Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2003 Hyundai Elantra owners, lightly cleaned up (personal details are redacted by NHTSA).
Emission control system failure. I just had my vehicle repaired for a failing vapor canister purge valve that causes the check engine light to illuminate. This valve is part of the evaporative (EVAP) emission control system. According to my mechanic, the faulty valve stays in the open position which also causes the charcoal from the canister to release into the fuel lines,clogging it. The symptom of this problem causes you to start having trouble filling your gas tank. The gas hose keeps shutting off at the beginning of the fill acting as if there is a vapor lock. It won't let me put in much more than 25-50 cents before the gas hose cuts off. This repeats many times. It takes me between 15 to 20 minutes to fill up my gas tank. …
Tl contact owns a 2003 Hyundai Elantra. The contact stated that the vehicle began to emit smoke and stalled. There were no prior warnings. The dealer first replaced the head gasket and engine but the failure occurred again. The dealer then replaced the head gasket again. The failure occurred for a third time. The failure mileage was approximately 50,000 and the current mileage was approximately 60,000.
My car problems started approximately 6-8 mos after purchasing the vehicle. I was having problems with the car starting, engine, radiator, gasket, alternator, and fuel sector just to name a few issues. Over the years, I had this vehicle in and out of mechanic shop & Hyundai dealerships. The vehicle was brand new, and I left off of the lot with no more than 10 miles on it. I am furious because I knew that the vehicle was a lemon, however the Hyundai dealership kept fighting me on the claim. After 9 yrs. With this vehicle, I have spend approx. As much the vehicle, just on repair alone. I contacted the bbb and Hyundai about my concerns and would like for my claim to be reviewed in its entirety. The car fax report will show every repair on my vehicle. If you have any questions or concerns, please feel free to contact me at[redacted] or [redacted]. Thank you for addressing my concern. …
I have a 2003 Hyundai elananta gt. There is a whining noise from both sides of the front of the vehicle when driving on the highway at high speeds, sometimes at 55 MPH or at 75 MPH. The dealer replaced the left front wheel bearing on 4/22/03. The noise on the left went away. The same noise surfaced on the on the right side of the car. On 5/22/03 the dealer replaced the right front engine mount, they said it was coming apart. Once I drove the car on the highway again on 5/29/03 the noise was there. I also still heard the whinning noise from the left side of the car again, but for just a couple of seconds. The right side will make noise continuously. Now I have to go back to the dealer again, wasting more of my time, money, and extra miles on my car. I live 130 miles from the nearest Hyundai dealer. …
2003 Hyundai Elantra, 138,000 miles. When driving on highway 9/18/10, suddenly began to smell (burning), white smoke from engine, then check engine light came on and temp gauge showed extremely hot - no warning before the engine overheated. Mechanic says problem was clamp in radiator that either corroded or somehow came off. Result is that the entire engine is damaged, and we have to replace it. My concerns are (1) this seemed to happen with no warning. There was no leak or symptoms of problems before the engine overheated and was irreparably damaged. (2) we had this exact same problem about 2 years ago. Same scenario - driving on highway, engine overheated without warning, caused much engine damage. At that time, we were able to fight for some warranty coverage from the dealership. Now, we are well past the limits of the warranty. …
Ck engine light came on 3 times took it to dealer said no problems just needed to reset codes??? About 2 yrs. Later was driving in my 2003 Hyundai Elantra in sept. Of 2009- a very hot day101-without warning no temp lights (nothing) I saw white smoke coming from the hood at first thought maybe heat waves- then car started to loose power-pulled over (very dangerous) due to loosing power on the highway quickly with many people due to fri.-labor day weekend 5 pm- anyway pulled over to see that car was smoking (white smoke) engine was so hot it melted the radiator-went to dealer (bill dube Hyundai) said warranty just ran out- because car engine was seized and did not work plus that fact that I still owed so much money on bank loan they could not possibly trade it in-so I had to replace the engine and radiator and still pay bank loan.
My wife was driving on a freeway approx 65 MPH when she heard a loud pop, looking at the dash board all gauges reported nothing wrong. Suddenly a large amount of white smoke came from under the hood, blinding her visibility and cars behind her. She was able to veer off to the median and call for assistance. The repair shop noted that a plastic reservoir tank exploded and drained all coolant and damaged the radiator and recommended calling Hyundai since car is in warranty and suggests that engine damage (seal damage May result in complete damage of engine and need replacement) the car is currently at dealership. This is a similar report as listed and May cause serious injury or death due to smoke disabling drivers view.
Tl contact owns a 2003 Hyundai Elantra. The contact had to depress the brake pedal down to the floor in order to stop the vehicle. The failure occurred while driving 35 MPH. While at the dealer for an oil change, they tested her power brakes while the engine was running. The brake failure occurred after the test was completed. The front brakes were replaced. The current mileage is 55,000 and failure mileage was 54,831. There was an EVAP leak. Updated 08/06/07. The consumer provided multiple repair invoices pertaining to the defect. Updated 08/09/07 updated 08/28/07 the dealer stated the transmission was fine but the motor lacks performance. Updated 09/06/07
Consumer stated that while she was on the freeway driving at about 65-70 MPH, she witnessed an object flying by. She stated she looked down and all of her gages were fine, then suddenly she saw smoke, she states she pulled to the side and got herself and her child out of the vehicle. She then looked under the vehicle and saw pieces were hanging from the engine. She states by this time all of the smoke that she had seen was gone. She stated that she called the tow truck and had her vehicle towed to a dealer. She states she could have been killed, along with her infant. The consumer stated that the engine was blown and had to be replaced.
Vehicle experienced sudden acceleration after brakes were applied. Consumer applied all his weight onto the pedal and it didn't stop until a couple of feet behind the line. He realized the engine was revving up with his foot on the brake and not the gas. His wife suggested he shift to park. When he did, it sounded like the engine was going to fly out. He shifted back to drive, keeping full pressure on the pedal. After the light changed, he carefully released his foot and the engine returned to normal idling. Consumer planned to get it serviced but wanted a record of the failure on file.
Engine complaints in other Elantra years
Frequently asked questions
How common are engine problems on the 2003 Hyundai Elantra?
NHTSA has 22 complaints about the engine & cooling of the 2003 Hyundai Elantra, 9% of the model year's 234 complaints. The component named most often is engine (9 mentions).
Is there a recall for 2003 Hyundai Elantra engine problems?
No. NHTSA lists no engine & cooling recall for the 2003 Hyundai Elantra, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2003 Hyundai Elantra engine problems start?
Half of the complaints with a recorded mileage happened before about 41,000 miles, and 33% before 25,000 miles.
Is it dangerous?
Owners linked 0 crashes, 1 fire and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.