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#BS-2018-HYUSON-240B

2018 Hyundai Sonata

Based on reports from 507 owners and 1 recall for this exact model.

Complaints
507
Crashes
23
Fires
18
Recalls
1
TSBs
192
🛑

Preliminary Verdict

Red Flag

Based on 507 complaints, 23 crashes, 18 fires, and 1 recalls. Complaint rate is 3.7x the class average.

See full verdict with buy/skip conditions

Top reported problems

1

check engine light on

12 complaints • Severity 8.3/10

$X,XXX
2

hard downshifts

6 complaints • Severity 7.7/10

$X,XXX
3

rodents eating soy-based wires

2 complaints • Severity 9/10

$X,XXX

Preview: What's in your full report

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Mechanic Inspection Checklist

!Check the EngineHIGH

201 owners reported engine issues — failures commonly reported around 20K miles.

!Inspect the ElectricalMED
Look for symptoms of wear and premature failure
+ 6 more items in full checklistUnlock

Failure Timeline by Mileage

119
0–30K
30
30–60K
17
60–90K
15
90–120K
11
120–150K
6
150K+

Peak failure range: 0–30K miles (119 reports) • Median: 20K miles

Full report: which components fail at each mileageUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Engine (201 reports).

Includes fuel costs, common repairs, and recall riskUnlock

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

10 sections total in the full reportUnlock all

Where the complaints fall

Engine201 (40%)
Other56 (11%)
Electrical54 (11%)
Drivetrain32 (6%)
Fuel System24 (5%)
Lights21 (4%)
Speed Control17 (3%)
Brakes15 (3%)

2018 Hyundai Sonata: Known Issues & Problem Areas

Engine Issues

Engine complaints account for 40% of all reports filed for the 2018 Hyundai Sonata, with 201 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 11% of all reports filed for the 2018 Hyundai Sonata, with 54 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 6% of all reports filed for the 2018 Hyundai Sonata, with 32 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 5% of all reports filed for the 2018 Hyundai Sonata, with 24 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

1
17
24
18
93
19
30
20
25
21
53
22
79
23
71
24
121
25
10
26

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

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Recall History (1 recall)

21V619000Dec 2021

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.

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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

507

Class avg

138

3.7x 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. 507 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.

Other Hyundai Sonata Model Years

20262025202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989198819871986
View all Hyundai Sonata years →

2018 Hyundai Sonata: Frequently Asked Questions

What is the most common problem with the 2018 Hyundai Sonata?
The most commonly reported issue with the 2018 Hyundai Sonata is related to the engine, with 201 complaints filed with NHTSA.
Is the 2018 Hyundai Sonata reliable?
The 2018 Hyundai Sonata has 507 complaints, 23 crash reports, and 18 fire reports filed with NHTSA. This is 3.7x the class average — higher than typical for its segment.
How much does it cost to fix 2018 Hyundai Sonata problems?
Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.
Does the 2018 Hyundai Sonata have any recalls?
Yes, the 2018 Hyundai Sonata has 1 recall on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.
What mileage do Hyundai Sonata problems start?
Based on 198 complaints with mileage data, the median mileage at time of complaint is 20,000 miles. The highest concentration of reported issues occurs in the 0–30K mile range. The full report breaks down exactly which components fail at each mileage bracket.
What’s in the full report?
10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.
How is this different from free NHTSA data?
NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.
How is this different from Carfax?
Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.
What if the report isn’t useful?
100% money-back guarantee. If the report doesn’t help you make a more informed decision, we’ll refund you — no questions asked.
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10 sections of AI analysis based on 507 owner reports. Know before you buy.

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