KYB Gas-a-Just Monotube Front Shock Absorber KG54309 for Ford Explorer and Mercury Mountaineer

The KYB Gas-a-just monotube shock absorber has additional performance advantages over the traditional twin-tube design: It can instantly, automatically adjust to your performance needs and never experiences fade due to aeration. 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.

• Electronic safety systems depend on the suspension, brakes and tires operating as the vehicle manufacturer intended. The KYB Gas-a-just helps keep Electronic Safety Systems performing as designed.

The KYB Gas-a-Just KG54309 is a high-pressure monotube front shock absorber designed to improve ride control, handling response, and suspension performance on select Ford Explorer and Mercury Mountaineer applications. Its monotube design separates the hydraulic oil and high-pressure nitrogen gas into two working chambers, helping the shock respond quickly to changing road and driving conditions.

The air-free hydraulic piston and valve area provides consistent responsiveness and control, while the floating piston and nitrogen gas chamber help reduce aeration-related fade. This allows the KYB Gas-a-Just to deliver a comfortable ride during normal driving while providing additional damping performance when cornering, braking, accelerating, or carrying heavier loads. The shock automatically adjusts to changing performance demands without requiring electronic controls or manual adjustments.

KYB engineered the Gas-a-Just KG54309 to support the suspension performance required by the vehicle manufacturer. Properly functioning shocks are also important to the operation of electronic safety systems, which depend on the suspension, brakes, and tires working as intended. This automotive replacement shock absorber is intended for front suspension applications and is sold individually. Verify vehicle year, model, suspension position, and application details before installation.

Key Product Specifications and Technical Data

• Brand: KYB
• Part Number: KG54309
• Product Type: Monotube gas-charged shock absorber
• Position: Front
• Construction: Separate hydraulic and high-pressure nitrogen gas chambers
• Performance Benefit: Helps resist fade caused by aeration
• Application Type: Automotive replacement suspension component
• Quantity: One shock absorber

What's Included

• One KYB Gas-a-Just KG54309 front shock absorber

Fitment

Fits select 1997-2001 Ford Explorer models, select 2001-2003 Ford Explorer Sport models, and select 1997-2001 Mercury Mountaineer models. Confirm exact fitment using the vehicle year, make, model, suspension position, and manufacturer application data before purchase.

Features:

• Monotube design: Provides quick damping response and consistent suspension control.
• High-pressure nitrogen chamber: Helps reduce aeration and maintain performance during demanding driving conditions.
• Automatic performance adjustment: Responds to changing road surfaces, cornering, braking, acceleration, and load conditions.
• Electronic safety system support: Helps maintain suspension performance required for the vehicle's brakes, tires, and electronic safety systems.

Fitments:
1995 Ford Explorer Eddie Bauer
1995 Ford Explorer Expedition
1995 Ford Explorer Limited
1995 Ford Explorer Sport
1995 Ford Explorer XL
1995 Ford Explorer XLT
1996 Ford Explorer Eddie Bauer
1996 Ford Explorer Limited
1996 Ford Explorer Sport
1996 Ford Explorer XL
1996 Ford Explorer XLT
1997 Ford Explorer Eddie Bauer
1997 Ford Explorer Limited
1997 Ford Explorer Sport
1997 Ford Explorer XL
1997 Ford Explorer XLT
1997 Mercury Mountaineer Base
1998 Ford Explorer Eddie Bauer
1998 Ford Explorer Limited
1998 Ford Explorer Sport
1998 Ford Explorer XL
1998 Ford Explorer XLT
1998 Ford Ranger EV
1998 Ford Ranger Splash
1998 Ford Ranger XL
1998 Ford Ranger XLT
1998 Mazda B3000 SE
1998 Mazda B3000 SX
1998 Mazda B4000 SE
1998 Mercury Mountaineer Base
1999 Ford Explorer Eddie Bauer
1999 Ford Explorer Limited
1999 Ford Explorer Sport
1999 Ford Explorer XL
1999 Ford Explorer XLS
1999 Ford Explorer XLT
1999 Ford Ranger EV
1999 Ford Ranger XL
1999 Ford Ranger XLT
1999 Mazda B3000 SE
1999 Mazda B3000 Troy Lee
1999 Mazda B4000 SE
1999 Mercury Mountaineer Base
2000 Ford Explorer Eddie Bauer
2000 Ford Explorer Limited
2000 Ford Explorer Postal
2000 Ford Explorer Sport
2000 Ford Explorer XL Fleet
2000 Ford Explorer XLS
2000 Ford Explorer XLT
2000 Ford Ranger EV
2000 Ford Ranger XL
2000 Ford Ranger XLT
2000 Mazda B3000 SE
2000 Mazda B3000 SX
2000 Mazda B3000 Troy Lee
2000 Mazda B4000 SE
2000 Mazda B4000 Troy Lee
2000 Mercury Mountaineer Base
2001 Ford Explorer Eddie Bauer
2001 Ford Explorer Limited
2001 Ford Explorer Postal
2001 Ford Explorer XL Fleet
2001 Ford Explorer XLS
2001 Ford Explorer XLT
2001 Ford Explorer Sport Base
2001 Ford Explorer Sport Trac Base
2001 Ford Ranger Edge
2001 Ford Ranger EV
2001 Ford Ranger XL
2001 Ford Ranger XLT
2001 Mazda B3000 DS
2001 Mazda B3000 SE
2001 Mazda B4000 DS
2001 Mazda B4000 SE
2001 Mercury Mountaineer Base
2002 Ford Explorer Sport Base
2002 Ford Explorer Sport Trac XL
2002 Ford Ranger Edge
2002 Ford Ranger EV
2002 Ford Ranger Postal
2002 Ford Ranger XL
2002 Ford Ranger XLT
2002 Mazda B3000 Base
2002 Mazda B3000 DS
2002 Mazda B4000 Base
2002 Mazda B4000 DS
2003 Ford Explorer Sport XLS
2003 Ford Explorer Sport XLT
2003 Ford Explorer Sport Trac XLS
2003 Ford Explorer Sport Trac XLT
2003 Ford Ranger Edge
2003 Ford Ranger XL
2003 Ford Ranger XLT
2003 Mazda B3000 DS
2003 Mazda B3000 SE
2003 Mazda B4000 Base
2003 Mazda B4000 DS
2003 Mazda B4000 SE
2004 Ford Explorer Sport Trac XLS
2004 Ford Explorer Sport Trac XLT
2004 Ford Ranger Edge
2004 Ford Ranger Tremor
2004 Ford Ranger XL
2004 Ford Ranger XLT
2004 Mazda B3000 DS
2004 Mazda B3000 SE
2004 Mazda B4000 Base
2004 Mazda B4000 DS
2004 Mazda B4000 SE
2005 Ford Explorer Sport Trac Adrenalin
2005 Ford Explorer Sport Trac XLS
2005 Ford Explorer Sport Trac XLT
2005 Ford Ranger Edge
2005 Ford Ranger FX4
2005 Ford Ranger STX
2005 Ford Ranger XL
2005 Ford Ranger XLT
2005 Mazda B3000 Base
2005 Mazda B3000 DS
2005 Mazda B4000 Base
2005 Mazda B4000 SE
2006 Ford Ranger FX4
2006 Ford Ranger Sport
2006 Ford Ranger STX
2006 Ford Ranger XL
2006 Ford Ranger XLT
2006 Mazda B3000 Base
2006 Mazda B3000 DS
2006 Mazda B4000 Base
2006 Mazda B4000 SE
2007 Ford Ranger FX4
2007 Ford Ranger Sport
2007 Ford Ranger STX
2007 Ford Ranger XL
2007 Ford Ranger XLT
2007 Mazda B3000 Base
2007 Mazda B3000 DS
2007 Mazda B4000 Base
2007 Mazda B4000 SE
2008 Ford Ranger FX4
2008 Ford Ranger Sport
2008 Ford Ranger XL
2008 Ford Ranger XLT
2008 Mazda B4000 Base
2008 Mazda B4000 SE
2009 Ford Ranger FX4
2009 Ford Ranger Sport
2009 Ford Ranger XL
2009 Ford Ranger XLT
2009 Mazda B4000 Base
2010 Ford Ranger Sport
2010 Ford Ranger XL
2010 Ford Ranger XLT
2011 Ford Ranger Sport
2011 Ford Ranger XL
2011 Ford Ranger XLT

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