The 2017 Elantra is a mixed bag—the naturally-aspirated 2.0L is relatively trouble-free, but the dual-clutch transmission models and the 1.6L turbo have earned a reputation for catastrophic engine failures and transmission headaches that can total an otherwise decent commuter car.
Catastrophic Engine Failure (1.6L Turbo)
Occasional · high severityTypical onset: 60,000-100,000 mi
Symptoms: Metallic knocking or ticking from engine bay, especially on cold starts, Metal shavings in oil during changes, Sudden loss of power, check engine light, oil pressure warning, Seized engine with no warning after oil starvation
Fix: Theta II engine family rod bearing defect leads to spun bearings, scored crankshaft, and grenaded motors. TSB exists but most failures happen outside powertrain warranty. Typical fix is replacement short block or used engine swap (8-14 labor hours). Hyundai extended warranty to 10yr/100k for some VINs but not all—check recall lookup first.
Estimated cost: $5,500-8,500
Dual-Clutch Transmission Judder and Failure (DCT models)
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Shuddering or jerking during low-speed acceleration or in stop-and-go traffic, Hesitation when pulling away from a stop, Transmission slipping between gears or refusing to engage, Burning smell from transmission area
Fix: The 7-speed dual-clutch has a pattern of clutch pack wear and mechatronic unit failures. Hyundai issued multiple TSBs and extended DCT warranty to 10yr/100k, but adaptive learn procedures rarely hold. Clutch replacement runs 6-9 hours; mechatronic unit another 4-6. Many shops won't touch DCT internals—expect dealer pricing or used transmission swap.
Estimated cost: $3,200-5,800
Brake Booster Recall and Power Brake Loss
Occasional · high severitySymptoms: Hard brake pedal requiring excessive force to stop, Brake warning light illuminated, Hissing sound from brake booster area, Extended stopping distances
Fix: NHTSA recall 20V-584 covers brake vacuum pump failure on certain VINs. If your VIN isn't covered but symptoms match, replacement brake booster and vacuum pump run 3-4 labor hours. Check recall status before paying out of pocket—Hyundai has been expanding coverage on these. This is a safety-critical failure; don't drive if pedal goes hard.
Estimated cost: $800-1,400
Electric Power Steering Motor Failure
Occasional · high severityTypical onset: 70,000-110,000 mi
Symptoms: Sudden loss of power steering assist, especially at highway speeds, EPS warning light on dash, Steering feels heavy or requires excessive effort, Clicking or whining noise from steering column
Fix: NHTSA recall 20V-336 addresses some EPS failures, but many units fail outside recall scope. Steering motor and control module replacement requires column removal (3-5 hours). Hyundai extended EPS warranty to 15yr/unlimited miles on some VINs—verify before repair. Absolute safety issue when it fails at speed; can cause loss of vehicle control.
Estimated cost: $900-1,600
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Red transmission fluid puddles under vehicle, Transmission overheating warning on long drives or in traffic, Burnt transmission fluid smell, Low fluid level on dipstick (if equipped)
Fix: Cooler line fittings at radiator corrode or crack, especially in salt-belt states. Lines run along subframe and are exposed to road debris. Replacement involves new lines, fittings, and fresh fluid/filter service (2-3 hours). Catch it early before running the trans dry—low fluid kills the dual-clutch fast.
Estimated cost: $400-750
Premature Engine Mount Failure (All Engines)
Common · low severityTypical onset: 60,000-100,000 mi
Symptoms: Excessive vibration at idle, especially with A/C on, Clunking when shifting from Park to Drive or Reverse, Engine rocking visible under hood during acceleration, Increased cabin noise and harshness
Fix: Torque mount and passenger-side mount deteriorate faster than expected. Fluid-filled mounts leak and collapse. Replacing all three mounts (upper torque, left, right) takes 2-3 hours. Use OEM or quality aftermarket (Westar, DEA)—cheap mounts fail in under a year. Not urgent but improves drivability significantly.
Estimated cost: $350-650
Buy only if it's a 2.0L with conventional auto and full service records; avoid the 1.6L turbo and DCT like the plague unless you enjoy surprise $6,000 repair bills.
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.