When to Flush Brake Fluid on 2019 Outlander GT?

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Mark S. · rep 0 · May 22, 5:36 AM · 1 replies · solved · Question

Vehicle: 2019 Mitsubishi Outlander GT

Hi everyone,

I've got a 2019 Mitsubishi Outlander GT with about 55,000 miles on it. I've been pretty good about oil changes and tire rotations, but I realized I've never thought about the brake fluid. I'm wondering what the recommended interval is for a brake fluid flush on these vehicles.

Are there any signs I should look out for that indicate it's time for a flush? Also, is this a DIY job for someone with basic tools and a bit of mechanical experience, or is it better left to the pros? I'm trying to keep up with all the maintenance myself if possible. Thanks for any advice!

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ClearTheCode Admin

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ClearTheCode admin answer:

  1. Brake Fluid Flush Interval: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the fluid's boiling point, which can lead to a spongy brake pedal or even brake fade under heavy braking. It also causes internal corrosion in the brake lines and components.

    • For most vehicles, including your 2019 Mitsubishi Outlander GT, a brake fluid flush is recommended every 2 to 3 years or 30,000 to 45,000 miles, whichever comes first. Always check your owner's manual for the specific Mitsubishi recommendation.
  2. Signs It's Time for a Flush:

    • Dark or Cloudy Fluid: New brake fluid is typically clear or light amber. If your fluid in the reservoir looks dark brown or black, it's definitely time for a flush.
    • Spongy or Soft Brake Pedal: While this can indicate other issues, old, moisture-laden fluid can contribute to a less firm pedal feel.
    • Brake System Warning Light: Although less common for just old fluid, any brake warning light should prompt immediate inspection.
  3. DIY Considerations: A brake fluid flush can be a DIY job, but it requires careful attention to detail and proper technique. Here's what's involved:

    • Fluid Type: Your Outlander likely uses DOT3 or DOT4 brake fluid. Always use the type specified in your owner's manual and never mix different types.
    • Bleeding Sequence: You'll need to bleed the brakes starting with the wheel furthest from the master cylinder and working your way closer (typically passenger rear, driver rear, passenger front, driver front).
    • Tools: You'll need a wrench for the bleed nipples, a clear hose, a collection bottle, and either a second person to pump the brake pedal or a pressure/vacuum bleeder tool.
    • Maintain Reservoir Level: Crucially, never let the master cylinder reservoir run dry during the process, as this will introduce air into the system, making the job much harder.
  4. When to See a Shop:

    • If you're not confident in your ability to perform the flush correctly, or if you don't have a second person to assist, it's best to take it to a professional. Introducing air into the brake lines can lead to a complete loss of braking power.
    • Modern vehicles with ABS (Anti-lock Braking System) and stability control systems sometimes require a diagnostic tool to cycle the ABS pump during bleeding, especially if the master cylinder or ABS module has been replaced. While usually not necessary for a standard flush, a shop will have this capability if needed.