KYB 5510050 Suspension Shock Absorber - Rear

KYB Gas-a-Just Rear Shock for EcoSport

KYB Gas-a-just 5510050 is a monotube suspension shock absorber built as an OE-style replacement for the rear of the Ford EcoSport. It uses separate hydraulic and high-pressure gas chambers to deliver responsive damping, stable control, and a consistent ride in everyday driving.

Gas-a-Just Monotube Design

The Gas-a-just line is KYB’s monotube shock family for drivers who want original-equipment fit and firmer response than a conventional twin-tube design. For the Ford EcoSport rear suspension, this setup helps maintain control while still providing a comfortable ride during normal road use.

• Part number: 5510050
• Rear suspension shock absorber
• Monotube construction with air-free hydraulic working area
• High-pressure nitrogen gas chamber with floating piston
• Compressed length: 19.53 in.
• Extended length: 28.86 in.
• Stroke length: 9.33 in.
• Lower mount type: E2 (12x40)
• Upper mount type: S1 (8MM)
• Dust cover not included

Detailed Product Overview

KYB 5510050 is engineered for 2018-2022 Ford EcoSport rear applications and restores the vehicle’s original monotube shock absorber layout. The internal gas pressure helps reduce aeration in the hydraulic fluid, supporting consistent damping response over changing road conditions. This makes it a direct-fit choice for drivers searching for a rear shock absorber for 2018-2022 Ford EcoSport, KYB Gas-a-just 5510050, or an OE replacement rear shock for Ford EcoSport.

This part cross-references Monroe Shocks & Struts (e.g., GN1Z18125AP, GN1Z18125K) for the same application.

Common Problems This Part Addresses

• Excessive rear bounce after bumps
• Reduced body control during braking or cornering
• Uneven damping response from a worn shock absorber
• Rear suspension instability on rough pavement
• Loss of ride consistency in daily driving

Installation Notes and Fitment

Fits 2018-2022 Ford EcoSport, rear. Verify mount style, compressed length, extended length, and stroke length before installation to confirm proper suspension travel and alignment with the original mounting points. This KYB Gas-a-just 5510050 rear shock absorber is listed as a recommended OEM replacement for the Ford EcoSport rear position.

Quality Assurance

KYB is a recognized OE supplier, and the Gas-a-just line is built to restore factory-style suspension performance with a monotube design and gas-charged damping control.