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Brake Fluid Flush for 2022 Polestar 2 - What's the Schedule?

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Christine P. · rep 0 · May 22, 7:53 AM · 1 replies · solved · Question

Vehicle: 2022 Polestar 2 Single Motor

Hey everyone,

I've got a 2022 Polestar 2 Single Motor, and it's coming up on its two-year mark. I'm trying to stay on top of all the recommended maintenance, and I was wondering about the brake fluid flush. Is there a specific schedule for Polestar EVs, or is it similar to traditional ICE cars?

I've noticed the brake pedal feeling a little softer than usual lately, though there aren't any warning lights on the dash. I'm curious if this is something I can tackle myself in my garage, or if it's definitely a dealer-only job given the regenerative braking system and all the electronics. Any advice from other 2022 Polestar 2 owners would be great!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

Maintaining your brake fluid is crucial for your 2022 Polestar 2, even with its advanced regenerative braking system. While regenerative braking reduces the mechanical brake's workload, the hydraulic system still needs regular attention.

  1. Recommended Schedule: Polestar, like many manufacturers, typically recommends a brake fluid flush every two years, regardless of mileage. This is because brake fluid is hygroscopic, meaning it absorbs moisture over time. Moisture lowers the fluid's boiling point, which can lead to a spongy pedal feel and reduced braking efficiency, especially under heavy use.
  2. Fluid Type: Your Polestar 2 uses DOT 4 brake fluid. Always ensure you use the correct specification fluid to maintain system integrity and performance.
  3. DIY vs. Professional: While a basic brake fluid bleed might seem straightforward, modern vehicles like the Polestar 2 have complex ABS (Anti-lock Braking System) and ESC (Electronic Stability Control) modules. These systems often require a diagnostic tool to properly cycle the ABS pump during the bleeding process to ensure all old fluid is removed and no air is trapped. Attempting a DIY flush without the proper tools can lead to air in the system, compromising braking performance.
  4. Symptoms and Causes: A 'soft' or 'spongy' brake pedal, as you described, is a classic symptom of old, moisture-laden brake fluid or air in the brake lines. While no warning lights are present, it's a clear indicator that the fluid's integrity might be compromised.
  5. When to See a Shop: Given the complexity of bleeding the ABS/ESC system on your Polestar 2, it is highly recommended to have this service performed by a qualified Polestar service center or an independent shop with the necessary diagnostic equipment. They can ensure a thorough flush and proper system function, which is paramount for your safety.
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