really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
94,362 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Hyundai Elantra engine problems

engine problem

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2004 Hyundai Elantra Owner Comments

problem #4

Mar 162014

Elantra 4-cyl

  • 77,000 miles


Have 2004 Elantra w/ 77,000 miles. Check engine light came on while starting car in am. Car has no symptoms of bad plugs,02 sensor, or catalytic conv. Issues. Runs fine, no different. I have the car checked diagnostically and they said the 02 needed changing and new P;lugs / wires. The wires/ plugs arent due for another 30K miles we thought, and the car running fine! was waiting to have this service done as we were given a $613 quote! in meantime the check light went off and car running fine! it had just had theoiil changed and a new air filter when this occured, and new gas. It seemed when the car was almost out of gas( I let it run low) I put a better grade from another station and this is when the engine light went off! why would this occure if it is needing plugs, 02 sensors"?? also no trouble, roughness or idle trouble, or power loss with this car. Could it be bad gas, airfilter issues?" please help!!

- Federal Way , WA, USA

problem #3

Mar 282014

Elantra 4-cyl

  • 99,597 miles
From stop sign proceeded to cross intersection, was struck on front end of drivers side panel and bumper, spun around and hit again on driver back side panel and rear wheel, ripped half of the front bumper and crushed drivers front side against engine, no air bag deployed.

- Orlando, FL, USA

problem #2

Nov 292013


  • 133,800 miles
The contact owns a 2004 Hyundai Elantra. The contact stated that after starting the vehicle, there was an increase in engine rpms as the vehicle lunged forward. The vehicle was not taken to the dealer. The manufacturer was not made aware of the failure. The vehicle was not repaired. The failure and current mileage was 133,800.

- Omaha, NE, USA

problem #1

Jan 272013

Elantra 4-cyl

  • 67,050 miles
I was driving on the highway and suddenly the oil light came on. At the same time, there was a loud noise so I pulled over and turned off my car. Minutes later I tried to turn it on but no life whatsoever. Got out of car and saw big oil spill along the side up to where I drove to. Drove car to mechanic. Engine had hole in the engine block.

- Jamaica, FL, USA

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