KYB 7240000 Suspension Shock Absorber - Rear or Rear Right

KYB Gas-a-just Rear Shock for Lexus

KYB Gas-a-just 7240000 is a monotube adaptive shock absorber built as a direct OE replacement for select Lexus models with adaptive dampers. It is calibrated to restore original handling and control while responding automatically to changing road conditions.

For Lexus GS350, GS450h, GS300, GS200t, RC300, RC350, RC200t, and RC300 applications, this rear shock uses a high-pressure gas design and an air-free hydraulic working chamber to deliver consistent response without fade from aeration.

Key Features

• Direct OE replacement adaptive damper for Lexus rear suspension applications
• Calibrated to help restore original handling and control characteristics
• High gas pressure design adds immediate control when road conditions change
• Automatic response to suspension movement for balanced ride quality
• Air-free hydraulic piston and valve area helps eliminate performance fade
• Engineered to work with electronic safety systems such as ESC and ABS
• Installs without additional kits or accessories
• Part number 7240000 for accurate catalog matching

Product Details

The KYB Gas-a-just line is designed for drivers who want OE-style suspension behavior with quicker damping response. This monotube adaptive damper separates the hydraulic and gas chambers so the shock can maintain control during normal driving and react instantly when the suspension needs more support. The result is a rear shock that helps preserve ride comfort while improving control on Lexus vehicles equipped with adaptive variable suspension or sport suspension setups.

Part number 7240000 is a fitment-specific replacement for rear applications on 2013-2020 Lexus GS350, 2013-2018 Lexus GS450h, 2018-2019 Lexus GS300, 2016-2017 Lexus GS200t, 2015-2018 Lexus RC350, 2017-2018 Lexus RC300 rear right, 2017 Lexus RC200t, 2016 Lexus RC200t, and 2016 Lexus RC300 rear right. This part cross-references Lexus 4853080627 and 4853080630 for the same application.

What It Helps Address

• Excessive rear suspension bounce or poor damping control
• Loss of ride consistency from worn adaptive shock absorbers
• Reduced handling response during braking, cornering, or lane changes
• Suspension fade caused by aeration in the damper
• Restoration of OE ride feel on Lexus GS and RC models

Installation Notes

• Verify rear fitment by year, model, and position before installation.
• Some applications note replacing the suspension strut and coil spring assembly according to the manufacturer’s instructions.
• Confirm the lower mount type E2(14.2X70) and upper mount type S1(12MM) match the vehicle.
• Check compressed length 18.69, extended length 24.58, and stroke length 5.89 during service planning.
• Inspect related suspension components for wear before completing the repair.

Quality Assurance

KYB designs Gas-a-just shocks as OE-style replacement dampers for vehicles equipped with adaptive suspension systems. The monotube construction, internal rebound spring, and high-pressure gas chamber are used to maintain consistent damping response and support electronic safety systems such as ESC and ABS.