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Parts for your 2021 Mitsubishi Asx-Control arms
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2021 Mitsubishi ASX control-arms: what they do, when to replace, and how to look after them
Control-arms are absolutely fitted to the 2021 Mitsubishi ASX. Technical sources including the Mitsubishi Motors Service Manual for GA2W/GA3W (ASX/RVR/Outlander Sport) and the Mitsubishi ASA Electronic Parts Catalogue for MY2021 confirm a MacPherson-strut front end with a lower control arm on each side, plus a multi-link rear arrangement that uses lateral and trailing arms to locate the hub. So, control-arms are very much relevant on this model.
On the ASX, the front lower control-arms pivot on rubber bushes at the subframe and connect to the steering knuckle via a ball joint. Their job is to keep the wheel located in the right spot, manage camber and caster under load, and let the suspension move up and down smoothly. The bushes help isolate noise and vibration, the ball joint allows steering articulation, and together they keep the car tracking straight and the tyres wearing evenly. At the rear, the multi-link arms set toe and camber, contributing to a settled, predictable feel over bumpy Aussie and Kiwi roads.
They’re wear items, especially with high kilometres, heavy loads, or frequent gravel and pothole impacts. For the 2021 ASX, it’s smart to have the control-arm bushes and ball joints inspected at least annually or every 20,000 kilometres. Typical signs it’s time for attention include:
- Clunks over speed bumps or when braking/accelerating
- Vague steering, tramlining, or the car pulling to one side
- Uneven or rapid tyre wear on the inner or outer edges
- Shimmy or vibration through the wheel, particularly under brakes
- Cracked/torn bushes, split ball-joint boots, or leaking grease
When replacing, many ASX front arms are supplied complete with pre-fitted bushes and ball joint, which can save time and ensure correct press-fit. Replace in axle pairs for balanced handling. Tighten pivot bolts at normal ride height so the bushes aren’t preloaded, and always get a four-wheel alignment afterwards—arm changes can nudge camber and toe. If the car sees rough use, consider upgraded bushes (polyurethane or heavy-duty rubber), but keep in mind that firmer bushes can add a bit of cabin feel. Reuse or replace fasteners as specified in the Mitsubishi service manual, and recheck torque after the first few drives if recommended.
Looked after properly, fresh control-arms restore quietness, straight-line stability, and even tyre wear, making the 2021 ASX feel tight and confident again.
Popular questions about 2021 Mitsubishi ASX control-arms
Do all 2021 ASX models have control-arms front and rear?
Yes. The 2021 ASX uses front lower control-arms with MacPherson struts, and a multi-link rear that employs several control arms to manage wheel alignment. This layout is shown in the Mitsubishi Motors Service Manual (GA2W/GA3W) and the Mitsubishi ASA Electronic Parts Catalogue for MY2021.
How long do ASX control-arm bushes and ball joints typically last?
It varies with driving and road conditions, but many owners see 80,000–150,000 kilometres before noticeable wear. Regular checks—yearly or every 20,000 kilometres—help catch small issues early, especially if the ASX tows, carries loads, or tackles corrugated and broken surfaces.
Is a wheel alignment needed after control-arm replacement on an ASX?
Yes. Any change to arms, bushes, or ball joints can alter toe and camber. A proper four-wheel alignment will protect tyre life and restore straight-line feel, and it’s wise to confirm the steering wheel sits dead-centre after the job.
