint finish for corrosion resistance
• Twintube internal design for consistent damping
• Lower mount type: housing for secure installation
• Upper mount type: stem for precise fitment
• Boot not included

About the Bilstein B4 OE Replacement Product Line

The B4 OE Replacement line by Bilstein is engineered to meet or exceed original equipment specifications. This product line focuses on restoring the original driving characteristics of your Audi by using OE-quality components and designs. The B4 series is ideal for drivers seeking a reliable and durable suspension upgrade that matches factory performance without modification.

Product Details and Features

The Bilstein 21-030390 suspension strut cartridge features a twintube internal design, which provides consistent damping and improved ride quality. The black paint finish offers protection against corrosion, extending the service life of the strut. The lower mount type is housing, ensuring a secure and stable connection to the suspension assembly, while the upper mount type is stem, designed for precise fitment in compatible Audi models. Note that this strut cartridge does not include a boot.

Compatible Audi Models and Applications

• Compatible with Audi 100 and 100 Quattro
• Fits Audi 200 and 200 Quattro
• Suitable for Audi 5000 Quattro
• Designed for Audi A6 and A6 Quattro
• Compatible with Audi S6 and V8 Quattro

Common Suspension Issues Addressed

• Worn or leaking original strut cartridges causing poor ride quality
• Reduced vehicle stability and handling performance
• Uneven tire wear due to suspension component degradation
• Excessive body roll or noise from faulty struts
• Restoring factory suspension feel after component failure

Installation Notes and Tips

Installation of the Bilstein 21-030390 suspension strut cartridge requires proper tools and knowledge of suspension systems. Ensure the vehicle is securely lifted and supported before removal of the old strut cartridge. Verify compatibility with your specific Audi model and year. Since the boot is not included, inspect the existing boot for damage and replace if necessary to protect the strut cartridge. Follow manufacturer torque specifications for mounting hardware.

Quality Assurance and Warranty

Bilstein manufactures the 21-030390 suspension strut cartridge to meet OE standards, ensuring reliable performance and durability. The B4 OE Replacement line is designed for consistent quality and fitment. Warranty details should be confirmed with the supplier or manufacturer, as coverage may vary.