AI Damage1991 Hyundai Sonata: common problems
Owners of the 1991 Hyundai Sonata filed 29 complaints with NHTSA, most often about seat belts and powertrain. Details by component below, with sources.
Key figures
- Owner complaints
- 29
- involving a crash
- 3
What fails most often
- 1 Seat belts 31% of all complaints
- 2 Powertrain 24% of all complaints
- 3 Engine and cooling 21% of all complaints
- 4 Electrical system 17% of all complaints
- 5 Service brakes 10% of all complaints
- 6 Air bags 3% of all complaints
- 7 Steering 3% of all complaints
- 8 Vehicle speed control 3% of all complaints
- Seat belts: 9 complaints (31% of all).
- Powertrain: 7 complaints (24% of all).
- Engine and cooling: 6 complaints (21% of all).
- Electrical system: 5 complaints (17% of all).
- Service brakes: 3 complaints (10% of all), 1 of them with a crash reported by the owner.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2.4 L · petrol · 4 cyl
- 3 L · petrol · 6 cyl
- automatic, 4-speed
- manual, 5-speed
Drive: FWD
Symptoms owners describe
How many of the 29 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Seat belts | 9 | 0 | 0 |
| Powertrain | 7 | 0 | 0 |
| Engine and cooling | 6 | 0 | 0 |
| Electrical system | 5 | 0 | 0 |
| Service brakes | 3 | 1 | 0 |
| Air bags | 1 | 1 | 0 |
| Steering | 1 | 0 | 0 |
| Vehicle speed control | 1 | 1 | 0 |
| Visibility | 1 | 0 | 0 |
| Wheels | 1 | 0 | 0 |
| Other | 2 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The consumer stated the air bag recall was performed on the vehicle, however the air bag light continued to illuminate and the vehicle was serviced three times to correct the problem. The consumer's wife was involved in a one car accident in which the air bags failed to deploy.
While driving highway, accelerator stuck; tried to stop; lost control; spunout 6 times; lurched backwards/forwards across highway; hit 2 trees; speed 80 mp.
Brakes failed, causing accident/loss of control/injuries.
Transmission has failed 3 times since ownership! Transmission is slipping, condition worsens with cold weather.
While driving at 45 mph transmission blew out, causing the vehicle to slow down, and keep changing into different gears. Vehicle has been in the repair shop three times for transmission failure. .
When driving at any speed without any prior warning the engine check light came on and will not go off. Also, engine/transmission leak. Consumer have been having problems every since day one.
Driver noticed smoke coming from car, turned off ignition, restarted the car and the key got stuck in the ignition and would not turn. A few minutes later, the car caught on fire in the engine compartment. Owner was able to put out fire, but the key would not come out of the ignition. The vehcle is being repaired.
Complete transmission failure, causing fluid to leak all over exhaust system creating smoke and small fire.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 6,958 of 36,656 model years in the NHTSA data (top 19% most complained about).
On average one model year of the Sonata has 403 complaints (40 years in the data). This year has 29, below average.
What to check before buying
- Seat belts. Belt pretensioners after airbag deployment, SRS codes.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
Other years of this model
- Sonata 198911 sources
- Sonata 199016 sources
- Sonata 199222 sources
- Sonata 199326 sources
- Sonata 19943 sources
- Sonata 199566 sources
- Sonata 199623 sources
- Sonata 199749 sources
- Sonata 199849 sources
- Sonata 1999124 sources
- Sonata 2000276 sources
- Sonata 2001205 sources
- Sonata 2002320 sources
- Sonata 2003199 sources
- Sonata 2004202 sources
- Sonata 2005165 sources
- Sonata 20061,047 sources
- Sonata 2007696 sources
- Sonata 2008425 sources
- Sonata 2009460 sources
- Sonata 2010345 sources
- Sonata 20113,380 sources
- Sonata 20121,559 sources
- Sonata 20131,918 sources
- Sonata 2014750 sources
- Sonata 20151,156 sources
- Sonata 2016914 sources
- Sonata 2017954 sources
- Sonata 2018532 sources
- Sonata 2019307 sources
- Sonata 2020283 sources
- Sonata 2021225 sources
- Sonata 2022176 sources
- Sonata 2023140 sources
- Sonata 202481 sources
- Sonata 202546 sources
- Sonata 202620 sources
- Sonata 99995 sources
Questions and answers
What are the most common problems with the 1991 Hyundai Sonata?
Owner complaints to NHTSA most often mention: seat belts, powertrain, engine and cooling. Total complaints: 29. The most frequent symptoms in complaint texts: smoke, burning smell, fire (21%), seat belts (17%), transmission slipping (14%).
How many service bulletins (TSB) were issued for the 1991 Hyundai Sonata?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 1991 Hyundai Sonata from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 1991 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.