KYB 343412 Shock Absorber - Rear

KYB Excel-G Rear Shock Absorber

The KYB Excel-G 343412 is a rear suspension shock absorber engineered to restore original ride control, stability, and steering response. Built on KYB OE assembly lines, it is a direct-fit replacement for select Mazda 3 and Mazda 5 rear applications.

Excel-G is KYB’s OEA-style replacement line, using nitrogen gas-charged, twin-tube construction and OE-quality components to return the vehicle to its designed damping characteristics. For Mazda 3 and Mazda 5 rear suspension service, part number 343412 is a practical choice for restoring factory handling balance.

Key Features

• OE-style replacement shock absorber for Asian vehicles
• Restores designed control and handling on Mazda applications
• Nitrogen gas-charged, twin-tube design
• Triple-lip fluid seal helps reduce oil and gas leakage
• Vehicle-specific, hand-assembled damping valves manage tire contact, steering response, and body movement
• Strong strut body and bracket design helps minimize flex and maintain alignment
• Rear position fitment for select Mazda 3 and Mazda 5 models

Product Details

KYB Excel-G 343412 is built to match the original damping behavior of the vehicle rather than change it. It measures 18.89 inches compressed, 27.87 inches extended, and provides 8.98 inches of stroke. Mounting details include an E2 lower mount (12x51) and an S1 upper mount (8mm). The unit includes an R-stop and does not include a dust cover, internal rebound spring, or B-stop.

This part cross-references Monroe Shocks & Struts 5607 for the same application. It is a strong fitment match for rear suspension service on Mazda 3 and Mazda 5 models where factory-style ride control is the goal. The KYB Excel-G 343412 is also a common search match for rear shock absorber replacement on 2004-2009 Mazda 3 and 2006-2017 Mazda 5.

What It Helps Address

• Excessive bouncing after bumps
• Loose or unstable rear-end handling
• Reduced braking stability from worn damping
• Uneven tire contact caused by weak shock control
• Delayed response during lane changes and cornering

Installation Notes

• Fits 2016-2017 Mazda 5, rear
• Fits 2012-2015 Mazda 5, rear
• Fits 2006-2010 Mazda 5, rear
• Fits 2004-2009 Mazda 3, rear
• For Mazda 5 applications, replace the suspension strut and coil spring assembly according to the manufacturer’s instructions.
• Verify mount style and dimensions before installation to confirm the correct rear shock absorber replacement.

Quality Assurance

KYB supplies shocks and struts to new vehicle manufacturers, and Excel-G is produced on the same OE assembly lines using OE-quality components. That manufacturing approach supports consistent damping performance for Mazda 3 and Mazda 5 rear suspension service.