2018 Hyundai ioniq
Recalls, most-reported problems, crash-test ratings, fuel economy and what a 2018 Hyundai ioniq is worth — from official NHTSA and EPA data. 978 on record.
2018 Hyundai ioniq at a glance
Included: that car's specs and build sheet, model-year recall campaigns and a fair price.
2018 Hyundai ioniq recalls 3
Hyundai Motor America (Hyundai) is recalling certain 2017-2018 Ioniq HEV and Ionic PHV vehicles previously recalled under recall number 18V-704. The Power Relay Assembly (PRA) located underneath the rear seat may overheat.
Fix: Dealers will inspect and replace the main relay or PRA, as necessary, free of charge. Owner notification letters were mailed August 23, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 232. This recall replaces NHTSA recall number 18V-704. Veh…
Hyundai Motor America (Hyundai) is recalling certain 2017-2019 Ioniq electric vehicles. An unstable electrical ground may cause the vehicle to enter a fail-safe mode with reduced acceleration and power. In certain conditions while in fail-safe mode, the vehicle may accelerate after the gas pedal is released.
Fix: Dealers will update the EPCU (Electric Power Control Unit) software and repair the ground wiring, free of charge. Owner notification letters were mailed February 9, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 215.
Hyundai Motor America (Hyundai) is recalling certain 2017-2018 Hyundai Ioniq Hybrid and 2018 Ioniq Plug-In Hybrid vehicles. The Main Relay within the Power Relay Assembly (PRA) may have inadequate connections between its contacts, causing increased electrical resistance.
Fix: Hyundai will notify owners, and dealers will inspect the Power Relay Assembly (PRA) for damage. If no damage is found, the main relay will be replaced. If damage is found, the PRA will be replaced. These repairs will be performed free of charge. The recall began February 28, 2019. Owners may contac…
Source: U.S. NHTSA, checked 4 Nov 2026. A campaign covers the model year; to see whether a particular car still needs the repair, check its VIN on NHTSA.gov or ask a franchised dealer.
2018 Hyundai ioniq MPG & running costs
Source: U.S. EPA / DOE fueleconomy.gov.
Estimated 5-year cost to own
A rough guide to what running a 2018 Hyundai ioniq costs over five years and 75,000 miles.
How this is estimated: fuel is the U.S. EPA annual cost at 15,000 miles a year. There aren't enough comparable listings to estimate depreciation for this model, so it is left out. Not included: insurance, maintenance, repairs, taxes, registration and finance costs. Treat it as a comparison guide, not a quote.
Dimensions & weight
Manufacturer-reported figures for the 2018 Hyundai ioniq. Source: Transport Canada vehicle specifications via NHTSA.
Investigations & service bulletins
NHTSA defect investigations 1
Pedestrian alert sounds Closed
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that…
NHTSA #DP22005 · Electrical System · opened Jan 2023 · closed Aug 2023An investigation means NHTSA is examining a possible defect — it is not a recall, and many close without one.
Manufacturer service bulletins 68
Technical notes the manufacturer sent to dealers about known issues and fixes. Useful to mention to a mechanic — they are not recalls and repairs may not be covered. Showing the 10 most recent of 68.
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., Ltd. (DTN). These inflators were not suppl…
Bulletin DTN DL · Air Bags · Apr 2026The 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 System Co., Ltd. (DTN), that have been iden…
Bulletin DTN DCS · Air Bags · Apr 2026This 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 condensation inside the lamp assembly. Lam…
Bulletin 25-BD-012H TSB · Exterior Lighting · Nov 2025Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connectio…
Bulletin 25-01-024H-1 TSB · Electrical System · May 2025Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon's communication network. If you are experiencing issues with remote commands, or other…
Bulletin 25-01-024H EM · Electrical System · Apr 2025Some vehicles may exhibit a loss of connectivity or interruptions in the middle of using Bluelink Service functions. This may be due to an irregular disconnection on Verizon’s communication network. Follow the procedure in this TSB to reestablish the connectio…
Bulletin 25-01-024H TSB · Electrical System · Mar 2025This bulletin contains information about the proper removal of the windshield wiper blade protective cover on all models. If the protective cover is not removed correctly, there is a possibility of the rubber insert and rail spring becoming partially separated…
Bulletin 24-BD-001H · Visibility, Visibility/wiper · Feb 2024This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
Bulletin 23-EM-005H · Engine And Engine Cooling · Oct 2023This Service Information bulletin provides information on how to update the Apple Carplay software from Hyundaiâs Navigation Updates page. The current version of Google Maps has 10 times the data transmission compared to the previous version. As a countermea…
Bulletin 23-BE-007H · Electrical System, Equipment · Jul 2023Hyundai applies a Paint Protection Film (PPF) on new vehicles before delivery to dealerships. It provides a barrier between the paint and contaminants, such as rail dust, acid rain, and industrial fallout. In rare cases, the paint can become clouded under the…
Bulletin 23-BD-007H · Structure · Apr 2023Source: NHTSA Office of Defects Investigation, listed for the IONIQ HYBRID FWD. Model-year data, not specific to one car.
Canadian recalls 3
Transport Canada recall campaigns for the 2018 Hyundai ioniq. Relevant if the car was first sold in, or imported from, Canada.
Powertrain
Issue: On certain Ioniq EV models, the vehicle could accelerate after the accelerator pedal is released. Note: This problem can only happen under certain conditions after the vehicle enters "fail-safe" mode. Safety Risk: A vehicle that continues to accelerate could create the risk of a crash. Corrective Actions: Hyundai will notify owners by mail and instruct you bring your veh…
Transport Canada #2021735 · Dec 2021Electrical
On certain Hybrid and Plug-In Hybrid (PHEV) vehicles, the main relay contacts in the Power Relay Assembly located underneath the rear seat may have an inadequate connection. This could increase electrical resistance and generate heat, increasing the risk of fire causing injury and/or damage to property. Correction: Dealers will inspect the Power Relay Assembly for signs of ther…
Transport Canada #2018562 · Oct 2018Label
Certain Plug-In Hybrid (PHEV) vehicles may not comply with Canadian Motor Vehicle Safety Regulations. The compliance label may bear incorrect front and rear Gross Axle Weight Rating (GAWR) values. If the vehicle were to be loaded in excess of either GAWR value, it could lead to premature tire failure and/or vehicle overloading, which could increase the risk of a crash causing i…
Transport Canada #2018032 · Jan 2018Source: Transport Canada Motor Vehicle Safety Recalls Database.
About the Hyundai ioniq
The Hyundai Ioniq is a compact car which was manufactured and marketed by Hyundai from 2016 to 2022. A five-door liftback, it is marketed as the first Hyundai automobile to be offered without a standard internal combustion engine, but rather sold in hybrid, plug-in hybrid, and all-electric variants.
From Wikipedia, licensed CC BY-SA 4.0. Describes the model line in general, not this model year specifically.
2018 Hyundai ioniq trims & engines on record
2018 Hyundai ioniq vehicles on record
2018 Hyundai ioniq Limited w/Ultimate (HEV)KMHC05LC4JU060188
2018 Hyundai ioniqKMHC851HFJU029324
2018 Hyundai ioniqKMHC851HFKU033116
2018 Hyundai ioniqKMHC851HFJU026147
2018 Hyundai ioniqKMHC851HFJU024640
2018 Hyundai ioniqKMHC851HFJU029436
2018 Hyundai ioniqKMHC851HFKU037617
2018 Hyundai ioniqKMHC851HFHU028163
2018 Hyundai ioniqKMHC851HFJU027394
2018 Hyundai ioniqKMHC65LC7KU125129
2018 Hyundai ioniqKMHC751HFKU037441
2018 Hyundai ioniqKMHC851HFKU043465
2018 Hyundai ioniqKMHC05LC2KU141708
2018 Hyundai ioniqKMHC851HFKU043470
2018 Hyundai ioniqKMHC751HFJU029534
2018 Hyundai ioniqKMHC65LC3JU092029
2018 Hyundai ioniqKMHC751HFKU033569
2018 Hyundai ioniqKMHC851HFHU023763
2018 Hyundai ioniqKMHC851HFKU034339
2018 Hyundai ioniqKMHC75LC4KU118555
2018 Hyundai ioniqKMHC851HFKU038814
2018 Hyundai ioniqKMHC751HFKU033492
2018 Hyundai ioniqKMHC851HFKU033991
2018 Hyundai ioniqKMHC75LD3KU115140