Parts for your 2014 Toyota Bb-Strut mounts

2014 Toyota bB strut-mounts — what they do and when to replace them

Based on Toyota technical literature and parts catalogues (Toyota TIS service manuals and the Japanese EPC/Global EPC), the 2014 Toyota bB (QNC21 series) uses a front MacPherson strut suspension. Those documents list a “Front Suspension Support Sub-Assembly” (commonly called a strut mount or top mount), confirming strut-mounts are fitted on the front of this vehicle. The rear is a torsion beam without strut-mounts, so only the fronts apply.

On the bB, the strut-mounts sit at the top of each front strut and do two key jobs: they isolate vibration and noise from the cabin, and they act as a pivot point so the strut can turn smoothly with the steering. Inside is a rubber insulator for cushioning and, in most designs for this model, an integrated bearing to let the strut rotate. When they’re in good nick, the car steers quietly and rides without harsh thumps over bumps.

Like bushings and tyres, strut-mounts are wear items. Over time, the rubber can crack or compress, and the bearing can dry out or seize. Common signs on a 2014 bB include:

• Clunks or knocks over small bumps
• Creaking or groaning while turning the wheel, especially at low speeds
• Vague steering, “memory steer”, or the wheel not returning to centre cleanly
• Uneven front tyre wear or a slightly altered ride height on one corner

If any of these show up, it’s smart to inspect the mounts along with the struts, springs, dust boots, and bump stops. In many cases, replacing mounts at the same time as front struts is the best value, as labour overlaps.

For servicing, go with quality OE or OE-equivalent strut-mounts. Replace in axle pairs to keep steering feel consistent side to side. Follow the workshop manual procedure, support the knuckle properly, and torque fasteners with the suspension at normal ride height to avoid preloading the rubber. New self-locking nuts are typically specified by Toyota and should be used. Any time the front struts or mounts are disturbed, book a wheel alignment — it helps protect your tyres and restores the bB’s straight-line stability. Given our Aussie and Kiwi road conditions, a quick suspension check at each service and a thorough look around 80,000–120,000 km keeps the bB riding sweet and steering smoothly.

How long do strut-mounts last on a 2014 Toyota bB?

It varies with road quality and driving style, but many owners see 80,000–150,000 km before noticeable wear. City kerbs, rough chipseal, and speed humps can shorten that. A yearly inspection with the front lifted is a solid preventative step.

What symptoms mean the bB’s strut-mounts need replacing?

Listen and feel for clunks over small bumps, creaks when turning at parking speeds, notchy steering, or the wheel failing to return to centre. Uneven front tyre wear or a slight change in ride height at one corner can also point to a tired mount.

Do you need a wheel alignment after replacing strut-mounts?

Yes. Any work that disturbs the front strut assembly can nudge camber or toe. A proper alignment after fitting new mounts helps the bB track straight and protects the tyres.

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