Parts for your 2012 Mazda 6-Steering bushes

2012 Mazda 6 steering bushes: what they do and when to replace them

Steering bushes are fitted to the 2012 Mazda 6 (GH series). The Mazda Workshop Manual for the GH platform (Steering System – Steering Gear Removal/Installation) specifies rubber “steering gear insulators” that mount the rack to the front crossmember, and the Mazda Electronic Parts Catalogue for 2012 lists these insulators with their brackets under the steering gear assembly. Australian and New Zealand aftermarket catalogues also list replacement rack-mount bush kits for the GH Mazda 6, confirming they’re a serviceable item.

On this Mazda 6, the steering bushes sit between the rack-and-pinion housing and the subframe. Their job is to locate the rack precisely while isolating vibration and road shock from the cabin and steering wheel. When they’re healthy, the wheel feels tight, direct and predictable. As they age, heat, road grime and any power-steering fluid seepage harden or soften the rubber, which can let the rack shift slightly under load.

Common signs they’re past their best include a dull clunk over potholes or driveway lips, a vague or wandering feel on the motorway, a faint knock when twitching the wheel at a standstill, and accelerated inner or outer tyre wear. If the car has had a fluid leak at the rack, expect the rubber to perish faster, especially in Aussie and Kiwi summer heat.

There’s no routine “service” for the bushes beyond inspection, but it’s smart to have them checked at regular services or around every 40–60,000 km. A quick driveway check: with the bonnet up, have a mate rock the steering wheel left-right while watching the rack—any visible rack movement against the subframe points to tired bushes. Also look for cracked or oil-soaked rubber.

Replacement is straightforward workshop work: support the rack, remove the clamps, swap the bushes (observing orientation marks), then torque the hardware to spec. A wheel alignment is recommended afterwards, because small shifts in the rack or subframe can nudge toe out of spec. If the rack boots are torn or the rack is weeping, tackling those at the same time saves labour. Owners can choose OE-style rubber for factory feel and comfort, or quality polyurethane bushes for a crisper steering response at the expense of a touch more vibration. In local conditions, expect 1–2 hours of labour for the bush swap on a tidy, rust-free car.

• Tip: Fix any power-steering fluid leaks promptly—petroleum-based fluids accelerate rubber bush degradation.
• Tip: After replacement, recheck hardware torque after a few drives if recommended by the bush manufacturer.

FAQs

Do all 2012 Mazda 6 models have steering rack bushes?
Yes. The GH-series Mazda 6 uses rubber insulators (bushes) to mount the steering rack to the front crossmember. This is detailed in the Mazda GH Workshop Manual under steering gear installation and reflected in the Mazda parts catalogue for the 2012 model year.

What symptoms point to worn steering bushes on a 2012 Mazda 6?
Drivers often notice a dull clunk over bumps, a vague or slightly delayed steering response, or a light knock when nudging the wheel at idle. You might also see uneven tyre wear or feel the car tramlining more than usual. Any oil-soaked or visibly cracked bushes need attention.

Can the bushes be replaced without changing the whole steering rack, and is an alignment needed?
They can usually be replaced on their own, provided the rack itself isn’t worn or leaking. After refitting, a wheel alignment is recommended because even minor position changes of the rack or subframe can alter toe and steering-centre feel.