Bilstein 21-030444 Suspension Strut Cartridge - Front

Bilstein B4 OE Replacement Front Strut Cartridge

The Bilstein B4 OE Replacement suspension strut cartridge is engineered to restore original ride quality and handling on select Audi applications. Built to meet or exceed OE standards, this front cartridge is a direct-fit solution for drivers who want factory-style performance with Bilstein quality.

Compatible with Audi 80, 90, Coupe Quattro, Quattro, and Cabriolet front suspension applications, part number 21-030444 is a practical OE-style replacement for worn front dampers. This Bilstein shock absorber cartridge uses a twintube internal design and a stem upper mount with housing lower mount for the specified fitments.

Key Features

• Bilstein B4 OE Replacement series
• Suspension strut cartridge for front applications
• Twintube internal design for OE-style ride characteristics
• Black paint finish
• Stem upper mount and housing lower mount
• No boot included
• Built to maintain original ride quality and handling balance

Detailed Description

Bilstein 21-030444 is a front suspension strut cartridge developed for Audi models that require an OE replacement damper. The B4 OE Replacement line focuses on preserving the vehicle’s original suspension feel while restoring control, stability, and response. For Audi 80 and 90 owners, as well as Audi Quattro and Cabriolet applications, this cartridge provides a direct replacement option for worn front struts without changing the factory driving character.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application. It also interchanges with OE-style references including 8A0 413 503 B and PNE-3044.

What It Helps Address

• Excessive front-end bounce after hitting bumps
• Reduced steering response and road control
• Uneven or unstable ride quality from worn struts
• Noisy or harsh suspension behavior from aging dampers
• Loss of factory ride feel on Audi 80, 90, Quattro, Coupe Quattro, or Cabriolet front suspension

Installation Notes and Tips

• Fits 1983-1985 Audi Quattro, front, 50mm outside strut diameter
• Fits 1988-1989 Audi 80, front, 50mm outside strut diameter
• Fits 1988-1989 Audi 80 Quattro, front, 50mm outside strut diameter
• Fits 1988-1989 Audi 90, front, 50mm outside strut diameter
• Fits 1988-1989 Audi 90 Quattro, front, 50mm outside strut diameter
• Fits 1990-1991 Audi 90, front
• Fits 1990-1991 Audi 90 Quattro, front
• Fits 1990-1991 Audi Coupe Quattro, front
• Fits 1990-1992 Audi 80, front, sport suspension
• Fits 1990-1992 Audi 80 Quattro, front
• Fits 1993-1995 Audi 90, front, standard or sport suspension
• Fits 1993-1995 Audi 90 Quattro, front
• Fits 1994-1998 Audi Cabriolet, front
• Verify strut diameter and mounting style before installation
• Boot is not included

Quality Assurance

Bilstein’s B4 OE Replacement line is engineered to meet or exceed OE standards, giving this front strut cartridge a factory-focused fit and performance profile for the listed Audi applications. Part number 21-030444 is built for consistent damping performance and dependable suspension restoration.