KYB 343330 Shock Absorber - Rear

KYB Excel-G Rear Shock for BMW Z3

The KYB Excel-G 343330 is a rear suspension shock absorber for the 1996-2002 BMW Z3. It is built to restore original ride control, steering response, and body stability while maintaining OE-style handling characteristics.

As part of the KYB Excel-G line, this shock is calibrated to return the vehicle to its designed performance rather than alter it. The 343330 uses a nitrogen gas-charged, twin-tube design and OE-quality components assembled on KYB production lines used for original equipment applications.

Key Features

• Recommended OEM replacement strut/shock for the BMW Z3
• Restores designed control and handling for rear suspension service
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Supports proper operation of electronic safety systems by maintaining suspension behavior as engineered
• Strong strut body and bracket construction helps minimize flex and maintain alignment
• Part number 343330

Detailed Description

KYB Excel-G 343330 is an OE-style rear shock absorber for BMW Z3 models from 1996-2002, excluding Sport Suspension applications. It is designed for drivers replacing worn suspension components on a BMW Z3 rear axle and wanting factory-like ride control, braking stability, and lane-change response. The Excel-G line is built to match original damping characteristics, making it a practical choice for restoring predictable suspension performance.

This part cross-references Monroe Shocks & Struts (e.g., 5999) for the same application. The KYB 343330 measures 13.19 inches compressed, 21.02 inches extended, and 7.83 inches of stroke, with lower mount type E2(12X50.7) and upper mount type S1.

What It Helps Address

• Excessive rear-end bounce after bumps
• Reduced stability during braking or lane changes
• Uneven tire contact caused by worn damping
• Suspension noise or vibration related to aged shock components
• Loss of original BMW Z3 ride control at the rear

Installation Notes and Tips

Fits 1996-2002 BMW Z3, rear. Confirm the vehicle is not equipped with Sport Suspension before ordering. KYB recommends replacing the strut mounts with SM5013 to reduce noise and vibration, and adding a KYB strut boot, SB108, to help protect the unit from dirt, debris, and salt. Verify mount style and dimensions against the existing part before installation.

Quality Assurance

KYB is a major OE shock and strut supplier, and the Excel-G line is produced on KYB OE assembly lines using OE-quality components. The 343330 is classified as an OEA-style aftermarket replacement for restoring original suspension performance on the BMW Z3.