Bilstein 21-030444 Suspension Strut Cartridge - Front

Bilstein B4 OE Replacement Suspension Strut Cartridge Overview

The Bilstein shock absorbers B4 OE Replacement suspension strut cartridge (part number 21-030444) is engineered for precise fitment on select Audi models. Designed to restore original ride comfort and handling, this strut cartridge is a reliable choice for maintaining your vehicle's suspension performance.

• Compatible with Audi 80, 80 Quattro, 90, 90 Quattro, Cabriolet, Coupe Quattro, and Quattro models
• Part number 21-030444 ensures exact replacement fit
• Black paint finish for corrosion resistance
• Twintube internal design for consistent damping
• Lower mount type: housing; upper mount type: stem
• Boot not included

Product Line Details: B4 OE Replacement

The B4 OE Replacement line by Bilstein focuses on delivering suspension components that meet original equipment specifications. This ensures that the 21-030444 suspension strut cartridge provides the same performance and durability as the factory-installed part, making it suitable for drivers seeking a direct replacement without modifying their vehicle's suspension setup.

Technical Description of the Suspension Strut Cartridge

This Bilstein suspension strut cartridge features a twintube internal design, which offers reliable damping characteristics suitable for everyday driving conditions. The black paint finish helps protect the strut from corrosion, extending its service life. The lower mount is designed as a housing type, while the upper mount uses a stem configuration, matching the original suspension geometry of compatible Audi models. Note that this strut cartridge does not include a boot.

Common Applications and Problem Solving

• Restores original ride comfort and handling on Audi 80 and 90 series vehicles
• Replaces worn or leaking suspension strut cartridges
• Addresses uneven tire wear caused by faulty damping
• Eliminates excessive body roll and instability during cornering
• Improves vehicle control and braking response

Installation Notes and Tips

When installing the Bilstein 21-030444 suspension strut cartridge, ensure 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. Proper torque specifications should be followed for both the housing lower mount and stem upper mount to maintain suspension integrity.

Quality Assurance and Warranty

Bilstein manufactures the B4 OE Replacement suspension strut cartridge to meet original equipment standards, ensuring consistent quality and durability. While specific warranty details are not provided here, Bilstein products typically come with manufacturer-backed warranties covering defects in materials and workmanship.