The 2021 Polestar 2 shares its CMA platform and electric drivetrain with Volvo's EV lineup, bringing sophisticated Swedish engineering but also some teething issues in early production runs. Most problems center around the 12V electrical system, drive unit seals, and thermal management components rather than the battery pack itself.
12V Battery Premature Failure and Associated Electrical Gremlins
Common · high severityTypical onset: 20,000-50,000 mi
Symptoms: Vehicle won't wake from sleep mode, Infotainment black screen on startup, Unable to shift out of Park, Key fob not recognized, Complete loss of all vehicle functions
Fix: The undersized 12V auxiliary battery drains prematurely, often taking out the DC-DC converter with it. Requires 12V battery replacement (sometimes under warranty extension) plus DC-DC converter testing/replacement. 2-4 hours labor depending on converter involvement. Polestar issued a service campaign but many units still affected.
Estimated cost: $400-1,800
Drive Unit Oil Leaks from Seal Failures
Occasional · medium severityTypical onset: 30,000-70,000 mi
Symptoms: Visible fluid puddles under vehicle (pink/red fluid), Grinding or whining noise from front or rear drive unit, Low fluid warning on dash, Reduced propulsion power message
Fix: Output shaft seals on the drive units fail, leaking the specialized transmission fluid. Requires drive unit removal, seal replacement, and fluid refill with expensive Volvo/Polestar-spec fluid. Front unit is 6-8 hours, rear unit on dual-motor cars is 5-7 hours. Some units need complete rebuilds if run low on fluid.
Estimated cost: $1,200-3,500
Heat Pump Compressor and Refrigerant System Failures
Occasional · medium severitySymptoms: Intermittent cabin heating in cold weather, AC blows warm air, Significant range loss in winter, Compressor clutch clicking or grinding, Climate system error messages
Fix: The heat pump system (standard on most 2021s) has compressor failures and refrigerant leaks, particularly at the evaporator connections. AC evaporator replacement requires complete dash removal (12-16 hours). Compressor replacement is 4-6 hours. This is a complex system critical for EV range in cold climates.
Estimated cost: $2,800-6,500
Inverter Coolant Leaks and Overheating
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Powertrain overheating warnings, Reduced power or limp mode, Pink coolant visible under vehicle, High voltage system fault codes, Check electric propulsion system message
Fix: Inverter coolant system develops leaks at hose connections or internal passages, leading to overheating and potential inverter failure. Inverter R&R is 5-7 hours, requires high-voltage isolation procedures and special coolant. If inverter is damaged from overheating, replacement unit is $4,000-6,000 in parts alone.
Estimated cost: $1,500-8,000
Transmission Mount Failures Causing Vibration
Common · low severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking when accelerating or decelerating, Excessive vibration at highway speeds, Thud when engaging Drive or Reverse, Visible torn rubber on motor mounts
Fix: The drive unit mounts (often called transmission mounts in service manuals) deteriorate faster than expected, especially on dual-motor AWD variants. Replacement is straightforward but requires supporting the drive unit properly. 2-3 hours per mount, front mount accessed from above, rear from below.
Estimated cost: $400-900
Software-Related Charging Issues and BMS Glitches
Occasional · medium severitySymptoms: DC fast charging limited to 40-50 kW unexpectedly, Charging stops prematurely at public chargers, Battery percentage jumping or freezing, Inaccurate range estimates after charging, Battery conditioning not activating in cold weather
Fix: Battery management system software bugs cause charging anomalies that often resolve with OTA updates or dealer reflashing. Some cases require high-voltage battery module inspection or replacement if cell balancing is permanently affected. Diagnosis is 1-2 hours, software updates are typically warranty-covered. Module replacement is 8-12 hours.
Estimated cost: $200-5,000
Buy a 2022+ model year after the early bugs were sorted, or budget $2,000-3,000 for potential 12V system and seal repairs on a 2021 — the driving experience is excellent but first-year production quality shows.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.