The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Spongy Brake Pedal & Brake Fluid Flush on 2021 Kona Ultimate

0

David L. · rep 0 · May 25, 2:04 AM · 1 replies · solved · Question

Vehicle: 2021 Hyundai Kona Ultimate

Hi everyone, I've got a 2021 Hyundai Kona Ultimate with about 30,000 miles on it. Lately, I've noticed the brake pedal feels a bit 'spongy' or soft compared to when it was new. The car still stops, but it doesn't feel as firm or responsive as it used to. I haven't noticed any leaks.

I'm wondering if it's time for a brake fluid flush. I know it's often an overlooked maintenance item. What's the recommended interval for a brake fluid flush on these newer Konas? Is this something I can tackle myself, or is it better to have a shop do it, especially with ABS and other modern brake systems?

Any insights would be great!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:04 AM

0

ClearTheCode admin answer:

A spongy brake pedal on your 2021 Hyundai Kona Ultimate at 30,000 miles, without visible leaks, strongly suggests that your brake fluid may be contaminated or has absorbed too much moisture. A brake fluid flush is likely a good idea.

  1. Why Brake Fluid Degrades: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the fluid's boiling point, leading to vapor bubbles forming under hard braking (causing a spongy pedal) and can also lead to internal corrosion in the brake lines and components.
  2. Recommended Interval: Hyundai typically recommends a brake fluid flush every 2-3 years or 30,000-45,000 miles, whichever comes first. Your 2021 Kona is right in that timeframe.
  3. DIY vs. Professional:
    • DIY: A brake fluid flush can be a DIY job, but it requires specific tools (like a pressure bleeder or a vacuum bleeder) and careful attention to detail to ensure no air gets into the system. You'll also need to know the correct bleeding sequence for your vehicle.
    • Professional: For modern vehicles with ABS and other electronic brake components, a professional flush is often recommended. Shops have specialized equipment that can cycle the ABS pump during the flush, ensuring all old fluid is removed, including from the ABS module. This prevents potential issues and ensures proper bleeding.
  4. When to See a Shop:
    • If you're not confident in your DIY abilities.
    • If the pedal feels extremely soft, goes to the floor, or if you suspect a leak despite not seeing one (e.g., fluid level dropping rapidly).
    • If the car has been sitting for a long time or subjected to extreme conditions. A professional can also test the fluid for moisture content to confirm its condition.

Addressing this promptly will restore your braking performance and prevent more costly repairs down the line.

Menu

Help & account