Parts for your 2018 Mazda 3-Struts

2018 Mazda 3 struts — what they do and when to replace them

Based on technical references including the Mazda Workshop Manual for the BM/BN series (2014–2018), Mazda Australia’s 2018 model specifications, and fitment catalogues from major damper manufacturers (e.g., KYB and Monroe), the 2018 Mazda 3 uses MacPherson struts on the front axle and a multi‑link rear with separate shock absorbers. So yes, struts are fitted on the front of this vehicle and are absolutely relevant.

On the front of a 2018 Mazda 3, the strut is a structural damper assembly that does double duty: it controls spring movement to keep the tyres planted and also locates the wheel, helping maintain steering geometry under braking and cornering. Each front strut integrates the damper, coil spring, spring seat, and upper mount/bearing so the steering can turn smoothly while the suspension compresses. That’s why healthy struts make such a difference to steering feel, braking stability, and ride comfort.

There’s no fixed replacement interval in the factory schedule, but most techs see front struts start to fade somewhere around 80,000–120,000 km depending on roads and load. As part of regular servicing, it’s smart to inspect for oil seepage, damaged dust boots, perished bump stops, or play/noise in the top mounts. A test drive that shows excess nose‑dive, floaty rebound, or steering shimmy over bumps is another nudge to act.

When replacing, always do struts in pairs across the front to keep the car balanced. It’s good practice to renew the strut mounts/bearings and dust boots at the same time, and to torque all fasteners with the suspension at ride height. Because MacPherson struts influence camber and toe, a wheel alignment straight after the job is highly recommended.

Choosing quality components pays off. OE‑equivalent twin‑tube or monotube options from reputable brands will restore proper damping without making the ride harsh. If the car runs bigger wheels or sees rough country roads, consider slightly uprated units to cope with the extra punishment while keeping everyday comfort.

• Common signs of tired front struts on a Mazda 3:
  • Clunks over sharp bumps or during low‑speed turns
  • Uneven or cupped front tyre wear
  • Oily residue on the strut body
  • Longer braking distances due to front end dive

FAQs

Does the 2018 Mazda 3 have struts or shocks?
It runs MacPherson struts up front and conventional shock absorbers at the rear. The front struts are structural and affect wheel alignment, the rear shocks simply control spring movement in the multi‑link setup.

How long do the front struts typically last?
Many owners see solid performance to around 80,000–120,000 km, but lifespan varies with road conditions, load, and tyre choice. If there’s oil seepage, knocking, or the car feels floaty or darts over bumps, it’s time to test and likely replace.

Is a wheel alignment needed after front strut replacement?
Yes. Because the strut locates the hub, removing and refitting it can alter camber and toe. A professional alignment right after the job prevents premature tyre wear and restores sharp, predictable steering.