Parts for your 2008 Toyota Bb-Struts

2008 Toyota bB struts: what they do and when to replace them

Technical references confirm the 2008 Toyota bB is built with MacPherson struts on the front axle and conventional shock absorbers on the rear. Toyota’s bB (QNC20/21/25) repair manual front suspension section identifies a MacPherson strut layout, and Toyota’s Electronic Parts Catalogue lists “Shock Absorber Assy, Front (strut)” for these models. Platform-mate service information for the Daihatsu Materia/Subaru Dex also cites a front MacPherson strut and a rear torsion beam with separate dampers. So, yes—front struts are fitted, the rear is not a strut.

On the 2008 bB, the front strut is a compact unit that combines the shock absorber and coil spring, doubling as a key suspension member and a steering pivot. That design keeps things light and tidy under the bonnet, delivers predictable handling, and helps the bB ride comfortably over rough Aussie and Kiwi roads.

Owners should think of struts as wear items. By 80,000–150,000 kilometres, many will have softened noticeably, especially if the car has seen plenty of urban speed humps or coarse-chip highways. Telltales include front-end clunks over bumps, increased braking dive, floaty cornering, steering wander, and uneven tyre wear. Any oil seepage down the strut body is a fail sign.

When the time comes, it’s smart to replace struts in axle pairs to keep handling balanced. A good service will also renew the strut top mounts/bearings, bump stops, and dust boots, then finish with a proper wheel alignment. Because the strut locates the hub, alignment is essential after removal. If the bB has developed a notchiness in steering return-to-centre, fresh top mounts usually tidy that up nicely.

For daily driving, OE-quality replacements from reputable brands are the go—nothing too harsh, just a controlled, comfortable ride that looks after tyres. If the bB carries loads or spends time on backroads, slightly uprated inserts and new springs can lift control without spoiling comfort. Ask the workshop to torque all fasteners at normal ride height to avoid bush pre-load squeaks later.

Maintenance-wise, have the fronts inspected at each service: check for leaks, perished boots, and any play or noise from the tops. Keep tyres correctly inflated and rotated—healthy tyres and aligned geometry help the new struts do their best work and keep the car WOF/roadworthy-friendly.

• Replace in pairs and align the front end
• Renew mounts, boots, and stops with the struts
• Inspect every service, watch for leaks and uneven tyre wear

Does the 2008 Toyota bB have struts front and rear?

No. It runs MacPherson struts at the front and standard shocks on a torsion-beam rear. That’s normal for compact Toyotas of the era and helps packaging and ride quality without complicating the back end.

How often should bB front struts be replaced?

There’s no fixed interval, but many need attention between 80,000 and 150,000 km depending on roads and loads. Go by symptoms—leaks, clunks, excess dive—or get them assessed during servicing and after any accident or big pothole hit.

Will worn struts cause a WOF or roadworthy fail?

They can. Leaking dampers, loose top mounts, or excessive bounce can trigger a fail, and uneven tyre wear from poor damping or alignment won’t help either. Fresh struts, new mounts, and a proper alignment usually sort it.