KYB SR4211 Suspension Strut and Coil Spring Assembly - Front

KYB Strut-Plus Front Strut Assembly

The KYB Strut-Plus SR4211 is a front suspension strut and coil spring assembly engineered to restore ride height, handling, and steering response. It is built for 2006-2011 Buick Lucerne and 2006-2011 Cadillac DTS front applications with the listed suspension configurations.

Key Features

• Complete front strut assembly from KYB, a trusted OEM-quality shocks and struts brand
• Includes a KYB Excel-G strut with application-specific damping valves
• Uses a stronger steel outer shell for added structural support
• High carbon steel coil spring is selected to help restore OE ride height
• Exact-fit, pre-assembled design for professional installation results
• Engineered to help vehicles equipped with electronic safety systems such as ESC and ABS
• Assembled in the USA

Product Details

KYB Strut-Plus SR4211 is built as an OE-style suspension strut and coil spring assembly for front-end service on the Buick Lucerne and Cadillac DTS. KYB develops this assembly around vehicle-specific corner weights and suspension requirements to help return the vehicle to original ride height and restore control characteristics. The Strut-Plus line combines a KYB Excel-G strut, precision damping calibration, and a high carbon steel spring in one pre-assembled unit for a direct replacement approach.

This part cross-references Monroe Shocks & Struts (e.g., 172321, 182321) for the same application. Fits 2006-2011 Buick Lucerne, front. Fits 2006-2011 Cadillac DTS, front.

Common Problems This Part Can Address

• Excessive front-end bounce or poor damping control
• Sagging ride height from a worn coil spring
• Loose or unstable steering feel at the front suspension
• Noisy or tired strut performance during braking and cornering
• Reduced suspension response on vehicles with electronic stability systems

Installation Notes and Tips

Verify suspension configuration before ordering. This assembly is listed for 2006-2011 Buick Lucerne without Magnetic Ride Control and for 2006-2011 Cadillac DTS with FE1 soft ride suspension, excluding electronic suspension, limo, hearse, and armored body applications. Confirm the front position and compare the original strut assembly, spring seat, and mounting points before installation. Professional installation and a post-installation alignment are recommended after front strut replacement.

Quality Assurance

KYB is an original equipment supplier, and the Strut-Plus line is engineered to restore handling and control with OE-focused fitment and damping characteristics. The SR4211 is assembled in the USA.