KYB 554145 Shock Absorber - Rear

KYB Gas-a-just Rear Shock for Sedona

The KYB Gas-a-just 554145 is a rear suspension shock absorber for 2002-2005 Kia Sedona models. Built as a monotube design, it delivers quick response, stable damping, and fade-resistant operation for vehicles that carry heavier loads, tow, or run larger wheels and tires.

Gas-a-just Product Line

KYB Gas-a-just shocks use a high-pressure monotube layout with separate gas and oil chambers. That design helps the shock react quickly to road inputs while maintaining consistent control during normal driving and under added suspension demand.

Key Features

• Fits 2002-2005 Kia Sedona, rear
• Part number 554145
• Up to 25% more damping performance than original equipment shocks
• Monotube construction separates gas and oil for fade-free operation and fast response
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Higher gas pressure improves steering response and suspension control
• Dust cover included
• Designed specifically for the Kia Sedona application

Detailed Description

KYB 554145 is engineered for the rear suspension on the 2002-2005 Kia Sedona. The Gas-a-just design uses an air-free hydraulic working area for control and a high-pressure nitrogen chamber with a floating piston for consistent ride quality and immediate damping when conditions change. This makes it a practical choice for Sedona owners looking for firmer response without giving up everyday drivability. This part cross-references Monroe Shocks & Struts 37272 for the same application.

What It Helps Address

• Excessive rear bounce after bumps
• Reduced control when carrying passengers or cargo
• Shock fade from heat and repeated suspension movement
• Slow steering response caused by worn rear damping
• Fluid leakage related to seal wear

Installation Notes and Tips

Verify compressed length, extended length, and mount style before installation: compressed length 12.16, extended length 18.85, stroke length 6.69, lower mount E2(16X38), upper mount S1(12MM). Confirm the rear position on the vehicle and inspect related suspension components, bushings, and mounts before replacing the shock. Fits 2002-2005 Kia Sedona, rear.

Quality Assurance

KYB is a major OE suspension supplier, and the Gas-a-just line is built to meet the demands of vehicles that work harder than average. Part number 554145 is engineered for consistent damping performance and long-term control in the rear suspension of the Kia Sedona.