KYB 3440142 Suspension Shock Absorber - Rear

KYB Excel-G Rear Shock for Mazda CX-9

The KYB Excel-G shock absorber, part number 3440142, restores original ride control for the rear of select Mazda CX-9 models. Built on KYB OE assembly lines, this nitrogen gas-charged twin-tube shock uses OE-quality components to return factory-style stability, braking response, lane-change control, and handling.

Key Features

• Fits 2019-2023 Mazda CX-9, rear
• KYB Excel-G OEA replacement for original ride characteristics
• Nitrogen gas-charged, twin-tube shock absorber design
• Compressed length: 16.89 in; extended length: 24.78 in; stroke length: 7.89 in
• Lower mount type: E2 (14.2x46); upper mount type: S1 (8MM)
• Internal rebound spring included
• Part number 3440142 for direct catalog matching

Product Details

KYB Excel-G is engineered to restore the vehicle’s original suspension behavior rather than change it. For Mazda CX-9 rear suspension service, this shock absorber is calibrated to match OE performance targets and uses the same quality standards found in KYB’s global OEM production. If you are replacing worn rear shocks on a 2019-2023 Mazda CX-9, part number 3440142 provides a direct-fit solution focused on ride control and predictable handling. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive rear bounce after bumps
• Reduced stability during braking and lane changes
• Loose or unsettled rear-end handling
• Uneven ride control from worn shock absorbers
• Loss of factory-like suspension response on Mazda CX-9 rear applications

Installation Notes and Tips

Verify rear fitment by model year before installation: Fits 2019-2023 Mazda CX-9, rear. Inspect related suspension components, mounting points, and bushings for wear before replacing the shock. Confirm the lower E2 (14.2x46) and upper S1 (8MM) mount types match the vehicle’s original configuration. Part number 3440142 is intended for the rear position only.

Quality Assurance

KYB is a major OE shock and strut supplier, and Excel-G is produced on KYB OE assembly lines using OE-quality components. The Excel-G line is classified as OEA, indicating original-equipment-style replacement performance for the Mazda CX-9 rear shock application.