KYB Gas-a-Just Rear Monotube Shock Absorber 553389 for Ford C-Max and Mazda 3

The Gas-a-just monotube shock absorber is available as an OE monotube replacement to restore your vehicles original capabilities. The KYB Gas-a-just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness and control, and a second high-pressure nitrogen gas area with a floating piston that provides a comfortable ride during normal driving and adds instant performance on demand.

• Protect your new struts from dirt, debris and salt with a KYB Strut Boot, part number: SB125

Restore responsive handling and original ride control with the KYB Gas-a-Just monotube rear shock absorber, part number 553389. Designed as an OE-style replacement, this automotive shock absorber helps support stable vehicle control, consistent damping, and confident performance during everyday driving. Its monotube design separates the hydraulic working area from the high-pressure nitrogen chamber for quick response and dependable operation.

Brief Description: The KYB Gas-a-Just uses an air-free hydraulic piston and valve area for responsive control, while a floating piston separates the hydraulic fluid from the high-pressure nitrogen gas. This configuration helps reduce aeration, maintain damping performance, and provide a comfortable ride during normal driving with added control when road conditions or driving demands change.

• Key Product Specifications & Technical Data: Brand: KYB
• Key Product Specifications & Technical Data: Part Number: 553389
• Key Product Specifications & Technical Data: Product Type: Rear shock absorber
• Key Product Specifications & Technical Data: Design: Monotube
• Key Product Specifications & Technical Data: Gas Technology: High-pressure nitrogen with floating piston
• Key Product Specifications & Technical Data: Installation Position: Rear
• Key Product Specifications & Technical Data: Replacement Type: OE-style replacement
• Key Product Specifications & Technical Data: Vehicle Application: Automotive

What's Included: One KYB Gas-a-Just rear monotube shock absorber. For additional protection against dirt, debris, and road salt, KYB recommends pairing the shock absorber with a KYB Strut Boot, part number SB125, where applicable.

Fitment: Fits select 2010–2013 Mazda 3 applications and 2013–2014 Ford C-Max applications. Verify the vehicle year, model, trim, and suspension configuration before ordering.

Features:

• Monotube design: Provides responsive damping and consistent control through separate hydraulic and gas chambers.
• High-pressure nitrogen technology: Uses a floating piston to help reduce fluid aeration and maintain performance.
• OE-style replacement: Helps restore the vehicle's original ride control and handling characteristics.
• Protection accessory compatibility: Can be paired with KYB Strut Boot SB125 to help protect against dirt, debris, and road salt.

Fitments:
2010 Mazda 3 i
2010 Mazda 3 S
2011 Mazda 3 i
2011 Mazda 3 S
2012 Mazda 3 i
2012 Mazda 3 S
2013 Ford C-Max Energi SEL
2013 Ford C-Max Hybrid SE
2013 Ford C-Max Hybrid SEL
2013 Mazda 3 i
2013 Mazda 3 S
2014 Ford C-Max Energi SEL
2014 Ford C-Max Hybrid SE
2014 Ford C-Max Hybrid SEL
2015 Ford C-Max Energi SEL
2015 Ford C-Max Hybrid SE
2015 Ford C-Max Hybrid SEL
2016 Ford C-Max Energi SEL
2016 Ford C-Max Hybrid SE
2016 Ford C-Max Hybrid SEL
2017 Ford C-Max Energi SE
2017 Ford C-Max Energi Titanium
2017 Ford C-Max Hybrid SE
2017 Ford C-Max Hybrid Titanium
2018 Ford C-Max Hybrid SE
2018 Ford C-Max Hybrid Titanium

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1