The 2021 Dacia Spring is a budget-focused Chinese-platform EV (rebadged Renault City K-ZE) with a 27kWh battery and minimal range. Its main issues stem from cost-cutting in suspension components and early-generation BMS/thermal management quirks rather than traditional powertrain failures.
Front Lower Control Arm Bushing Premature Wear
Common · medium severityTypical onset: 25,000-45,000 mi
Symptoms: Clunking over bumps at low speed, Steering wander or vague feel, Uneven inner tire wear, Vibration through steering wheel on rough pavement
Fix: Replace both lower control arm bushings as a pair, sometimes requires full arm replacement if bushings aren't serviceable separately. 2.5-3.5 hours labor for both sides including alignment. Budget bushings fail early; aftermarket upgrades help.
Estimated cost: $400-750
Battery Thermal Management System Faults
Occasional · high severitySymptoms: Reduced charging speed with no obvious cause, "Battery temperature too high" warning in summer heat, Sudden range loss (15-20% drop), Refusal to accept DC fast charge
Fix: Usually a failed coolant pump or temperature sensor in the battery pack thermal loop. Diagnosis requires factory scan tool to read BMS codes. Pump replacement is 3-4 hours; sensor replacement 1.5-2 hours. Renault/Dacia parts availability is poor in North America.
Estimated cost: $800-1,400
ABS Pump/Module Failure
Occasional · high severityTypical onset: 35,000-60,000 mi
Symptoms: ABS and traction control warning lights constant, Loss of regenerative braking force, Soft brake pedal feel, Grinding noise from ABS unit during normal braking
Fix: Internal corrosion or motor failure in the ABS hydraulic unit. Replacement is straightforward (2 hours labor) but the part is expensive and often backordered. Must be coded to the vehicle. Bleeding the system is critical—air in regen brake circuits causes dangerous pedal fade.
Estimated cost: $1,800-2,800
Rear Trailing Arm Bushing Collapse
Common · medium severityTypical onset: 30,000-50,000 mi
Symptoms: Rear-end feels loose or skippy over bumps, Clunking from rear when reversing or braking, Rear tire camber visibly negative, Accelerated rear tire wear on inside edge
Fix: Trailing arm bushings are undersized for the vehicle weight (battery is heavy for this class). Both sides typically fail within 5,000 mi of each other. 2-2.5 hours labor per side; press-out/press-in job. Aftermarket polyurethane bushings last longer but transmit more NVH.
Estimated cost: $350-600
Front CV Axle Boot Tears and Axle Failure
Occasional · medium severityTypical onset: 40,000-70,000 mi
Symptoms: Clicking or popping during tight turns, Grease visible on inside of wheel, Vibration during acceleration, Clunking when shifting from drive to reverse
Fix: Instant torque from the electric motor is hard on CV joints; boots tear from flex fatigue. Once torn, dirt kills the joint fast. Replace the entire axle rather than reboot—labor is similar (1.5 hours per side) and rebuilt axles are cheap. OEM axles are better balanced than most aftermarket.
Estimated cost: $250-450
12V Auxiliary Battery Premature Death
Common · medium severitySymptoms: Vehicle won't wake up or start despite main battery charged, Accessory electronics glitching or resetting, "12V system fault" message, Clicking from under hood when trying to power on
Fix: The DC-DC converter charges the 12V battery from the main pack, but the battery is undersized and cheap (standard lead-acid). Fails in 2-3 years especially if the car sits unused. Replacement is simple (0.5 hours) but requires a battery with the correct discharge profile. AGM or lithium 12V upgrades help longevity.
Estimated cost: $150-300
Buy only if you're handy with suspension work and have access to Renault parts channels—budget EV with budget durability, but mechanically simple enough for a DIY-er to keep running cheaply.
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.