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2019 Q60 Red Sport 400 - Brake Fluid Flush Needed?

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Mike T. · rep 0 · May 25, 3:50 AM · 1 replies · solved · Question

Vehicle: 2019 Infiniti Q60 Red Sport 400

Hey everyone,

I've got a 2019 Infiniti Q60 Red Sport 400 with about 45,000 miles. Lately, the brake pedal feels a bit 'spongy' or less firm than it used to be. The car still stops, but it doesn't feel as responsive. I'm thinking it might be time for a brake fluid flush.

What's the recommended interval for brake fluid replacement on these performance Q60s? Is this something I can do myself with a friend, or is it better to have a shop handle it, especially with ABS? Any specific type of DOT fluid I should use?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 3:50 AM

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ClearTheCode admin answer:

A spongy brake pedal on your 2019 Infiniti Q60 Red Sport 400 at 45,000 miles is a classic symptom of old, contaminated brake fluid. A brake fluid flush is likely exactly what you need.

  1. Recommended Interval: Brake fluid is hygroscopic, meaning it absorbs moisture from the air over time. This moisture lowers the fluid's boiling point, leading to a spongy pedal feel, especially under hard braking, and can cause corrosion in the brake system. Infiniti generally recommends a brake fluid flush every 2 years or 30,000 miles, whichever comes first. At 45,000 miles and potentially 4-5 years old, your fluid is likely due.
  2. Causes of Spongy Pedal: The primary cause is water contamination in the brake fluid. When water boils, it creates compressible vapor pockets in the brake lines, leading to that 'spongy' or soft pedal feel. Air trapped in the lines can also cause this.
  3. DIY vs. Professional: A brake fluid flush can be a DIY job with the right tools (e.g., a pressure bleeder or vacuum bleeder) and a helper. However, it's crucial to ensure no air enters the system and to properly bleed all four wheels. For vehicles with ABS or stability control systems, some procedures may require a scan tool to cycle the ABS pump for a complete flush. If you're not experienced, or if you're uncomfortable with the process, a professional shop is recommended to ensure safety.
  4. Fluid Type: Always use DOT 3 or DOT 4 brake fluid as specified by Infiniti. DOT 4 has a higher boiling point and is often preferred for performance vehicles. Never mix DOT 3/4 with DOT 5 fluid, as they are incompatible.
  5. When to See a Shop: If the spongy pedal is accompanied by a warning light (like the brake system warning light), a sudden loss of braking power, or if you notice any fluid leaks around the calipers or master cylinder, have your vehicle inspected by a professional immediately. These could indicate more serious issues than just old fluid.
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