Parts for your 2005 Lexus Is-Control arms

2005 Lexus IS control arms: what they do and when to replace them

Control arms are absolutely used on the 2005 Lexus IS. Both the late first‑generation IS200/IS300 (XE10) still on sale in early 2005 and the second‑generation IS250/IS350 (XE20) introduced later in 2005 are built around wishbone/multi‑link suspension that relies on upper and lower control arms. Technical sources confirming this include:

• Lexus IS (GSE20) New Car Features manual – Suspension: double‑wishbone front and multi‑link rear with multiple control arms
• Lexus IS200/IS300 Repair Manual (GXE10/JCE10) – Suspension: double‑wishbone front and rear using upper and lower arms
• Toyota/Lexus Electronic Parts Catalogue (EPC) listings for 2005 IS: Front Upper Arm, Front Lower Arm, Rear Upper/Lower Arms and Toe Control Arm

On a 2005 Lexus IS, the control arms are the hinged links that tie each wheel hub to the chassis subframe. Working with ball joints and rubber bushes, they let the wheel move up and down smoothly while keeping the alignment angles (camber and caster) where they should be. That’s why the car feels planted through corners and why the tyres wear evenly when everything’s healthy.

Over time, the arm bushes can crack or split, and ball joints can loosen. Typical signs include clunks over bumps, vague steering, shudder when braking, and inside‑edge tyre wear. In Aussie and Kiwi conditions, it’s smart to inspect the arms and bushes every 20,000 km or 12 months as part of routine servicing.

Service tips for owners and workshops:

• Check bush condition (cracks, separation, leaking fluid on hydro‑bushes) and ball joint play, torn dust boots need attention.
• Replace arms in pairs across an axle if wear is similar. Quality OEM or reputable aftermarket arms/bushes make a difference in steering feel and longevity.
• Always torque control‑arm bolts with the vehicle at normal ride height to avoid pre‑loading the bushes.
• Book a wheel alignment straight after any arm or bush replacement, camber and toe can shift even if the arms aren’t “adjustable”.
• If chasing a steering knock on XE20 cars, don’t forget to check the rear toe arms and front lower arm rear bushes, which are common culprits.

With fresh bushes and tight ball joints, a 2005 IS keeps that crisp Lexus turn‑in and quiet, composed ride that owners love—plus it saves tyres and keeps safety systems like ABS and stability control working at their best.

Does a 2005 Lexus IS have upper and lower control arms?

Yes. The front uses an upper and lower wishbone (control arm) layout, while the rear uses multiple links that include control arms (and a toe arm) depending on the exact model. Both the late XE10 and early XE20 cars sold in 2005 are built this way.

How long do control‑arm bushes last on a 2005 IS?

Many see 100,000–150,000 km, but rough roads, heat, and age can shorten that. If there’s clunking, wandering, or uneven tyre wear, get them checked sooner. A quick annual inspection under the car is cheap insurance.

Do I need a wheel alignment after replacing control arms?

Definitely. Even if the new arms bolt straight in, small geometry changes affect camber and toe. An alignment protects your tyres and restores that precise Lexus steering feel.