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#BS-2018-HYUSON-240B2018 Hyundai SonataProblems, Recalls & Reliability
Based on reports from 555 owners and 1 recall for this exact model.
Data updated ·NHTSA complaints through October 19, 2026
Preliminary Verdict
Red Flag
Based on 555 complaints, 26 crashes, 19 fires, and 1 recalls. Complaint rate is 4.0x the class average.
Top reported problems
check engine light on
12 complaints • Severity 8.3/10
oil consumption
7 complaints • Severity 8.6/10
hard downshifts
6 complaints • Severity 7.7/10
defective engine
4 complaints • Severity 9.5/10
not starting in cold weather
3 complaints • Severity 7.3/10
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Mechanic Inspection Checklist
223 owners reported engine issues — failures commonly reported around 20K miles.
Failure Timeline by Mileage
Peak failure range: 0–30K miles (119 reports) • Median: 20K miles
30,000-Mile Cost Projection
Best Case
Most Likely
Worst Case
Top cost driver: Engine (223 reports).
Also in your report
Owner Intelligence
AI-synthesized themes from real complaints
Buyer Lot Checklist
Questions, test drive checks, walk-away triggers
Negotiation Talking Points
Data-backed dollar deductions
Buy / Skip Verdict
Final recommendation with conditions
Where the complaints fall
2018 Hyundai Sonata: Known Issues & Problem Areas
Engine Issues
Engine complaints account for 40% of all reports filed for the 2018 Hyundai Sonata, with 223 owners filing complaints with NHTSA. The median mileage at time of complaint is 20,000 miles, suggesting issues tend to surface around the 20K-mile mark.
Electrical Issues
Electrical complaints account for 10% of all reports filed for the 2018 Hyundai Sonata, with 56 owners filing complaints with NHTSA. Owners should pay attention to electrical-related symptoms during test drives and pre-purchase inspections.
Drivetrain Issues
Drivetrain complaints account for 7% of all reports filed for the 2018 Hyundai Sonata, with 40 owners filing complaints with NHTSA. Owners should pay attention to drivetrain-related symptoms during test drives and pre-purchase inspections.
Fuel System Issues
Fuel System complaints account for 6% of all reports filed for the 2018 Hyundai Sonata, with 33 owners filing complaints with NHTSA. Owners should pay attention to fuel system-related symptoms during test drives and pre-purchase inspections.
Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.
Complaint trend by year
Complaints filed with NHTSA by year for the 2018 Hyundai Sonata. Recent trend: decreasing.
Don't negotiate blind — know what this car costs to own
Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict
Recall History (1 recall)
LATCHES/LOCKS/LINKAGES:TRUNK LID:LATCH
Hyundai Motor America (Hyundai) is recalling certain 2017-2018 Sonata, 2016-2018 Sonata Hybrid, 2018-2020 Accent, and 2016-2017 Azera vehicles. The trunk latch may become damaged, preventing the opening of the trunk from the inside. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 401, "Internal Trunk Release."
Recall severity analysis & seller scripts
The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.
2018 Hyundai Sonata NHTSA Safety Ratings
Overall
★★★★★5 of 5 stars
Frontal crash
★★★★★5 of 5 stars
Side crash
★★★★★5 of 5 stars
Rollover
★★★★★4 of 5 stars
From NHTSA's New Car Assessment Program (5-Star Safety Ratings). Where NHTSA tested more than one version of this vehicle, the lowest rating is shown.
NHTSA Defect Investigations (2)
All closed. Investigations are how NHTSA decides whether a defect needs a recall.
Loss of Motive Power
ENGINE
Electrical overstress
AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE
The worst model year for the Hyundai Sonata is the 2011 — worth knowing if you're cross-shopping years. The biggest problem area is engine.
2018 Hyundai Sonata vs. Class Average (Large Cars)
This vehicle
555
Class avg
138
4.0x the class average — significantly more complaints than typical large cars vehicles.
Complaint counts correlate with sales volume — popular vehicles naturally generate more reports. The full report normalizes for this.
About this data
NHTSA Complaints
Federal database of owner-filed safety complaints. 555 records for this vehicle.
NHTSA Recalls
Manufacturer-issued safety recalls. 1 recall found for this vehicle.
Repair Cost Data
Real-world repair costs from owner reports and independent databases.
Last updated . NHTSA complaints received through October 19, 2026; safety ratings from NHTSA's 5-Star program.
Other Hyundai Sonata Model Years
2018 Hyundai Sonata: Frequently Asked Questions
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Get the Full 2018 Hyundai Sonata Report
10 sections of AI analysis based on 555 owner reports. Know before you buy.