Parts for your 2015 Mazda Cx-9-Strut mounts

2015 Mazda CX-9 Strut Mounts: What They Do and When to Replace

Based on technical references, the 2015 Mazda CX‑9 uses MacPherson struts at the front, which means it does have front strut mounts with integrated bearings. This layout is specified in Mazda’s Workshop Manual for the CX‑9’s front suspension, and is also reflected in major technical catalogues and parts databases (e.g., KYB and Monroe front strut mount listings for the 2015 CX‑9, and genuine Mazda parts catalogues). The rear of the CX‑9 is a multi‑link arrangement using separate shock absorbers, so rear strut mounts aren’t applicable.

On a 2015 CX‑9, the front strut mounts do several important jobs. They isolate bumps and vibration so the cabin stays quiet, carry the vehicle’s weight at the top of the strut, and allow the strut to rotate smoothly as the wheels steer thanks to the built‑in bearing. When they’re in good nick, steering feels light and precise, and road noise is well controlled. When they’re tired, the car can feel clunky and vague.

Tell‑tale signs it’s time to service or replace the front strut mounts include:

• Clunks or creaks over speed humps, potholes, or driveways
• Groaning or notchy steering, especially at parking speeds
• Vague on‑centre feel, tramlining, or uneven tyre wear
• Visible cracks in the rubber insulator or play at the top of the strut

Best practice on a CX‑9 is to replace the strut mounts whenever the front struts are replaced, or at higher mileages as preventative maintenance. Do them in pairs to keep handling balanced. Choose quality mounts with the correct bearing, cheap units can add steering friction and noise. During the job, inspect the coil springs, dust boots, bump stops, and upper spring seats, and renew any tired bits. Always use new self‑locking hardware where specified and torque to Mazda’s spec. After any front strut or mount work, a wheel alignment is a must to protect tyres and keep it tracking straight.

Regular servicing notes from local workshops: listen for front‑end noises on test drives, check for upper mount movement with the vehicle on the ground, and note any steering return‑to‑centre issues—these often point straight to the mounts. Look after these and the big Mazda stays quiet, comfy, and sure‑footed over Aussie and Kiwi roads.

Do both front strut mounts need replacing together on a 2015 CX‑9?

Yes, it’s smart to replace them as a pair. The mounts age at a similar rate, and doing both maintains even steering feel and braking stability. Pairing them with new struts and an alignment keeps everything working harmoniously.

How long do CX‑9 strut mounts typically last?

Many see 100,000–160,000 kilometres, but life varies with road conditions and load. Frequent corrugations, heavy towing, or big wheels can shorten that. If you’re renewing front struts in that range, budget for mounts and bearings at the same time.

Can worn strut mounts cause knocking or steering noise?

They can. A failed bearing or perished rubber can knock over bumps and groan when turning at low speed. If noises change while steering or when driving over rough surfaces, the front mounts are prime suspects.