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Inconsistent Regenerative Braking and Front End Clunk on my Polestar 2

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Mike T. · rep 0 · May 25, 5:22 AM · 1 replies · solved · Question

Vehicle: 2022 Polestar 2 Long Range Dual Motor

Hey everyone,

I've been noticing some really inconsistent regenerative braking on my 2022 Polestar 2 Long Range Dual Motor. Sometimes it feels really strong, almost to the point of being jerky, and other times it barely seems to engage, even with the setting on 'Standard'. It's making smooth driving a bit challenging.

Adding to that, I've started hearing a subtle but noticeable clunking sound from the front end, especially when going over small bumps or uneven pavement at low speeds. It almost feels like something is loose. I'm worried these issues might be related or indicate a bigger problem.

Has anyone else experienced similar issues with their Polestar 2? What was the cause, and how did you get it resolved? Any advice would be greatly appreciated before I take it into the service center.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 5:22 AM

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ClearTheCode admin answer:

Inconsistent regenerative braking and front-end clunking can be concerning. Here's a breakdown of potential causes and what to do:

Regenerative Braking Inconsistency

  1. Software Glitch: The most common cause for inconsistent regen braking in EVs is a software anomaly. Polestar regularly releases over-the-air (OTA) updates that can affect powertrain and braking performance. Ensure your vehicle's software is up to date.
  2. Brake System Sensor Issues: The regen system works in conjunction with the traditional friction brakes. If sensors related to wheel speed (ABS sensors) or brake pedal position are malfunctioning, it can lead to erratic regen behavior. This might not always trigger an immediate dashboard warning.
  3. Battery State of Charge/Temperature: Regenerative braking effectiveness can be reduced if the battery is fully charged (nowhere to send the energy) or if it's extremely cold, as the battery management system (BMS) limits charging current to protect the battery.

Front End Clunking

  1. Sway Bar Links/Bushings: These are common wear items. Worn or loose sway bar end links or bushings can cause a clunking noise, especially over bumps or during turns, as the suspension components shift.
  2. Control Arm Bushings: Deteriorated control arm bushings can also lead to clunking sounds and a general feeling of looseness in the front suspension.
  3. Strut Mounts: Worn strut mounts can produce a clunk or thud, particularly when the suspension compresses or extends rapidly.
  4. Brake Caliper Play: Less common, but sometimes a loose brake caliper or worn caliper pins can cause a subtle clunk, especially if the pads are shifting.

When to See a Shop:

  • Immediately: If the clunking becomes louder, more frequent, or if you notice any changes in steering feel, vehicle stability, or braking performance. A sudden loss of braking power or a warning light (like ABS or ESC) requires immediate attention.
  • Soon: For the inconsistent regen braking, if a software update doesn't resolve it, or if you suspect a sensor issue. For the clunking, it's best to have it inspected promptly to prevent further wear or potential safety hazards. A diagnostic scan at a Polestar service center can help identify any underlying electronic issues, even if no dashboard lights are on. They can also perform a thorough physical inspection of your suspension and braking components.
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