Parts for your 2010 Lexus Is-Control arms

2010 Lexus IS Control Arms — What They Do and When to Replace

Control arms are absolutely used on the 2010 Lexus IS. Technical sources including the Lexus IS New Car Features (NCF) for the XE20 platform, the Lexus Repair Manual (Chassis – Suspension), and the Toyota Electronic Parts Catalogue all show a double-wishbone front suspension with upper and lower control arms, plus a multi‑link rear setup with multiple control arms/links. So yes—control arms are relevant to this model, front and rear.

On a 2010 Lexus IS, the control arms locate each wheel to the body and let the suspension move in a controlled arc. They set and stabilise key alignment angles (camber and caster), manage loads during cornering and braking, and use rubber or hydraulic bushes to keep road harshness down. Ball joints on certain arms allow smooth pivoting while the car steers and rides over bumps. The end result is the tidy steering feel and planted handling that keen drivers expect from an IS.

Over time, bushes can crack or soften and ball joints can loosen, especially with Aussie and Kiwi roads, speed bumps, and the odd gravel detour. A quick suspension check every 20,000 km as part of regular servicing is a smart move. Many owners see control arm bushes or complete arms due anywhere from 120,000–200,000 km, sooner if the car sees rough roads or spirited driving.

• Common signs they’re due: clunks over bumps, knock on take-off/braking, steering wander, vibration under braking, or uneven tyre wear.
• Visual clues: torn or leaking bushes (some are hydraulic), split ball joint boots, rust around bushing sleeves, or shifted cam bolts.

When replacing, it’s good practice to do both sides on the same axle to keep handling balanced. Torque all pivot bolts at normal ride height (with the vehicle’s weight on the wheels) so the bushes aren’t preloaded. Always follow the Lexus workshop manual for torque specs and procedures, and replace any single‑use hardware like cam bolts and lock nuts. A four‑wheel alignment is required afterwards—front camber/caster and rear camber/toe are all affected by arm changes.

• Choosing parts: quality OE or reputable aftermarket arms are fine, complete arms can save time vs pressing bushes.
• While you’re there: check sway bar links, tie rod ends and strut top mounts, tired mates can mask or mimic arm wear.

Popular questions about 2010 Lexus IS control arms

How long do control arm bushes last on a 2010 Lexus IS?
In typical Aussie/NZ driving, many last 120,000–200,000 km. Heat, road quality and driving style matter—city kerbs, potholes and track days bring that forward. Regular checks can catch early cracking or fluid seep (on hydraulic bushes) before it affects tyres and alignment.

Do I need a wheel alignment after replacing control arms?
Yes. The IS uses adjustable cam bolts and multi‑link geometry, so swapping arms or bushes changes alignment. Book a proper four‑wheel alignment straight after the job to protect tyres and restore steering feel.

Can I replace just the bushes, or do I need the whole arm?
Both options exist. Pressing in bushes needs the right tooling and care to orient them correctly. Many owners pick complete arms for fresh bushes and ball joints in one go, saving time and avoiding press-fitting mistakes.