KYB 365043 Suspension Strut Cartridge - Front

KYB Excel-G Front Strut Cartridge

The KYB Excel-G 365043 is a front suspension strut cartridge engineered to restore original ride control, stability, and steering response. It is a direct-fit OE-style replacement for select BMW applications, including 1982-1989 BMW 528e, 533i, 535i, 535is, and 635CSi front suspension service.

Built on KYB OE assembly lines, the Excel-G line is calibrated to return the vehicle to its designed handling balance rather than change suspension character. For BMW 635CSi and BMW 528e front strut replacement work, part number 365043 is a practical choice for restoring predictable body control and lane-change response.

Key Features

• KYB recommended OEM replacement gas cartridge
• Nitrogen gas-charged, twin-tube design
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket construction helps minimize flex and maintain alignment
• Designed to support electronic safety systems by restoring suspension behavior to factory intent
• Upper mount type: 12x1.25
• Compressed length: 17.91 in; extended length: 25.2 in; stroke length: 17.48 in

Detailed Description

KYB Excel-G struts are built for drivers who want OE-level suspension behavior after wear has reduced control and consistency. The 365043 front strut cartridge uses KYB’s OE-quality components and damping calibration to help restore the way the vehicle responds during braking, cornering, and quick lane changes. This makes it a strong fit for BMW E24 and E28 front suspension service where original handling feel matters.

This part cross-references Monroe Shocks & Struts 73998 for the same application. It is also a fitment match for Gabriel G44920 in the same front strut cartridge application.

What It Helps Address

• Excessive front-end bounce or float after suspension wear
• Reduced steering precision and slower response
• Nose dive during braking
• Uneven tire contact caused by weak damping
• Noise and vibration from worn strut components

Installation Notes and Tips

Fits 1985-1989 BMW 635CSi, front; 1982-1988 BMW 528e, front; 1988 BMW 535i, front; 1988 BMW 535is, front; 1985-1987 BMW 535i, front; and 1983-1984 BMW 533i, front. Notes include recommended OEM replacement, with exclusions for Bilstein-equipped vehicles and, on certain E28 applications, electronic adjustable suspension and M5-specific configurations.

KYB recommends replacing the strut mounts at the same time to reduce noise and vibration; KYB strut mount SM5053 is listed for this application. A KYB strut boot, part number SB105, can help protect the new strut from dirt, debris, and road salt.

Quality Assurance

KYB is a major OE supplier to new vehicle manufacturers, and the Excel-G line is produced on the same KYB assembly lines using OE-quality components. The 365043 is classified as an Original Equipment for the Aftermarket (OEA) replacement, with damping calibrated to restore factory-designed performance for BMW front suspension service.