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Brake Fluid Check & Flush for 2019 Model 3 Performance – What's the Schedule?

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Eric V. · rep 0 · May 22, 5:26 AM · 1 replies · solved · Question

Vehicle: 2019 Tesla Model 3 Performance

I've got a 2019 Tesla Model 3 Performance, and with all the regenerative braking, I rarely use the friction brakes. However, I know brake fluid is still important. What's the recommended maintenance schedule for checking and flushing the brake fluid on these cars? I haven't seen it explicitly called out in the same way as ICE vehicles.

Also, are there any signs I should look out for that would indicate the fluid needs attention sooner? I'm comfortable checking the reservoir, but a full flush seems like a job for a professional. Just want to make sure I'm not overlooking anything critical.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:26 AM

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ClearTheCode admin answer:

That's a very insightful question, David! While regenerative braking significantly reduces the wear on friction brake components, brake fluid maintenance remains crucial for your 2019 Model 3 Performance. Brake fluid is hygroscopic, meaning it absorbs moisture over time, which lowers its boiling point and can lead to corrosion in the brake system.

Tesla's Recommended Schedule: Tesla recommends checking the brake fluid level and condition annually, and performing a brake fluid flush and replacement every 2 years or 25,000 miles (40,000 km), whichever comes first. This is a standard recommendation across most modern vehicles, regardless of powertrain.

Why it's important:

  • Safety: Contaminated or old brake fluid can lead to a spongy pedal feel, reduced braking performance, and in extreme cases, brake fade, especially during hard braking or track use (relevant for a Performance model).
  • System Longevity: Moisture in the fluid can corrode internal brake components like calipers, master cylinder, and ABS module, leading to expensive repairs.

Signs the Fluid Needs Attention Sooner:

  • Spongy or Soft Brake Pedal: This is the most common symptom of air or excessive moisture in the brake lines.
  • Increased Stopping Distance: If your car isn't stopping as quickly as it used to.
  • Brake Warning Light: A warning light on your dashboard (though less common for just old fluid, more for low fluid or system fault).
  • Dark or Cloudy Fluid: While you can check the reservoir, the fluid there might look okay even if the fluid deeper in the lines is degraded. New DOT 4 brake fluid is typically clear or light amber.

DIY Check vs. Professional Flush:

  • DIY Check: You can easily check the brake fluid level in the reservoir under the frunk. Ensure it's between the MIN and MAX lines. If it's low, it could indicate a leak or worn brake pads (though less likely with regen braking). You can also visually inspect the fluid's color, but this isn't a definitive test of its moisture content.
  • Professional Flush: A full brake fluid flush involves bleeding the old fluid out of each caliper and replacing it with fresh fluid. This is an advanced DIY task that requires specific tools (e.g., pressure bleeder, vacuum pump) and knowledge to ensure no air enters the system and the ABS module is properly cycled (often requiring diagnostic tools). For your Model 3 Performance, it's highly recommended to have this service performed by a Tesla Service Center or a reputable independent shop specializing in Teslas. They have the correct fluid (DOT 4) and equipment to perform the flush safely and effectively, ensuring your braking system remains in optimal condition.
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