Restore controlled, planted handling with the KYB shock absorber 3430037, a nitrogen gas-charged Excel-G unit that drops in as a direct-fit rear replacement for the 2016-2021 Mazda CX-3 (see the "Vehicles it fits" section for engine-level fitment). Part of KYB's OEA (Original Equipment for the Aftermarket) line, the Excel-G is calibrated to help restore the vehicle's original designed damping — not change it.
Gas-charged twin-tube design: A nitrogen gas-charged, twin-tube build that includes the same quality components KYB uses on its global OEM products.
Triple-lip fluid seal: Uses a triple lip fluid seal to reduce the chance of oil and gas leaking out.
Vehicle-specific damping valves: Hand-assembled in-house damping valves are designed to manage tire contact, steering response and body movement, helping restore the designed control and handling of your 2016-2021 Mazda CX-3.
Supports electronic safety systems: Because stability and safety systems rely on the suspension working as intended, the Excel-G helps keep those electronic safety systems performing as designed.
Signs a shock may need replacing include excessive bounce, nose-dive under braking, poor body control over bumps, or fluid leaking from the shock body. Shocks are sold individually; replacing the rear shocks together as a matched pair is recommended for balanced ride control.
Interchange: DB4J28700E · DH1G28910B · DH1G28910C
This part cross-references / interchanges with the following part numbers:
DB4J28700E, DH1G28910B, DH1G28910C
Frequently Asked Questions
What vehicle does the KYB gas shock absorber 3430037 fit?
It is a direct-fit rear shock for the 2016-2021 Mazda CX-3. Check the "Vehicles it fits" section to confirm the exact application for your vehicle.
Is this a front or rear suspension shock absorber?
This KYB Excel-G unit is cataloged for the rear position on the listed 2016-2021 Mazda CX-3 applications.
What is the KYB Excel-G design?
It is a nitrogen gas-charged, twin-tube shock built on KYB OE assembly lines with the same OE-quality components used on its global OEM products.
Should I replace both rear shocks at once?
It's recommended. Shocks are sold individually, but replacing the rear pair together helps maintain even, balanced ride control and handling.
What are signs my rear shocks need replacing?
Watch for excessive bouncing, nose-dive under braking, poor body control over bumps, or oil leaking from the shock body. Diagnose the cause before replacing.
