The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2023 Carnival SX Prestige rear suspension feels bouncy/saggy

0

Mike T. · rep 0 · May 25, 2:08 AM · 1 replies · solved · Question

Vehicle: 2023 Kia Carnival SX Prestige

I recently got a 2023 Kia Carnival SX Prestige, and I've noticed the rear suspension feels a bit too bouncy, almost saggy, especially when I have a few passengers or some cargo in the back. It just doesn't feel as stable as it should, and I can feel the rear dipping more than I'd expect over bumps.

Given it's a new vehicle, I'm surprised by this. Is this normal for a minivan, or could something already be wrong with the shocks or springs? What should I look for, or is this something I should take back to the dealership under warranty?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:08 AM

0

ClearTheCode admin answer:

It's concerning to experience a bouncy or saggy rear suspension in a relatively new 2023 Kia Carnival SX Prestige, especially a vehicle designed to carry passengers and cargo. While minivans are inherently softer riding, excessive bounciness or sagging is not normal and indicates a potential issue.

Here are the common causes for these symptoms:

  1. Worn or Defective Rear Shocks/Struts: Even on a new vehicle, a manufacturing defect in a shock absorber can cause it to fail prematurely. Shocks are designed to dampen spring oscillations; if they're not working correctly, the vehicle will feel bouncy and unstable, especially over bumps or with added weight.
  2. Broken or Weakened Coil Springs: While rare on a new vehicle, a coil spring could be defective or even broken, especially if there was an impact or manufacturing flaw. A broken spring will cause noticeable sagging and a very poor ride quality.
  3. Overloading: Ensure you are not exceeding the vehicle's Gross Vehicle Weight Rating (GVWR) or the rear axle's Gross Axle Weight Rating (GAWR), which can be found on a sticker in your door jamb. While the Carnival is designed for capacity, exceeding limits will always cause sagging and strain components.
  4. Suspension Bushings: Worn or defective rubber bushings in the suspension linkages can lead to excessive play, contributing to a loose or unstable feel. However, this usually manifests as noise rather than just bounciness/sagging.
  5. Tire Pressure: While not a suspension component, incorrect tire pressure (especially underinflation) can significantly impact ride quality and stability. Ensure your tires are inflated to the manufacturer's recommended pressures, found on the door jamb sticker.

When to See a Shop: Since your Kia Carnival is a 2023 model, it is almost certainly still under its factory warranty. You should:

  • Schedule an appointment with your Kia dealership immediately. Explain the symptoms clearly.
  • Do not attempt to diagnose or repair this yourself, as it could void your warranty or cause further damage.
  • The dealership will inspect the rear suspension components (shocks, springs, bushings) for defects or damage. They can also check for any service bulletins related to suspension issues for your specific model year. This issue should be covered under warranty if a defect is found.
Menu

Help & account