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Brake Fluid Flush Interval for Polestar 2 - What's the schedule?

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Paul Z. · rep 0 · May 22, 7:53 AM · 1 replies · solved · Question

Vehicle: 2022 Polestar 2 Long Range Dual Motor

Hey everyone,

I've got a 2022 Polestar 2 Long Range Dual Motor and I'm trying to get a handle on the maintenance schedule, specifically for the brake fluid. I know EVs use regenerative braking a lot, which means the friction brakes aren't used as heavily as in an ICE car.

Does this change the recommended interval for a brake fluid flush? I'm used to a 2-year interval on my old car, but I'm wondering if it's different for the Polestar. What are other owners doing? Is this something I can tackle myself or is it best left to the dealership?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 7:53 AM

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ClearTheCode admin answer:

You're right to be thinking about brake fluid maintenance, Sarah! While EVs like your 2022 Polestar 2 utilize regenerative braking, which reduces wear on friction components, the brake fluid itself still degrades over time by absorbing moisture. This moisture lowers the fluid's boiling point, which can lead to a spongy pedal feel and reduced braking performance, especially under heavy use.

Here's what you need to know:

  1. Recommended Interval: Polestar, like many manufacturers, typically recommends a brake fluid flush every 2 years, regardless of mileage. This interval is crucial because the fluid's hygroscopic nature (its ability to absorb water) is time-dependent, not mileage-dependent.
  2. Why it's Important: Moisture in the brake fluid can also lead to corrosion within the brake lines, calipers, and ABS module over time, which can be very costly to repair.
  3. DIY vs. Professional: While a brake fluid flush can be a DIY task, it requires specific tools (like a pressure bleeder or vacuum bleeder) and knowledge of the correct bleeding sequence, especially with modern ABS systems. For Polestar vehicles, it's often recommended to have it done by a certified technician who can ensure proper fluid replacement and system integrity, potentially using diagnostic tools to cycle the ABS pump if necessary.
  4. Fluid Type: Always use the manufacturer-specified DOT fluid type, which is typically DOT4 for Polestar vehicles. Using the wrong fluid can damage seals and compromise braking performance.
  5. When to See a Shop: If you notice a soft or spongy brake pedal, a warning light on your dash (like a general 'Brake System Malfunction' or low fluid level warning), or if your fluid looks dark and murky when checking the reservoir, it's definitely time to visit a professional. While there isn't a specific OBD-II code for 'old brake fluid,' a low fluid level sensor might trigger a warning, or a technician might find related codes if there's a deeper issue.

Regular brake fluid maintenance is a critical safety item and ensures your Polestar's braking system remains reliable and effective.

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