The 2014 Spark EV is GM's first mass-production pure electric using a surprisingly robust drivetrain co-developed with LG. Most issues center around aging high-voltage components, coolant system quirks, and typical EV battery degradation rather than catastrophic failures.
Battery Capacity Degradation & Cell Imbalance
Common · medium severityTypical onset: 70,000-100,000 mi
Symptoms: Reduced range (original ~82 mi EPA drops to 55-65 mi real-world), Charging stops at 90-95% instead of full, Battery capacity indicator shows yellow or red bars, Uneven cell voltage triggering reduced propulsion warnings
Fix: No practical repair exists—GM discontinued the 19 kWh pack and modules are unobtanium. Some shops attempt cell-level balancing (4-6 hours labor) which buys time but rarely restores more than 5-10% capacity. Reality: you live with it or part the car out.
Estimated cost: $400-800 for balancing attempt; full pack replacement theoretically $8,000-12,000 but unavailable
Electric Drive Unit Coolant Pump Failure
Occasional · high severityTypical onset: 60,000-120,000 mi
Symptoms: Reduced propulsion power message with turtle icon, Drive unit overheat warning on dash, Whining or grinding noise from under vehicle center-front, Coolant level repeatedly low with no visible external leaks
Fix: The electric coolant pump (part of the drive unit thermal management) fails internally. Requires dropping the subframe to access. 5-7 hours labor plus pump assembly. If caught early, no other damage; if driven hot, you risk inverter or motor controller damage adding thousands more.
Estimated cost: $1,200-2,000
On-Board Charger (OBC) Failure
Occasional · high severitySymptoms: Will not charge on Level 1 or Level 2 (DC fast charging may still work), Charging port light stays amber or flashes red, Service high voltage charging system message, Clicking or buzzing from charger area behind rear seat during charge attempt
Fix: The 3.3 kW OBC (mounted under rear seat area) has capacitor and circuit board failures. Unit must be removed and either rebuilt by specialty EV shops (if you can find one) or replaced with junkyard unit. 3-4 hours labor for R&R. New units were $2,500+ from GM but are NLA; expect salvage units $400-900.
Estimated cost: $800-1,800
BECM (Battery Energy Control Module) Communication Faults
Occasional · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Intermittent service high voltage system warnings, Battery state-of-charge gauge stuck or erratic, No start with 'Shift to Park' message even when in park, Loss of regen braking randomly
Fix: The BECM (brain of the battery pack) develops solder joint cracks or corrupted software. Diagnosis requires GM MDI and EV-specific training. Often fixed by reseating connectors at battery pack, reflashing module (1.5 hours), or replacing BECM if hardware failed (3 hours labor). Used modules need VIN programming at dealer ($150-250).
Estimated cost: $600-1,500
12-Volt Battery Premature Failure
Common · medium severitySymptoms: Car completely dead, will not wake up or unlock, Intermittent accessory electrical glitches, High voltage system won't initialize even with full traction battery, Battery dies after sitting 3-5 days
Fix: The EV charges the 12V battery via DC-DC converter, but the small AGM battery (tucked behind driver-side firewall) gets cycled hard and fails every 2-3 years instead of typical 4-5. Requires specific vented AGM type, not standard flooded. 0.5-1 hour labor but many owners kill the battery by jumping incorrectly or using trickle chargers on EV-specific charging port.
Estimated cost: $200-350
High Voltage Interlock Circuit Faults
Rare · high severitySymptoms: Service high voltage charging system—will not drive or charge, High voltage disconnected message, Clicking from under hood when attempting to start, All warnings appear after water intrusion or accident
Fix: Corrosion in the manual service disconnect (under hood) or interlock loop connectors causes loss of high-voltage permission. Diagnosis critical—never assume it's just a connector without megger-testing the circuit. If actual interlock wiring damaged, requires harness repair (3-5 hours). If service disconnect contacts corroded, cleaning and dielectric grease fix it (1 hour).
Estimated cost: $150-1,200
Drive Unit Output Shaft Seal Leak
Occasional · low severityTypical onset: 90,000-150,000 mi
Symptoms: Gear oil drips from inner CV joint area, Clicking or clunking during tight turns worsens over time, Visible oil on inside of wheel well
Fix: The single-speed transaxle uses 80W-90 gear oil and the output seals weep with age. Requires removing axle shaft, pressing new seal, refilling with correct Dexron HP fluid (NOT standard gear oil despite what looks like it). 2-3 hours per side. Not urgent but low oil level can damage the planetary gears.
Estimated cost: $300-550 per side
Buy one under $6,000 with documented battery health and recent 12V battery replacement; it's a zippy city car but parts availability is dire and battery degradation is a time bomb with no fix.
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.