Renew confident ride height and steering feel with the KYB Strut-Plus assembly (SR4511) — a complete corner unit that pairs the strut, mount, and coil spring in one pre-assembled part. This KYB front strut assembly drops in as a front left complete strut and coil spring assembly for the 2014-2018 Mazda 3, engineered for exact fitment and professional results straight out of the box.
A strut assembly supports vehicle weight, sets ride height, serves as the steering pivot, and helps control stability, so a worn unit can bring on a bouncy, wandering ride. The KYB Strut-Plus is engineered to help restore the handling and control of your Mazda 3.
- OE-restoring build: starts with an Original Equipment Restoring KYB Excel-G strut featuring a stronger steel outer shell and KYB's application-specific, precision-designed damping valves.
- Application-engineered spring: high carbon steel coil springs developed around the vehicle's attributes and corner weights help keep ride height within OE specifications without sacrificing ride quality.
- Side-specific design: left and right part numbers with side-specific components, as the vehicle manufacturer intended.
- Safety-system aware: engineered to help vehicles equipped with electronic safety systems such as ESC and ABS.
Frequently Asked Questions
Does this KYB quick strut assembly fit my Mazda 3?
Yes — SR4511 is engineered as a direct-fit front left strut and coil spring assembly for the 2014-2018 Mazda 3. Check the Buyer's Guide tab to confirm your exact trim and engine.
What's included with the KYB Strut-Plus assembly?
It's a complete, pre-assembled corner unit: a KYB Excel-G strut, the upper mount, and an application-engineered high carbon steel coil spring — no separate spring compressor needed for assembly.
Is this a front left unit?
Yes, this is the front left assembly. KYB uses side-specific left and right part numbers, so SR4511 fits the left side; the right side uses a different KYB part number. Replacing both sides together is good practice for balanced handling.
How is this different from replacing just the strut?
KYB complete struts combine the strut, mount, and spring in one pre-assembled unit for a faster install, versus replacing only the strut cartridge and reusing your old spring and mount.
What are signs my strut assembly may need replacing?
Excessive bouncing, uneven or reduced ride height, nose dive when braking, clunks over bumps, or uneven tire wear can be signs. Diagnose the cause before replacing, as other suspension parts can produce similar symptoms.
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