AI Damage2018 Hyundai Elantra: common problems
Owners of the 2018 Hyundai Elantra filed 284 complaints with NHTSA, most often about engine and electrical system. The maker issued 102 service bulletins for this year. We found 1 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 284
- involving a crash
- 12
- Technical service bulletins (TSB)
- 102
- YouTube repair videos
- 1
What fails most often
- 1 Engine 50% of all complaints
- 2 Electrical system 15% of all complaints
- 3 Powertrain 8% of all complaints
- 4 Fuel/propulsion system 7% of all complaints
- 5 Steering 6% of all complaints
- 6 Exterior lighting 6% of all complaints
- 7 Service brakes 5% of all complaints
- 8 Structure 5% of all complaints
- Engine: 142 complaints (50% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 2.
- Electrical system: 43 complaints (15% of all), 2 of them with a crash reported by the owner; manufacturer bulletins for this component: 45.
- Powertrain: 24 complaints (8% of all); manufacturer bulletins for this component: 9.
- Fuel/propulsion system: 19 complaints (7% of all), 1 of them with a crash reported by the owner.
- Steering: 16 complaints (6% of all); manufacturer bulletins for this component: 12.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 1.4 L · petrol · turbo · 4 cyl
- 1.6 L · petrol · turbo · 4 cyl
- 2 L · petrol · 4 cylnamed in 4 complaints
- automatic, 6-speed
- dual-clutch (DCT), 7-speednamed in 3 complaints
- manual, 6-speednamed in 2 complaints
Drive: FWD
Symptoms owners describe
How many of the 284 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 142 | 3 | 2 |
| Electrical system | 43 | 2 | 45 |
| Powertrain | 24 | 0 | 9 |
| Fuel/propulsion system | 19 | 1 | 0 |
| Steering | 16 | 0 | 12 |
| Exterior lighting | 16 | 0 | 3 |
| Service brakes | 15 | 1 | 4 |
| Structure | 15 | 0 | 3 |
| Vehicle speed control | 13 | 0 | 1 |
| Air bags | 12 | 6 | 2 |
| Wheels | 10 | 0 | 2 |
| Suspension | 6 | 0 | 1 |
| Engine and cooling | 4 | 0 | 9 |
| Lane departure | 4 | 0 | 2 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The check engine light extinguished momentarily but returned, logging P0303 and a new P0301 Replaced all 4 fuel injectors. CEL extinguished momentarily and then returned, logging P0303. Replaced the entire engine electrical harness.
The front and rear ends of my car were completely crushed to the point where the drivers door will not open more than about a foot. At no point did my airbags deploy. My car is serviced regularly and no warning lights were on. I was not injured but am extremely lucky that this was the case. A police report was filed.
No warning lights were illuminated. The air bags failed to deploy. The vehicle was towed to a tow yard. No injuries were sustained. No medical attention was required. A police report was filed. The vehicle was not diagnosed or repaired. The dealer nor the manufacturer was notified of the failure.
At this time, the air bags did not deploy. Once the car was evaluated by the insurance company the car was considered totaled. The insurance company took the car to a salvage. This could have taken my life.
Got into an accident but there was immediately an engine fire
My seat belt didn't lock and I felt as if I wasn't slowing down. The same thing happened to me while driving at a slower speed of 30 mph. I broke again hard and my car wouldn't stop.
engine mounts have been replaced already twice and they keep going bad last time was over a year ago and now it's bad again making noises vibrate and this replacement was done by the dealership with parts from Hyundai apparently under warranty and now warranty is almost done worries me that in a year without warranty…
As this is progressing, structural pieces may begin to rust, but this also presents a critical visibility issue. During one drive on 6/8/2026, the hood paint began flaking away significantly at highway speeds, which could have jeopardized my or following drivers visibility in conditions that were already rainy.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 220 of 2,102 model years in the NHTSA data (top 10% most complained about).
On average one model year of the Elantra has 124 complaints (11 years in the data). This year has 284, above average.
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil…
Some vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this…
- Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil…
Certain vehicles equipped with internal combustion engines may exhibit higher-than-expected engine oil consumption. This bulletin provides the inspection and repair procedures for vehicles exhibiting this condition…
- Certain vehicles may exhibit excessive paint peeling or bubbling of the primer/paint film on the exterior…
Certain vehicles may exhibit excessive paint peeling or bubbling of the primer/paint film on the exterior metal body panels: hood, fender(s), roof, door(s), quarter panel(s), and tailgate/trunk. This warranty extension…
- Certain Hyundai vehicles with exterior white paint may exhibit peeling or bubbling on metal body panels
hood, fender(s), roof, door(s), quarter panel(s), and tailgate/trunk. The paint warranty coverage for affected vehicles has been extended to 10 years/unlimited miles from the date of original retail delivery or date of…
- Some Hyundai vehicles with exterior white paint may exhibit peeling or bubbling on metal body panels
hood, fender(s), roof, door(s), quarter panel(s), and tailgate/trunk. The paint warranty coverage for affected vehicles has been extended to 10 years/unlimited miles from the date of original retail delivery or date of…
- The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and…
The National Highway Traffic Safety Administration (NHTSA) has identified the presence of substandard and dangerous driver’s-side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety System Co…
- The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding…
The National Highway Traffic Safety Administration (NHTSA) has issued an urgent safety advisory regarding dangerous, counterfeit driver‑side airbag inflators manufactured by Jilin Province Detiannuo Automobile Safety…
- Upon customer's request ONLY, the Technical Service Bulletin (TSB) 25-01-089H provides the service…
Upon customer's request ONLY, the Technical Service Bulletin (TSB) 25-01-089H provides the service procedure for installation of a key cylinder reinforcement protector assembly and two anti-theft decals on the front…
- In addition to the Anti-Theft software provided under Service Campaign 993 (TSB 24-01-009H-1), a zinc…
In addition to the Anti-Theft software provided under Service Campaign 993 (TSB 24-01-009H-1), a zinc reinforced ignition cylinder protector hardware upgrade is being made available to customers upon request. This…
- This bulletin provides the service procedure for installation of a key cylinder reinforcement protector…
This bulletin provides the service procedure for installation of a key cylinder reinforcement protector assembly and two anti-theft decals on the front windows.
- In response to this trend, we engineered a software upgrade that addresses the social media theft method…
In response to this trend, we engineered a software upgrade that addresses the social media theft method and made it available to owners of eligible models free of charge at authorized Hyundai dealers since early 2023…
- This bulletin provides information regarding condensation related to the accumulated moisture in the…
This bulletin provides information regarding condensation related to the accumulated moisture in the headlamp, rear combination lamp, daytime running lamp (DRL), or fog lamp. This TSB illustrates the various causes of…
NHTSA lists 102 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other years of this model
Questions and answers
What are the most common problems with the 2018 Hyundai Elantra?
Owner complaints to NHTSA most often mention: engine, electrical system, powertrain. Total complaints: 284. The most frequent symptoms in complaint texts: warning lights, check engine (28%), stalls while driving (16%), knocking, grinding or other noise (12%).
How many service bulletins (TSB) were issued for the 2018 Hyundai Elantra?
NHTSA lists 102 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 Hyundai Elantra from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.