KYB 554402 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for Ford Focus

The KYB Gas-a-Just 554402 is a rear suspension shock absorber built for 2012-2018 Ford Focus applications. It uses a monotube design with separate gas and oil chambers to deliver quick response, consistent damping, and stable ride control during everyday driving.

Key Features

• Monotube shock design with air-free hydraulic and high-pressure nitrogen gas chambers
• Up to 25% more damping performance than original equipment shocks
• Valving and components tuned for Ford Focus rear suspension applications
• High-pressure design separates gas and oil for fade-resistant 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
• Supports proper suspension performance for vehicles with heavier tires and wheels
• Part number 554402 for rear shock replacement on Ford Focus models

Product Details

KYB Gas-a-Just shocks are designed around a monotube layout that keeps the gas charge isolated from the hydraulic fluid. That separation helps maintain consistent damping under load and during repeated suspension movement. For Ford Focus rear suspension service, 554402 provides a direct replacement option that restores control, reduces fade, and helps the vehicle respond more predictably over bumps and road transitions. This part cross-references Ford OE numbers BV6Z18125A and BV6Z18125B for the same application.

What It Helps Address

• Excessive rear bounce after bumps
• Reduced damping control from worn shock absorbers
• Fluid leakage related to seal wear
• Fade during repeated suspension compression and rebound
• Loose or delayed rear suspension response

Installation Notes

Fits 2012-2018 Ford Focus, rear. Verify the lower mount type E2(12X36) and upper mount type S1(8MM) before installation. Compressed length is 19.09, extended length is 27.95, and stroke length is 8.86. Confirm the replacement shock matches the vehicle’s rear suspension configuration and follow factory service procedures for torque and alignment checks.

Quality Assurance

KYB designs the Gas-a-Just line as a performance-oriented monotube shock absorber for vehicles that need consistent damping and quick response. The 554402 is engineered for Ford Focus rear applications and built to support stable suspension operation with the same general control characteristics expected from the KYB Gas-a-Just product line.