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Squeaky Front Suspension on 2017 IS 350 F Sport

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Eric V. · rep 0 · May 22, 4:46 AM · 1 replies · solved · Question

Vehicle: 2017 Lexus IS 350 F Sport

Hey Lexus owners,

I've got a persistent and annoying squeak coming from the front end of my 2017 Lexus IS 350 F Sport. It's most noticeable when I go over speed bumps, uneven pavement, or even when turning at low speeds. It sounds like a rubber-on-metal squeak, and it's driving me crazy.

The car has about 60,000 miles on it. I haven't hit any major potholes recently, and the steering feels fine, no pulling or looseness. I'm wondering if this is a common issue for the IS 350, especially the F Sport models with their stiffer suspension.

What are the usual culprits for front suspension squeaks on these cars? And what kind of repair costs should I expect if I take it to a shop? Any DIY checks I can do first?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:46 AM

0

ClearTheCode admin answer:

A squeaky front suspension on a 2017 Lexus IS 350 F Sport, especially at 60,000 miles, points to common wear-and-tear components. Here are the most likely culprits:

  1. Control Arm Bushings: These rubber components isolate the control arms from the chassis. Over time, they can dry out, crack, or wear down, leading to squeaking, especially over bumps. This is a very common source of suspension noise.
  2. Sway Bar Bushings/End Links: The sway bar (or anti-roll bar) helps reduce body roll. Its bushings can dry out and squeak, and the end links (which connect the sway bar to the suspension) can wear out, causing clunking or squeaking noises.
  3. Ball Joints: These allow for steering and suspension movement. Worn ball joints can cause squeaking, clunking, and eventually looseness in the steering.
  4. Strut Mounts/Bearings: The top mount of the strut assembly can wear out, leading to noise, particularly when turning the steering wheel or going over bumps.
  5. Coil Springs (Less Common): Sometimes, the coil springs themselves can rub against their seats if they're not properly aligned or if the isolators are worn.

DIY Checks:

  • Visual Inspection: With the car safely on jack stands, visually inspect all rubber bushings for cracks, tears, or excessive wear. Look for any signs of rust or corrosion around suspension components.
  • Lubrication (Temporary Fix): A temporary fix for rubber bushings can be to spray them with a silicone-based lubricant (avoid petroleum-based products as they can degrade rubber). This might quiet the squeak for a short period, confirming the bushing as the source.
  • Bounce Test: Push down firmly on each corner of the car. If it bounces excessively or you hear the squeak, it could indicate worn struts or mounts.

When to See a Shop:

  • If the DIY checks don't identify the source or provide a solution.
  • If you notice any looseness in the steering or unusual tire wear.
  • Suspension components are critical for safety. A professional technician can accurately diagnose the source of the squeak and recommend the appropriate repair. Repair costs can vary widely depending on which component needs replacement, from a few hundred dollars for sway bar links to potentially over a thousand for control arms or struts.
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