Parts for your 2004 Toyota Highlander-Control arms

2004 Toyota Highlander control arms — what they do, and when to replace them

Control arms are absolutely used on the 2004 Toyota Highlander. Technical references including Toyota’s Repair Manual for the 2001–2007 Highlander (XU20), the Toyota Electronic Parts Catalogue (EPC), and general service guides such as Haynes confirm a MacPherson strut front suspension with a single lower control arm and ball joint per side. The rear suspension is independent with trailing arms and lateral links, these are often referred to as rear control arms in parts catalogues.

On this model, the front lower control arms anchor the bottom of the steering knuckle to the subframe, set key alignment angles, and allow the strut to move up and down while keeping the wheel tracking straight. Rubber bushes at the chassis end soak up vibration and noise, while the ball joint at the wheel end lets the knuckle pivot for steering. They cop big loads under braking, cornering, and over rough roads, so when the bushes or ball joint wear out, the vehicle can feel loose or skittish.

Good upkeep is simple and pays off. As part of routine servicing, a visual inspection every 20,000–30,000 kilometres (or yearly) is smart. Look for split or oil-soaked bushes, cracked rubber, torn ball joint boots, rust around arm welds, and any shiny metal where components have been rubbing. Tell-tales include clunks over bumps, steering wander, uneven tyre wear on the inside edges, vibration under braking, or a vague, tramlining feel through the wheel.

When replacement time comes, many choose complete arms with pre-fitted bushes and ball joints to save time and ensure everything matches. It’s best practice to replace control arms in axle pairs, torque all pivot bolts at normal ride height to avoid preloading the bushes, and use new self-locking nuts on the ball joint. A wheel alignment is essential afterwards to dial camber and toe back into spec. While the arms are off, it’s worthwhile checking sway bar links, inner and outer tie rods, and strut top mounts, as wear often shows up together. DIYers should support the vehicle securely on stands and never rely on a jack, if pressing bushes, use the correct drivers to avoid distorting the arm. Quality parts and correct torque go a long way towards a quiet, confidence-inspiring Highlander that tracks straight and treats its tyres kindly.

Popular questions

Does the 2004 Highlander have rear control arms?
The rear uses an independent strut layout with a trailing arm and multiple lateral links. Many catalogues group these as “rear control arms”. The front lower control arms are the most commonly serviced, but rear links and bushes can also wear and affect alignment and tyre life.

What are the symptoms of worn control arm bushes or ball joints?
Expect clunks over bumps, steering shimmy or wander, uneven tyre wear, and a thud when braking or accelerating. A split ball joint boot, perished bushes, or excessive movement during a pry-bar check are strong signs it’s time to replace.

Do you need a wheel alignment after replacing control arms?
Yes. Changing control arms alters camber and toe. A professional alignment ensures proper handling, even tyre wear, and correct steering-centre on the 2004 Highlander.