The 2013 Volt is a complex plug-in hybrid with a solid electric drivetrain but notorious for range-extender engine failures and unique coolant system issues. The electric components are generally durable, but when the 1.4L gas engine needs work, costs escalate quickly due to labor-intensive access.
Range Extender Engine Bearing and Piston Failure
Occasional · high severityTypical onset: 70,000-120,000 mi
Symptoms: Knocking or ticking from engine during range-extender operation, Metal shavings in oil, Check engine light with low oil pressure codes, Sudden loss of range-extender power
Fix: The 1.4L engine suffers from oil consumption and bearing wear, often requiring complete engine rebuild or short block replacement. Access requires partial disassembly of the hybrid system. Expect 18-25 hours labor for short block swap, 22-30 hours for full rebuild with pistons and bearings.
Estimated cost: $4,500-8,500
Transmission Oil Cooler and Coolant Circuit Contamination
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Milky or contaminated coolant in expansion tank, Transmission slipping or rough shifts, Coolant in transmission fluid, Overheating warnings on dash
Fix: The transmission oil cooler fails internally, mixing coolant and ATF. This requires cooler replacement, fluid flushes of both systems, and often transmission repair if contamination went unnoticed. Complete job runs 8-12 hours including flushes and system bleeding.
Estimated cost: $2,200-4,000
Battery Thermal Management System (BTMS) Coolant Leaks
Occasional · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Sweet coolant smell in cabin, Reduced electric range, Battery conditioning messages on display, Visible coolant pooling under center of vehicle
Fix: The Volt uses a separate coolant loop for battery thermal management with unique Dexcool formulation. Hoses, fittings, and the reservoir develop leaks. Requires lifting the vehicle and accessing components under the battery pack. 4-7 hours depending on leak location.
Estimated cost: $800-1,800
Transmission Mount (Rear Motor Mount) Failure
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking when accelerating or decelerating, Vibration felt through floorboard, Excessive drivetrain movement visible when rocking vehicle, Harsh transitions between EV and gas modes
Fix: The rear transmission mount bears significant torque load from instant electric motor torque and fails prematurely. Replacement requires supporting the drivetrain from below. 2.5-4 hours labor.
Estimated cost: $450-750
Shifter Assembly Electronic Failure
Occasional · medium severityTypical onset: null
Symptoms: Shifter won't move out of Park, Shift to Drive message appears but car won't move, Shifter position not matching gear display, Intermittent shift lock issues
Fix: The electronic shifter module experiences internal failures requiring complete assembly replacement. Programming required after installation. 2-3 hours labor.
Estimated cost: $900-1,400
High Voltage Battery Capacity Degradation
Common · low severityTypical onset: 100,000+ mi
Symptoms: Electric range drops below 28-30 miles on full charge, More frequent range-extender engagement, Battery capacity test shows below 65% of original
Fix: The 16.5 kWh battery pack degrades gradually. GM offered 8yr/100k mile warranty coverage for Gen 1 Volts. Replacement involves complete high-voltage system de-energizing and pack removal from underneath. 12-16 hours labor. Many owners live with reduced range rather than replace.
Estimated cost: $3,500-6,000
Becm (Body Electrical Control Module) Communication Failures
Occasional · medium severityTypical onset: null
Symptoms: Random electrical glitches, Infotainment system freezing or rebooting, Charging issues, Multiple warning lights with no other symptoms, Parasitic battery drain
Fix: Communication bus errors between control modules cause bizarre electrical issues. Often requires BECM replacement and reprogramming. Diagnosis can be time-consuming. 3-5 hours including programming.
Estimated cost: $1,200-2,200
Buy only if under 70k miles with documented range-extender oil changes and you can stomach potential $5k+ engine bills—otherwise the EV drivetrain is solid but the gas engine is a ticking time bomb.
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.