KYB 3440053 Shock Absorber - Rear

KYB Excel-G Rear Shock Absorber

The KYB Excel-G 3440053 is a rear suspension shock absorber built to restore original ride control, stability, and handling response. It is a direct-fit OE-style replacement for select Cadillac ATS and Cadillac CTS applications, with vehicle-specific damping calibrated to return the suspension to factory-designed performance.

KYB Excel-G is KYB’s OEA-style replacement line, produced on the same OE assembly lines and using OE-quality components. For drivers searching for a rear shock for a 2013-2019 Cadillac ATS or 2014-2019 Cadillac CTS, part number 3440053 provides a practical replacement focused on control rather than changing the vehicle’s ride character.

Key Features

• KYB recommended OEM replacement shock
• 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
• Includes dust cover, B-stop, and R-stop
• Lower mount type: E2(12X48); upper mount type: S1

Product Line Details

The Excel-G line is engineered to restore the suspension’s original operating characteristics. It is calibrated for factory-style ride control, making it a suitable choice when the goal is to replace a worn rear shock without altering the vehicle’s intended handling balance. This KYB shock absorber is built for Cadillac sedan applications where consistent damping and stable body control matter.

Fitment

• Fits 2019 Cadillac ATS, Rear. Recommended OEM Replacement; Excel-G.
• Fits 2014-2019 Cadillac CTS, Rear. Recommended OEM Replacement; (Excecpt Electronic and Performance Suspensions); Excel-G.
• Fits 2013-2018 Cadillac ATS, Rear. Replace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G.

This part cross-references Monroe Shocks & Struts (e.g., 5539, 5664) for the same application.

Common Issues This Part Can Address

• Excessive rear bounce after bumps
• Reduced stability during lane changes
• Loose or unsettled rear suspension feel
• Uneven tire contact caused by worn damping
• Delayed body control during braking and cornering

Installation Notes and Tips

Verify rear suspension configuration before ordering, especially on Cadillac CTS models with electronic or performance suspension systems, which are excluded from this application. Follow manufacturer instructions for the 2013-2018 Cadillac ATS rear suspension strut and coil spring assembly, and inspect related mounts and hardware for wear before installation. Confirm compressed length, extended length, and mount types against the original part to ensure proper replacement.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers, and Excel-G is assembled on KYB OE production lines using OE-quality components. The design focuses on restoring original ride control and helping maintain the suspension performance that electronic safety systems expect from the vehicle’s factory setup.