The 2011 Elantra was Hyundai's fifth-generation sedan that introduced serious engine reliability issues, particularly catastrophic failures tied to manufacturing defects in the 1.8L and 2.0L Nu engines that can grenade bearings and seize without warning.
Catastrophic Engine Bearing Failure (Nu Engine Defect)
Common · high severity
Typical onset: 70,000-120,000 mi
Symptoms: Sudden knocking or ticking from engine bay that worsens rapidly, Metal shavings in oil during changes, Check engine light with rod bearing knock codes, Complete engine seizure while driving (often no warning)
Fix: This is the big one — manufacturing debris left in crankshaft oil passages starves rod and main bearings. Requires complete engine replacement or full rebuild with new short block. Labor alone is 12-16 hours for R&R, plus core work if rebuilding. Hyundai extended warranty to 10yr/100k miles on some VINs but many fall outside coverage.
Estimated cost: $4,500-7,500
Theta Engine Piston Ring Failure and Oil Consumption
Common · high severity
Typical onset: 80,000-140,000 mi
Symptoms: Burning through 1+ quart of oil every 1,000 miles, Blue smoke from exhaust on startup or acceleration, Fouled spark plugs requiring frequent replacement, Cylinder misfire codes (P0301-P0304)
Fix: Piston rings fail to seal properly due to carbon buildup and design flaws. Only real fix is engine teardown and rebuild with new pistons, rings, and honing. Some owners band-aid it by adding oil constantly. Labor is 14-18 hours for proper head gasket and ring job.
Estimated cost: $3,200-5,800
Automatic Transmission Oil Cooler Line Leaks
Common · medium severity
Typical onset: 60,000-110,000 mi
Symptoms: Red transmission fluid pooling under vehicle, Burnt transmission smell, Harsh shifting or slipping between gears, Low fluid level on dipstick check
Fix: Metal cooler lines corrode at fittings or develop pinhole leaks where they route near the subframe. Replacement requires dropping lines and sometimes radiator removal for access. 2-3 hours labor plus fluid flush. Catch it early before transmission starves.
Estimated cost: $350-650
Transmission Mount Failure
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: Excessive clunking when shifting from Park to Drive, Vibration through cabin at idle, Visible engine/trans movement when revving in Park, Harsh engagement into gear
Fix: Rubber mount separates or collapses, allowing powertrain to rock excessively. Front mount is most common culprit. Requires supporting engine/trans with jack, removing old mount hardware. 1.5-2.5 hours labor depending on which mount.
Estimated cost: $200-400
Front Coil Spring Fracture (Recall Campaign)
Occasional · high severity
Symptoms: Popping or clunking noise from front suspension over bumps, Vehicle sagging on one corner, Visible crack or broken coil on inspection, Potential tire damage from broken spring end
Fix: NHTSA recall for front coil springs that can fracture and puncture tire. Hyundai should replace under recall if not already done — check VIN. If out of recall eligibility, replacement requires compressor and strut removal, 2-3 hours per side.
Estimated cost: $0 (recall) or $400-700 per side
ABS Module Failure (Electronic Stability Control)
Occasional · medium severity
Typical onset: 90,000-150,000 mi
Symptoms: ABS and ESC warning lights illuminated, Loss of anti-lock braking function, Traction control disabled message, Hard brake pedal or reduced braking assist
Fix: HECU (Hydraulic Electronic Control Unit) develops internal faults or corrosion on circuit board. Requires bleeding entire brake system after replacement. 2-3 hours labor. Some units covered under extended recall/warranty — verify VIN eligibility first.
Estimated cost: $800-1,400
Fuel Filter Clogging (GDI Engines)
Occasional · low severity
Typical onset: 100,000-140,000 mi
Symptoms: Rough idle and hesitation on acceleration, Stumbling or loss of power under load, Hard starting or extended cranking, Check engine light with fuel trim codes
Fix: In-tank fuel pump filter gets clogged from poor fuel quality or sediment. Access requires dropping fuel tank. Not a common maintenance item but matters in high-mileage examples. 2-3 hours labor including tank R&R.
Estimated cost: $300-550
Owner tips
Check oil level every 500 miles religiously — these engines fail suddenly and oil starvation is the killer
Verify if VIN is covered under Hyundai's lifetime engine warranty settlement (class action) before purchase
Run full Carfax for engine replacement history — a replaced engine under warranty is actually a plus
Inspect for transmission fluid leaks during every oil change, especially at cooler lines near radiator
If you hear ANY knocking from engine, park it immediately and have it towed — driving makes catastrophic failure worse
Hard pass unless it already has a documented replacement engine under warranty and you can verify clean history — the Nu engine failures are expensive gambles that often exceed 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.
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SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE · 23V651000
2023-09-22
Hyundai Motor America (Hyundai) is recalling certain 2011-2015 Elantra, Genesis Coupe, Sonata Hybrid, 2012-2015 Accent, Azera, Veloster, 2013-2015 Elantra Coupe, Santa Fe, 2014-2015 Equus, 2010-2012 Veracruz, 2010-2013 Tucson, 2015 Tucson Fuel Cell, and 2013 Santa Fe Sport vehicles. The Anti-Lock Brake System (ABS) module may leak brake fluid internally and cause an electrical short, which can result in an engine compartment fire while parked or driving.
Consequence: An engine compartment fire while parked or driving can increase the risk of injury.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will replace the ABS fuse, free of charge. Owner notification letters were mailed April 10, 2024 through October 11, 2024. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 251.
EQUIPMENT:ELECTRICAL · 20V393000
2020-07-02 · PE19003
Hyundai Motor America (Hyundai) is recalling certain 2011-2012 Hyundai Elantra and Sonata Hybrid, 2012 Accent and Veloster vehicles. The 12V accessory socket outlet may have been over-tightened during installation, possibly disabling the thermal fuse and allowing the outlet to overheat with prolonged use, such as by using the Tire Mobility Kit air compressor to inflate a tire.
Consequence: An overheated accessory outlet increases the risk of fire.
Remedy: Hyundai will notify owners, and dealers will replace the Tire Mobility Kit accessory outlet plug with a direct-to-battery connection wire harness kit, free of charge. The recall began September 28, 2020. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 193.
ELECTRONIC STABILITY CONTROL (ESC) · 15V871000
2015-12-23
Hyundai Motor America (Hyundai) is recalling certain model year 2011-2012 Elantra vehicles manufactured October 29, 2010, to October 25, 2011. Due to an electronic stability control (ESC) sensor malfunction, the brakes for one or more wheels may be applied unexpectedly and the engine power may be reduced. These symptoms will be accompanied by illumination of the ESC indicator lamp in the instrument cluster.
Consequence: If the one or more of the brakes are inappropriately applied, control of the vehicle may be lost, increasing the risk of a crash.
Remedy: Hyundai will notify owners, and dealers will verify the proper operation of the ESC sensors, and update the ESC system's calibration, free of charge. The recall began June 6, 2016. Owners may contact Hyundai customer service at 1-800-633-5151. Hyundai's number for this recall is 137.
SUSPENSION:FRONT:SPRINGS:COIL SPRINGS · 15V629000
2015-10-07
Hyundai Motor America (Hyundai) is recalling certain model year 2011 Elantra vehicles manufactured November 12, 2010, to March 31, 2011, and Sonata vehicles manufactured December 11, 2009, to February 28, 2010, originally sold in, or currently registered in, Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin and the District of Columbia. Road salt may corrode the front coil springs, possibly resulting in the coil springs fracturing.
Consequence: If a front coil spring fractures, it may contact the tire, possibly puncturing it, increasing the risk of a crash.
Remedy: Hyundai will notify owners, and dealers will replace the front coil springs, free of charge. Interim notifications were mailed on November 17, 2015. The recall began on January 6, 2016. Owners may contact Hyundai customer service at 1-855-671-3059. Hyundai's number for this recall is 133. Note: Vehicles that were previously registered in salt belt states but are currently registered elsewhere are eligible to be inspected and repaired.
AIR BAGS:SIDE/WINDOW · 13V115000
2013-04-01 · EA12008
Hyundai Motor Company is recalling certain model year 2011-2013 Elantra vehicles manufactured from November 12, 2010, through March 5, 2013. A support bracket attached to the headliner may become displaced during a side curtain airbag deployment.
Consequence: If the headliner support bracket makes contact with an occupant during a crash, it may cause a laceration injury.
Remedy: Hyundai will notify owners, and dealers will apply adhesive strips to the headliner, free of charge. The safety recall began during April 2013. Owners may contact Hyundai at 1-800-633-5151. Hyundai's recall campaign number is 109.
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