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Shock absorber bushing

Toyota - ST171 - Lower Arm Bush 48068-20200
Shock absorber bushing

Toyota - ST171 - Lower Arm Bush 48068-20200

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  • Toyota - ST171 - Lower Arm Bush 48068-20200
  • Toyota - ST171 - Lower Arm Bush 48068-20200

Description


1. What is the Lower Arm Bush?

  • Location: It's a rubber or polyurethane component pressed into the front lower control arm (or "lower wishbone").

  • Function: Its primary job is to allow controlled movement for the lower control arm. It pivots to allow the wheel to move up and down over bumps while also resisting fore-aft movement to keep the wheel alignment (specifically the caster and toe) stable.

  • Importance: A healthy bush ensures precise steering, good stability at high speeds, and prevents premature tire wear.

2. Common Symptoms of a Worn ST171 Lower Arm Bush

When these bushes wear out, you will likely notice one or more of the following:

  • Vague or Imprecise Steering: The steering feels loose, especially on the highway, and requires constant small corrections.

  • Knocking or Clunking Noises: A distinct "clunk" or "knock" from the front end when going over bumps, potholes, or during sharp turns.

  • Poor Stability Under Braking: The front of the car may feel like it's "wandering" or pulling to one side when you brake.

  • Excessive Vibration: Vibrations through the steering wheel or chassis, often caused by the altered geometry.

  • Accelerated Tire Wear: Worn bushes allow the wheel to move out of alignment, causing uneven tire wear, typically on the inner or outer edges.

  • Vehicle Pulling to One Side: While this can also be a brake or alignment issue, a severely collapsed bush can cause a persistent pull.



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