KYB 343426 Shock Absorber - Rear

KYB Excel-G Rear Shock for Scion xA and xB

KYB Excel-G shock absorber part number 343426 is an OE-style rear suspension replacement for select Scion models. It is built to restore original ride control, steering response, and body stability without changing the vehicle’s designed handling balance.

The Excel-G line is KYB’s Original Equipment for the Aftermarket offering, produced on the same KYB OE assembly lines and calibrated to match factory performance targets. For 2004-2006 Scion xA and 2004-2006 Scion xB rear applications, this shock is a direct-fit service part for restoring suspension control.

Key Features

• OE-style replacement shock absorber for Asian vehicles
• Fits 2004-2006 Scion xA, rear
• Fits 2004-2006 Scion xB, rear
• Nitrogen gas-charged twin-tube design
• Vehicle-specific, hand-assembled damping valves for controlled tire contact and body motion
• Triple-lip fluid seal helps reduce oil and gas leakage
• Strong strut-body construction helps minimize flex and maintain alignment under load
• Part number 343426

Product Details

KYB Excel-G 343426 is engineered to restore the suspension behavior the vehicle was originally designed to deliver. It uses OE-quality components and factory-calibrated damping to support ride control, lane-change response, braking stability, and handling consistency. This makes it a practical choice for drivers servicing a rear shock on a Scion xA or Scion xB and wanting to return the vehicle to original operating characteristics.

The Excel-G product line focuses on preserving factory suspension tuning rather than altering it. That approach is especially relevant for vehicles with electronic safety systems that depend on proper suspension, brake, and tire performance. This part cross-references Monroe Shocks & Struts (e.g., 5601) for the same application.

Common Issues This Part Addresses

• Excessive bouncing or poor rebound control
• Reduced stability during braking or lane changes
• Loose or unsettled rear suspension feel
• Uneven tire contact caused by worn damping
• Loss of factory ride control on Scion xA and Scion xB rear suspension

Installation Notes and Tips

Verify rear fitment by year, make, and model before installation. For 2004-2006 Scion xA rear and 2004-2006 Scion xB rear applications, additional components may be required depending on the vehicle’s current suspension condition and mounting hardware reuse. Inspect related suspension parts, including mounts and bushings, before replacing the shock absorber.

Compressed length is 17.28 in, extended length is 25.74 in, and stroke length is 8.46 in. Lower mount type is E2(16X40) and upper mount type is S1. Dust cover, internal rebound spring, and B-stop are not included; R-stop is listed as yes.

Quality Assurance

KYB is a global OE supplier of shocks and struts, and the Excel-G line is manufactured on KYB OE assembly lines using OE-quality components. The part is calibrated to restore original suspension performance for the specified Scion applications.