The 2018 Equinox third-generation platform introduced significant powertrain issues, especially with the 1.5L turbo engine experiencing catastrophic internal failures and the 9-speed automatic transmission showing premature wear. These aren't nuisance problems—they're expensive, engine-replacement-level failures hitting earlier than any modern vehicle should.
1.5L Turbo Catastrophic Engine Failure (Piston/Ring Collapse)
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: Excessive oil consumption (quart every 500-1,000 miles), Blue smoke from exhaust on cold start or acceleration, Metallic knocking from engine bay, Check engine light with misfire codes (P0300-P0304), Complete loss of compression in one or more cylinders
Fix: The 1.5L ecotec suffers premature piston ring failure and carbon buildup leading to scored cylinder walls. Requires complete engine replacement or full rebuild with oversized pistons. GM issued TSB but no recall. 18-25 labor hours for replacement, 30+ for in-chassis rebuild.
Estimated cost: $5,500-9,000
9-Speed Automatic Transmission Shudder and Premature Failure
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Harsh shuddering between 2nd-3rd gear or 15-25 mph acceleration, Transmission slipping or delayed engagement, Clunking during downshifts, Limp mode activation with codes P0700, P0776, P2808, Metal shavings visible in transmission fluid
Fix: The 9T45/9T50 transmission has chronic torque converter clutch issues and internal clutch pack failures. GM released multiple software updates that rarely fix mechanical damage. Requires transmission rebuild or replacement. 10-14 labor hours for R&R.
Estimated cost: $3,800-6,500
Fuel Pump Failure (Recall 20V490)
Occasional · high severitySymptoms: Engine stalling while driving without warning, No-start condition with cranking but no fuel pressure, Rough running or hesitation under load, Check engine light with codes P0087, P0231
Fix: Defective fuel pump modules fail suddenly, leaving drivers stranded. Covered under recall 20V490, but many owners report failures after recall repair. Fuel pump module replacement requires dropping the tank. 2-3 labor hours.
Estimated cost: $600-1,200
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Red transmission fluid pooling under vehicle, Fluid spots on driveway after overnight parking, Low transmission fluid warning light, Transmission overheating messages, Burnt transmission fluid smell
Fix: Steel cooler lines corrode at crimp connections or where they pass through frame mounts. Must replace entire line assembly, not just repair sections. Sometimes requires transmission drop for access. 3-5 labor hours depending on configuration.
Estimated cost: $800-1,500
Driveshaft Center Support Bearing Failure (AWD Models)
Occasional · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Vibration at highway speeds (60+ mph), Clunking noise during acceleration or deceleration, Grinding or rumbling from center of vehicle, Vibration worsens under load or turning
Fix: Two-piece driveshaft center bearing wears prematurely on AWD models. Entire driveshaft assembly must be replaced (bearing not sold separately by GM). Recall 19V594 addressed some units. 2-3 labor hours.
Estimated cost: $700-1,400
Rear Brake Caliper Seizing (Recall 19V139)
Occasional · medium severityTypical onset: 30,000-70,000 mi
Symptoms: Rear brakes dragging (hot wheel after short drive), Reduced braking performance or pulling, Parking brake warning light staying on, Burning smell from rear brakes, Premature rear pad/rotor wear
Fix: Electric parking brake caliper actuators corrode and seize due to poor seal design. Recall 19V139 replaces calipers but many post-recall failures reported. Requires caliper replacement, not just service. 1.5-2 labor hours per side.
Estimated cost: $500-900
1.6L Diesel DEF System and DPF Failures
Common · medium severityTypical onset: 40,000-80,000 mi
Symptoms: Check engine light with P20EE (SCR efficiency), Reduced engine power mode, DEF quality or level warnings despite full tank, DPF regeneration failures, Poor fuel economy and sluggish acceleration
Fix: The 1.6L diesel (rare in US) has chronic DEF injector crystallization and DPF clogging issues. Requires DEF injector replacement and DPF cleaning or replacement. Scanner must command relearn procedures. 4-8 labor hours depending on components.
Estimated cost: $2,000-4,500
Hard pass unless deeply discounted—the 1.5L engine and 9-speed transmission combo has unacceptable failure rates for a vehicle this new, and repair costs often exceed remaining vehicle value.
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.