KYB 553393 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Smart Fortwo

The KYB Gas-a-Just 553393 is a rear suspension shock absorber built as an OE-style monotube replacement for the 2012-2017 Smart Fortwo. It restores original ride control with quick response, stable handling, and consistent damping for everyday driving.

Key Features

• Monotube OE replacement design for direct suspension service
• Separate gas and oil chambers for fade-resistant operation and fast response
• High-pressure nitrogen gas supports sharper steering response
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Built for vehicles that tow, work, or use larger, heavier tires and wheels
• Supports proper operation of electronic safety systems by maintaining suspension control

Product Details

KYB Gas-a-Just shocks use a monotube layout with an air-free hydraulic working area and a separate high-pressure nitrogen chamber. That design helps the shock react quickly during normal driving while adding firmer control when the vehicle is loaded or driven more aggressively. For Smart Fortwo rear suspension service, part number 553393 is a direct-fit replacement that helps restore the handling balance the vehicle was engineered to deliver. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive rear bounce after bumps
• Loose or delayed steering response
• Reduced control with heavier wheels and tires
• Shock fade during repeated suspension movement
• Oil seepage related to worn piston rod seals

Installation Notes and Tips

Fits 2012-2017 Smart Fortwo, rear. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify that the upper and lower mounts match the vehicle before installation. For Smart Fortwo rear shock replacement, confirm the existing suspension configuration and follow factory service procedures.

Quality Assurance

KYB is an OE supplier known for suspension components engineered to match factory control characteristics. The Gas-a-Just line is designed as a monotube replacement to help restore the Smart Fortwo’s original handling response and suspension performance.