Bilstein 21-030512 Front B4 OE Strut Cartridge for 1982-1988 BMW 5-Series E28

Vehicle Fitment

• 1982-1988 BMW 528e (E28, RWD, I6)
• 1983-1984 BMW 533i (E28, RWD, I6)
• 1985-1988 BMW 535i (E28/E24, RWD, I6)
• 1988 BMW 535is (E28, RWD, I6)
• 1983-1984 BMW 633CSi (E24, RWD, I6)
• 1985-1989 BMW 635CSi (E24, RWD, I6)

Features

• B4 OE-style twin-tube gas-pressure strut cartridge
• Restores original ride comfort and handling performance
• High power reserves ensure consistent stability
• Designed for factory suspension - no lowering springs
• Non-adjustable damping preserves OEM characteristics
• Durable finish for long-lasting corrosion protection
• Limited lifetime warranty against defects
• Easy bolt-in installation with factory hardware

Specifications

• Position: Front axle
• Extended Length: 25.00 inches
• Compressed Length: 17.99 inches
• Travel: 7.01 inches
• Upper Mount: Stem
• Lower Mount: Housing
• Internal Design: Twin-tube
• Finish: Black paint
• Boot Included: No

Included Components

• 1x Bilstein 21-030512 Front Strut Cartridge
• All necessary washers, bushings, reservoir clamps, and nuts

Product Description

The Bilstein 21-030512 B4 OE Strut Cartridge is engineered to restore the original ride comfort and handling of classic BMW 5-Series E28 and 6-Series E24 models. With its twin-tube gas-pressure design and OEM-style damping, it provides consistent stability and improves driving dynamics without altering factory suspension qualities :contentReference[oaicite:1]{index=1}.

Measuring 25" extended and 17.99" compressed (7.01" travel), it easily bolts into place using existing hardware. This strut is specifically tuned for the front RWD suspension on models equipped with inline-6 engines. Installation is straightforward, and no modifications are required - ideal for restoration or maintenance with minimal effort :contentReference[oaicite:2]{index=2}.

Backed by Bilstein's limited lifetime warranty and built to meet or exceed OEM standards, the 21-030512 strut cartridge delivers reliable, long-term performance. Perfect for enthusiasts maintaining the classic driving experience of their BMW E28/E24 vehicles :contentReference[oaicite:3]{index=3}.