Bilstein 21-030505 Front B4 OE Strut Insert for 82-94 BMW 3 Series E30 (Front)

Vehicle Fitment

• 1982-1994 BMW 3 Series E30 (Front strut insert, various engines including 316i, 318i, 318is, 320i, 323i, 324td, 325i, 325es, 325is)
• 1988-1991 BMW Z1 2.5 (Front strut insert, standard chassis)

Features

• OE-replacement front strut insert engineered to restore original ride quality
• Bilstein B4 Series twin-tube gas-pressure design for consistent damping and handling
• Direct replacement for worn-out original strut cartridges
• Precision engineered for stable road control and comfort
• Durable black corrosion-resistant finish for extended service life
• SOLD INDIVIDUALLY - replace in matched pairs for balanced performance
• Upper stem and lower housing mount for secure fitment
• Ideal for restoring factory suspension feel on classic BMW models

Specifications

• Brand: Bilstein B4 OE Replacement
• Position: Front strut insert (left or right interchangeable)
• Design: Twin-tube gas-pressure strut cartridge
• Upper Mount Type: Stem
• Lower Mount Type: Housing
• Extended Length: ~24.21" (615 mm)
• Collapsed Length: ~17.44" (443 mm)
• Finish: Black paint
• Spring Seat: Not included
• Boot: Not included

Included Components

• 1x Bilstein 21-030505 front strut insert (single unit)

Product Description

The Bilstein 21-030505 B4 OE Replacement front strut insert is engineered to restore the original ride quality, handling balance, and suspension performance on supported classic BMW vehicles. As a direct fit replacement strut cartridge, it installs into the existing front strut housing and works with factory springs and mounts. The twin-tube gas-pressure design delivers reliable damping and smooth response across diverse driving conditions while maintaining the chassis dynamics these vehicles were designed for.

This strut insert fits a wide range of BMW 3 Series E30 models produced from 1982 through 1994, including sedans, coupes, convertibles, and touring body styles with various engine options. It is also compatible with the BMW Z1 2.5 (1988-1991) when equipped with the standard chassis. Designed for both driver and passenger side positions, this insert is sold individually, and replacing both sides together ensures balanced performance and ride quality.