Parts for your 2021 Honda Civic-Control arms

2021 Honda Civic Control Arms — What They Do and When to Replace Them

Based on technical references including the Honda Civic 2016–2021 Service Manual (Front Suspension – Lower Arm, Rear Suspension – Control Links) and Honda’s Electronic Parts Catalogue (EPC) listings for 2021 Civic FC/FK models, the 2021 Honda Civic is fitted with control arms: a front lower control arm in its MacPherson-strut setup and multiple control arms in the rear multi-link suspension. Dealer and OEM-style parts diagrams also show complete arms, bushings and ball joints specified for this model year.

On a 2021 Honda Civic, control arms keep each wheel correctly located while the suspension moves. Up front, the lower control arm links the steering knuckle to the subframe through a ball joint and rubber bushings, helping manage camber and caster while soaking up vibration. Out back, the multi-link layout uses several arms to keep rear toe and camber steady, which is why the car feels planted through corners and calm on rough Aussie and Kiwi roads.

When these arms or their bushings wear, the Civic can start making clunks over bumps, wander on the motorway, or scrub the inner or outer edges of the tyres. A shimmy on braking, vague steering, or a knocking noise at low speed are other common tells. It’s smart to have the control arms inspected at regular services, after a decent pothole strike, or around the 80,000–120,000 km mark depending on use.

Replacement options vary. For the front lower arm, many owners choose a complete arm assembly so the new bushings and ball joint arrive pre-installed. Rear arms are often replaced individually to correct play, seized adjusters, or torn bushes. Quality matters here—genuine Honda or reputable aftermarket arms usually hold alignment better and last longer. After any arm replacement, a four-wheel alignment is essential to get camber and toe back in spec and protect those tyres.

For anyone tackling the job, support the knuckle to avoid straining the brake hose or axle, mark any adjustable bolts, and only torque the arm’s pivot bolts at normal ride height so the bushes aren’t pre-loaded. Many techs recommend replacing paired arms left and right, and renewing any single-use fasteners. While there, have the technician check sway bar links and tie-rod ends—if they’re tired, doing them together saves a second alignment.

Look after the control arms and the Civic rewards with sharp turn-in, even tyre wear, and that confident, tidy ride it’s known for.

• Watch for: clunks, uneven tyre wear, steering wander, brake shimmy.
• Service tip: inspect at each service, align after any suspension work.
• Fitment: torque bush bolts at ride height, use quality parts.

Popular questions about 2021 Honda Civic control arms

How long do control arm bushings last on a 2021 Civic?
The lifespan depends on driving and road conditions, but many Civic bushings run 80,000–150,000 km. Frequent rough roads, heavy loads, or lots of stop-start city driving tend to shorten that window. If there’s noise, wandering, or uneven tyre wear, an inspection is due regardless of kilometres.

Do I need an alignment after replacing a control arm?
Yes. Any time a control arm is removed or replaced—front or rear—have a full alignment done. It restores camber and toe to spec, protects tyre life, and brings back the Civic’s precise steering feel.

Can worn control arms cause uneven tyre wear?
They can. Excess play in a ball joint or collapsed bush can push camber or toe out of spec, which scuffs tyres on the inner or outer edges. Fixing the arm and following up with an alignment usually sorts the wear pattern.