Parts for your 2017 Lexus Is-Ball joints

2017 Lexus IS ball joints — what they do and when to service them

Technical references including the Lexus IS (XE30, 2014–2019) Repair Manual via Toyota TIS (sections: Front Suspension — Front Lower Ball Joint, Front Upper Control Arm) and the Toyota/Lexus Electronic Parts Catalogue (EPC) for 2017 IS models confirm that the 2017 Lexus IS uses ball joints. The front suspension is a double wishbone setup with a bolt-on lower ball joint and an upper ball joint integrated into the upper control arm, the rear multi-link arrangement also employs spherical/ball-type joints in its links.

On a 2017 Lexus IS, the ball joints act like heavy-duty swivels, letting the wheels move up and down over bumps while steering smoothly left and right. They tie the steering knuckle to the control arms so the car tracks straight, steers precisely, and keeps tyre contact nice and even. When they’re in good nick, the Lexus feels planted and quiet, when they’re worn, handling gets vague and tyres can start wearing oddly.

As part of regular servicing in Australia and New Zealand, it’s smart to have the ball joints inspected every service or 15,000 km. A quick visual check of the dust boots for splits or grease seepage, plus a lever test for play, can catch issues before they snowball. Listen out for clunks over speed bumps, steering wander, or a knocking that changes with suspension movement — all classic clues the joints are on the way out.

Replacement is straightforward for the front lower ball joint as it’s a separate, bolt-on part. The front upper ball joint is built into the upper control arm, so that side is typically replaced as a complete arm assembly. Best practice includes:

• Use quality OEM-equivalent parts and new hardware.
• Torque fasteners with the suspension at ride height to avoid bush pre-load.
• Book a wheel alignment afterwards to protect tyres and restore steering feel.
• Check related items (tie rod ends, control arm bushes, sway bar links) at the same time.

Driving on rough roads, carrying loads, or frequent kerb hits can shorten ball joint life. Many owners see 100,000–200,000 km before attention’s needed, but periodic checks keep you ahead of any WOF or rego surprises and maintain that tidy Lexus road feel.

Popular questions about 2017 Lexus IS ball joints

How long do the ball joints typically last?
With normal city and motorway driving, many 2017 IS ball joints will go 100,000–200,000 km. Rough rural roads, potholes, big wheels/low-profile tyres, or frequent kerb knocks can bring that figure down. Regular inspections help you pick up boot damage and light play before it affects tyres or steering.

Can I replace just the ball joint, or do I need the whole control arm?
The front lower ball joint on the IS is a separate, bolt-on unit and can be replaced on its own. The front upper joint is integrated into the upper control arm, so that side is usually serviced by fitting a complete arm. Many techs recommend doing both sides (left/right) together to keep handling even.

Do I need a wheel alignment after replacing ball joints?
Yes. Any work on ball joints or control arms can shift camber and toe. A proper alignment after the job preserves tyre life and brings back the crisp steering feel the IS is known for.