KYB 344487 Shock Absorber - Rear

KYB Excel-G Rear Shock Absorber for BMW X3

The KYB Excel-G 344487 is a rear suspension shock absorber built to restore original ride control, stability, and steering response on select BMW X3 models. It is an OE-style replacement for drivers who want factory-correct damping performance without changing the vehicle’s intended handling balance.

Compatible with 2004-2010 BMW X3 rear applications, this KYB Excel-G shock absorber is assembled on KYB OE production lines and calibrated to return the suspension to designed performance. The 344487 is a practical choice for BMW X3 rear shock replacement when ride quality, braking stability, and lane-change response need to be brought back in line with factory expectations.

Key Features

• KYB recommended OEM replacement shock absorber
• Designed to restore the original control and handling of the BMW X3
• Nitrogen gas-charged twin-tube construction
• 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 design helps minimize flex and maintain alignment
• Internal anti-rollover spring included
• Rear position application for select BMW X3 models

Product Details

The KYB Excel-G line is built around restoring the vehicle’s original suspension behavior rather than altering it. For the BMW X3, part number 344487 uses OE-quality components and factory-style calibration to support consistent damping at the rear axle. This helps maintain the suspension’s relationship with the brakes, tires, and electronic safety systems, which rely on the vehicle operating as engineered. This part cross-references Monroe Shocks & Struts 39107 for the same application.

Common Issues This Part Can Address

• Excessive rear-end bounce after bumps
• Reduced stability during braking or lane changes
• Uneven or unsettled rear suspension response
• Loss of steering precision caused by worn rear damping
• Suspension movement that no longer matches factory ride control

Installation Notes and Tips

Fits 2004-2010 BMW X3, rear. Verify the lower mount type E2(12X39.5) and upper mount type S1 before installation. Additional components may be required depending on the vehicle’s current suspension condition. Compressed length is 17.4, extended length is 24.21, and stroke length is 6.81. The internal anti-rollover spring may make the extended length appear shorter during handling.

Quality Assurance

KYB is a major OE supplier of shocks and struts, and the Excel-G line is produced on the same KYB OE assembly lines using OE-quality components. Part number 344487 is built to OE-style standards for consistent rear suspension performance on the BMW X3.