"How reliable is the 1999 Hyundai Sonata?"

"Based on 187 NHTSA complaints, the 1999 Hyundai Sonata has a median complaint mileage of 95000 miles. The most common issue is Frame And Members."

"What are common problems with the 1999 Hyundai Sonata?"

"The most frequently reported component in NHTSA complaints for the 1999 Hyundai Sonata is Frame And Members, accounting for a significant portion of the 187 total complaints filed."

1999 Hyundai Sonata: Reliability Data

Source: NHTSA — 187 complaints

187

Total Complaints

95,000mi

Median Mileage

Frame And Members

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

61,500 25th Percentile

95,000 Median Mileage

125,633 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Frame And Members

Air Bags

Automatic Transmission

Engine And Engine Cooling

Suspension

Gasoline

Frontal

Unknown Or Other

Steering

Anchorage

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"HYUNDAI DOES NOT OFFER A SEAT BELT EXTENSION SO WE CAN BUCKLE"

"WHEN ACCELERATING TRANSMISSION DOES NOT SHIFT PROPERLY (DOWNSHIFTING OCCURS), MORE WHEN AIR CONDITIONER IS ON. *YC"

"CONSUMER'S SON WAS DRIVING BETWEEN 30 TO 40 MPH WHEN ANOTHER VECHICLE JUMPED IN FRONT OF HIM. HE APPLIED BRAKES, BUT BRAKES FAILED. HE LOST CONTROL AND WENT INTO A TREE . UPON IMPACT, AIRBAG DID DEPLOY, BUT DISCONNECTED AND LANDED ON DRIVER'S SEAT. HE SUSTAINED NECK AND BACK INJURIES. *AK"

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

Frame And Members 26 complaints

25th: 83,500 mi Median: 102,289 mi 75th: 131,461 mi

Air Bags 18 complaints

25th: 38,659 mi Median: 52,500 mi 75th: 68,500 mi

Automatic Transmission 11 complaints

25th: 41,500 mi Median: 66,063 mi 75th: 91,344 mi

Engine And Engine Cooling 10 complaints

25th: 57,750 mi Median: 92,000 mi 75th: 125,158 mi

Suspension 10 complaints

25th: 80,600 mi Median: 119,882 mi 75th: 155,250 mi

Where Are Complaints Coming From?

Top states by complaint count.

NY: 23 NJ: 18 MD: 13 IL: 10 OH: 9 FL: 8 LA: 7 KS: 6 TX: 6 MO: 5

Who Files Complaints?

21.9%

Original Owners

78.1%

Second+ Owners

Hyundai Sonata — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1990	25	-	Automatic Transmission	0
1991	41	-	Seat Belts	3
1992	43	-	Automatic Transmission	1
1993	46	-	Automatic Transmission	1
1995	93	107,263	Frontal	17
1996	37	-	Gasoline	0
1997	74	86,000	Tank Assembly	6
1998	68	80,000	Automatic Transmission	3
2000	378	108,000	Frame And Members	22
2001	293	89,863	Frame And Members	34
2002	407	94,724	Frame And Members	50
2003	247	70,178	Air Bags	28
2004	285	91,138	Suspension	36
2005	217	80,000	Air Bags	44
2006	1422	73,838	Air Bags	55
2007	905	67,000	Air Bags	45
2008	554	65,000	Air Bags	24
2009	610	68,783	Service Brakes	29
2010	415	65,000	Body	23
2011	4582	75,702	Steering	194
2012	2254	80,000	Engine	86
2013	2602	79,000	Engine	138
2014	1061	70,000	Engine	48
2015	1611	53,758	Engine	60
2016	960	62,100	Engine	37
2017	964	53,900	Engine	46
2018	519	19,862	Engine	26
2019	182	23,000	Engine	11
2020	236	2,700	Fuel/Propulsion System	8
2021	156	24,725	Engine	11
2022	123	13,500	Power Train	14
2023	130	11,000	Fuel/Propulsion System	12
2024	61	2,000	Electrical System	3

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28