Hyundai · Known Issues
2020 Hyundai Elantra Problems: 10 Known Issues
2020 model year · 456+ owner reports · Updated September 2026
2020 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2020 model year · 456+ owner reports · Updated September 2026
2020 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 456+ owner reports, the 2020 Hyundai Elantra has 10 documented known issues, with 3 rated critical. The most serious are Theft Vulnerability — Missing Engine Immobilizer ('Kia Boyz' / TikTok Challenge), Improperly Heat-Treated Piston Oil Rings Causing Cylinder Bore Scuffing and Engine Seizure (Recall 203 / 21V301) ($0-$6,500 repair) and P0016 — Crank/Cam Correlation (Bank 1 Sensor A) from Clogged OCV or Stretched Timing Chain ($150-$1,300 repair). The most commonly reported issue is IVT/CVT Transmission Failure and Power Loss with 456 owner reports. Across all issues with published estimates, repair costs range from $50 to $6,500. DIY maintenance guides at au7o.io.
ENGINE
Hyundai Motor America (Hyundai) is recalling certain 2019-2020 Elantra, 2019-2021 Kona and Veloster vehicles equipped with 2.0L Nu MPI engines. The piston oil rings may not have been properly heat-treated, which could result in engine damage.
WHEELS:LUGS/NUTS/BOLTS/STUDS
Hyundai Motor America (Hyundai) is recalling certain 2019 Ioniq Hybrid and 2020 Elantra vehicles. The right-side rear wheel lug nuts may have been insufficiently tightened, allowing the wheel to detach from the vehicle.
SUSPENSION:FRONT:CONTROL ARM:LOWER BALL JOINT
Hyundai Motor America (Hyundai) is recalling certain 2020 Elantra vehicles. The lower control arm ball joint fasteners may have been insufficiently tightened allowing the ball joint to detach from the lower control arm.
AIR BAGS:FRONTAL
Hyundai Motor America (Hyundai) is recalling certain 2022 Elantra N and 2022-2023 Elantra vehicles. The emblem on the cover of the driver's front air bag may not have been welded properly, which can result in the emblem detaching upon deployment.
POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:PUMP
Hyundai Motor America (Hyundai) is recalling certain 2023-2024 Palisade Tucson, 2023 Sonata, Elantra, and Kona vehicles. The electronic controller for the Idle Stop & Go oil pump assembly may contain damaged electrical components that can cause the pump controller to overheat.
+ 7 more recalls. Check all on NHTSA.gov
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According to Au7o's analysis of 456+ owner reports, the 2020 Hyundai Elantra has 10 documented issues. The most frequently reported are: Theft Vulnerability — Missing Engine Immobilizer ('Kia Boyz' / TikTok Challenge), Improperly Heat-Treated Piston Oil Rings Causing Cylinder Bore Scuffing and Engine Seizure (Recall 203 / 21V301), P0016 — Crank/Cam Correlation (Bank 1 Sensor A) from Clogged OCV or Stretched Timing Chain. Of these, 3 are rated critical and should be addressed promptly.
The 2020 Hyundai Elantra has 10 known issues documented across 456+ owner reports. 3 issues are rated critical: Theft Vulnerability — Missing Engine Immobilizer ('Kia Boyz' / TikTok Challenge) and Improperly Heat-Treated Piston Oil Rings Causing Cylinder Bore Scuffing and Engine Seizure (Recall 203 / 21V301) and P0016 — Crank/Cam Correlation (Bank 1 Sensor A) from Clogged OCV or Stretched Timing Chain. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Hyundai Elantra issues range from $0 to $6,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Hyundai identifies certain 2011-2022 Elantra vehicles with traditional turn-key ignitions and without engine immobilizers as affected by theft methods that bypass the vehicles' security features. Vehicles with push-button start or an immobilizer indicator are not in this software… Severity: high.
Certain 2019-2020 Elantra sedans built with the 2.0L Nu MPI (Atkinson-cycle) engine were assembled with piston oil rings whose nitride heat treatment was inconsistent, leaving the rings excessively hard. The hardened outer periphery of the oil ring chips, and the chipped material… Repairs typically run $0-$6,500. Severity: high.
P0016 means the intake camshaft position no longer correlates with the crankshaft position within the allowed window. On the Elantra's CVVT engines the two dominant causes are (1) a clogged/stuck Oil Control Valve (OCV/CVVT solenoid) — its internal screen loads up with sludge fro… Repairs typically run $150-$1,300. Severity: high.
The Smart Stream IVT (Intelligent Variable Transmission) in newer Elantras has experienced early failures, sometimes before reaching 20,000 miles. Issues include sudden power loss, check engine lights, and RPM fluctuations. Hyundai issued TSB 20-01-047H addressing transmission co… Repairs typically run $0-$5,500. Severity: medium.
P0011 sets when the intake camshaft is more advanced than the PCM commanded (or the CVVT system won't respond correctly). On the Elantra this is most often a stuck/clogged intake Oil Control Valve (CVVT solenoid): the valve's fine internal screen plugs with oil varnish/sludge, so… Repairs typically run $120-$400. Severity: medium.
Elantras run in road-salt regions suffer a consistent rear brake problem: the rear caliper piston and the caliper slide pins corrode and stop retracting, so the pads stay in light contact with the rotor. The tell-tale is rear pads wearing out faster than fronts - the reverse of t… Repairs typically run $250-$900. Severity: medium.
The Elantra Sport's 1.6L Gamma T-GDI is a direct-injection-only engine: no fuel ever washes across the back of the intake valves, so oil vapour drawn in through the PCV system bakes onto the valve stems and seats. Owners on the Elantra Sport community report visible deposits by r… Repairs typically run $450-$1,200. Severity: medium.
Elantras fitted with a sunroof route water that gets past the glass seal into four corner drains and down tubes inside the A-pillars and rear pillars. On cars parked under trees the corner drains silt up with pollen, leaf debris and dirt, and the tubes themselves can pull off the… Repairs typically run $0-$600. Severity: medium.
On the Elantra's inline-4 (Beta II 2.0L in 2007-2010, Nu 2.0L in 2011+), P0171 means fuel trims have gone too positive because unmetered air is entering the engine. The classic Elantra trigger is a vacuum leak — most often a hardened/cracked PCV hose or a leaking intake-manifold… Repairs typically run $50-$450. Severity: medium.
P0420 on the Elantra means the downstream (post-cat) oxygen sensor sees the catalytic converter no longer scrubbing efficiently. On the 2017-2020 Nu 2.0L engine this frequently is not just an aged cat — it is a symptom of the well-documented Nu 2.0L piston-ring/oil-consumption de… Repairs typically run $300-$1,800. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.