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Electrical systemPart report

2003 Hyundai Sonata Electrical system Problems

Complaints
19about this part
Share
10%of 199 total for the year
Median mileage
45,000miles
Trend
FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.

NHTSA recorded 19 complaints about the electrical system of the 2003 Hyundai Sonata, 10% of the 199 complaints for this model year. Where a mileage was given, the median is 45,000 miles.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“The air bag light is constantly on, meaning that in the event of an accident, they will not deploy. Incredibly dangerous. This is apparently due to wiring underneath the passenger seat stretching and pinching from moving the seat itself and when things are placed underneath the seat that may disturb the wiring. I know it is the wiring underneath the passenger seat due to checking the trouble code and also being able to temporarily fix the issue for a couple weeks by gingerly moving the wires until the light went away. Now I can't get the light to go away no matter what methods I try. …”

NHTSA complaint #11100227, filed 2018-06, 136,000 miles

“My neighbors informed me that my brake lights were stuck on. One of them researched and read that it may be the m48 stop lamp switch. We found the plastic backing portion from the contact plate that pushes the switch in. It was broken in pieces and laying on the floor mat below the brake pedal. He replaced it with something that is temporarily doing the job. I will be taking my car into the Hyundai dealer next week to have this fixed. They will also be replacing my gas tank that got punctured while they were replacing the valve-canister cl, canister assy., and valve-purge contr. Back in feb. …”

NHTSA complaint #10629321, filed 2014-08, 142,000 miles

“One morning the car would not unlock with the keyless remote, I unlocked it with the key, then went to the store and locked it. Came out of the store then I unlocked it with the key again and started driving down the street. About 5 min into the drive, my doors automatically locked. At this point I was a little shocked because my doors never lock. Then all of a sudden the alarm started to sound. I was very afraid that the car would lock up. I finally kept pressing the unlock button on the key ring and it shut off. No problems till after work. …”

NHTSA complaint #10202829, filed 2007-09, 45,000 miles

“Car has just over 62,000 miles and has had all maintenance completed on time. Leaving the gym I unlocked my doors using the remote and got in. I started the car and fiddled with the radio for a couple minutes before pulling out. When I got on the road the locks all locked (as if I had pressed the remote locking button!). I pressed the unlock button on the drivers side door panel, only to have the alarm go off and the hazard lights come on as I drove down the road. I pulled over and used the remote to lock the car back and unlock it again, and the alarm stopped. …”

NHTSA complaint #10215821, filed 2008-01, 63,000 miles

“Two weeks ago I drove down the street to the store, was in there for about 15 min and when I came out the car would not start. I have learned and now own my own jumper cables. I asked someone to jump it for me. Then I drove to the light and while waiting for the light to turn green the stereo went off, then the clock went off, then the lights in the dash went out, then the air conditioner when out, and last but not least the airbag light came on. The car was still running though. As soon as the light turned green and I started to drive everything started working again. …”

NHTSA complaint #10202826, filed 2007-09, 45,000 miles

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
202516%
20241940%
20231214%
20221718%
20211813%
20204022%
2019127%
20186016%
2017658%
20168912%
201516714%
201413518%
201326114%
201223515%
201144413%
2010165%
20096113%
2008328%
2007517%
2006868%
20051912%
2004178%
20031910%
2002237%
200194%
20003713%
1999119%
199848%
1997510%
1996522%
1995812%
1993727%
199215%
1991517%
1990319%
198919%

Other parts of the 2003 Hyundai Sonata

Air bags
43 complaints
Body and structure
38 complaints
Fuel system
18 complaints
Brakes
15 complaints
Suspension
15 complaints
Engine cooling
14 complaints
Latches, locks and linkages
13 complaints
Transmission and drivetrain
10 complaints
Wheels
10 complaints
Steering
9 complaints
Seat belts
7 complaints
Tires
7 complaints

← All problems reported for the 2003 Hyundai Sonata

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology