Headlights burning out frequently was the first sign of problems, replaced them as the dealer said this was inherent to the 2001 Elantra. In August 2006 check engine light came on. Also, the air bag sensor light was on, headlight out again, took car to dealer, they called back and said that the alternator had been over charging and not only was the over charging burning out the headlights it also had taken out the cruise control module, and air bag module. Car had only 42000 miles on it, and was 2 weeks from being out of the 5 year bumper to bumper warranty. Well here it is 6 months later and 47000 miles and check engine light is back on, I have since purchased a diagnostic tool to read the codes. The car was running rough at idle. The codes came up as mis fire on cylinder 3, tps sensor failure and map barometer failure. I replaced the plugs and wires, engine still ran rough. Took car back to dealer they replaced the tps, still running rough, they suggested that because of the faulty tps that the excessive dumping of fuel into the jets could have caused one of them to be clogged. I had them clean the jets as well as replace the plugs and wires again (they had also found that #3 wire had been arcing.) this took care of the idle problem. I took the car home and the next day driving the car would surge between 3rd and 4th gear, engine light back on. Still have the map error. Dealer ended up replacing the map sensor. It has been about a month since this last occourence and all I can do is cross my fingers until I trade it in. Abl.pco

- Taylorsville, UT, USA

I have had nothing but problems with this vehicle. The headlight constantly were blowing out, it guzzles gas like crazy! then now two sensors are bad and per the dealer they have been having numerous problems with these sensors but won't replace them? I love Hyundai always had one but this one turned out to be a pain in the butt.

- Lancaster, PA, USA

Incident date is estimated. I have put approximately 17,000 miles on the vehicle during the course of each year (never more than 20K or less than 15K) and on three separate occasions, all between 9 and 15 months apart, my headlights have failed. On one occasion both lamps failed within a two weeks and before I could replace the first failed one resulting in a potentially hazardous situation where I would have had no headlights. Each time my local Hyundai service center has replaced them and on at least one occasion, made comments suggesting this was a common occurrence with my make/model vehicle. Interesting to note, the failures have always occurred in the winter.

- Huntington, NY, USA

One or the other of the headlights must be replaced at least once every six months.

- Hiawatha , KS, USA

Passenger headlight went out with in a year.

- North Patchogue, NY, USA

We had to replace the headlights several times with in the first year of owning our hyundia Elantra when on October 5, 2002. They went out resulting in an accident. My husband switched from brights to dim for on coming traffic when he noticed he was having problems seeing do to the front head lights burning out. He missed seeing a four way stop sign and side swiped another car going about 35mph. The passenger air bag deployed and shattered my left wrist which has resulted in 3 surgerys and daily physical therapy with hopes of getting the use of my hand back.

- New Bloomfield, MO, USA