Parts for your 2018 Mitsubishi Asx-Control arms

2018 Mitsubishi ASX control arms: what they do and when to replace them

Control arms are absolutely used on the 2018 Mitsubishi ASX. Technical sources including the Mitsubishi Motors ASX (RVR/Outlander Sport) Workshop Manual (Front Suspension – MacPherson strut with lower arm, Rear Suspension – multi-link), the Mitsubishi ASA/CAPS parts catalogue (front lower control arm and rear lateral arms listings), and aftermarket catalogues (e.g., Monroe/Monotube and SuperPro bush part listings for ASX front lower control arm bushes) all identify control arms as fitted components on this model year. So they’re not only relevant—they’re key to how the ASX steers, rides and wears its tyres.

On the ASX, the front end runs a MacPherson strut set-up with a single lower control arm per side. That arm anchors the wheel hub to the subframe, sets geometry (caster and camber), and lets the wheel move up and down while keeping it located front-to-back. The arm’s ball joint connects to the steering knuckle, while rubber or hydraulic bushes at the chassis end absorb vibration and road harshness. Down the back, the multi-link layout uses several arms—often called lateral or control arms—to manage wheel alignment through suspension travel for better grip and comfort.

Because control arms carry big loads and cop a hard life on Aussie and Kiwi roads, their bushes and ball joints are wear items. There’s no fixed replacement interval, but many owners see bush or ball joint wear anywhere from 80,000 to 150,000 km, sooner if the car sees corrugations, heavy loads, or a lot of stop-start urban use.

What to watch for:

• Clunks or knocks over bumps, especially at low speed
• Steering vagueness, tramlining or the car pulling under braking
• Uneven or rapid inner/outer tyre wear
• Vibration through the wheel, or squeaks as the suspension moves

Service tips for the 2018 ASX control arms:

• Inspect bushes for cracks, tearing or oil saturation, check ball joint boots for splits and play
• Replace arms or bushes in pairs per axle for even handling
• Torque all pivot bolts at normal ride height to avoid preloading the bushes
• Always book a 4-wheel alignment after control arm, bush or ball joint work
• Consider upgraded polyurethane bushes for longevity, or OE-style rubber for comfort

If there’s any doubt, a quick check on a hoist with a pry bar and dial indicator will confirm play. Sorting worn control arms restores crisp steering, improves braking stability and saves tyres—well worth doing as part of scheduled inspections every 20,000 km or annually.

Popular questions about 2018 Mitsubishi ASX control arms

Does the 2018 ASX have control arms front and rear?
Yes. The front uses a MacPherson strut with a lower control arm per side, and the rear multi-link system uses multiple arms (often called lateral or control arms) to control wheel motion and alignment. This is documented in the Mitsubishi workshop manual and supported by OEM parts catalogue listings.

How long do ASX control arm bushes and ball joints last?
There’s no fixed schedule. Many see 80,000–150,000 km, but rough roads, heavy loads, and big temperature swings can shorten that. Regular inspections are the go—look for cracked bushes, torn boots and any free play, and act early to avoid tyre wear.

Do I need an alignment after replacing a control arm?
Definitely. Any work on arms, bushes or ball joints can nudge caster, camber or toe. A proper 4-wheel alignment after the job protects your tyres and gets the ASX tracking straight.