Notes: Be aware that there's a significant trend of owners complaining that the Elantra's fuel economy is significantly less than the EPA estimates.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
40,742 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.

2012 Hyundai Elantra fuel system problems

fuel system problem

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2012 Hyundai Elantra Owner Comments

problem #6

Nov 302016


  • 66,432 miles


While driving engine light came on and car started running very rough. Took car to dealer and they found multiple cylinders injectors leaking down fouling plugs. Needed fuel induction kit and a fuel injector kit. Total cost $548.85

- Vero Beach, FL, USA

problem #5

Feb 162016


  • 51,000 miles
My car accelerate on its own without me pressing on the gas randomly. Some days it drives normally and other days I can feel the car accelerating on its own. It was so bad 2 days ago that when I got off the highway it was trying to accelerate into the car in front of me at a red light. I had by foot on the brake and the car was revving to 5000 rpms. I took it to Hyundai who could not find a problem but charged me $250 to clean the throttle body.

- New City, NY, USA

problem #4

Oct 272015

Elantra 4-cyl

  • 60,000 miles
Car would not start at all from overnight rest in our driveway. Called the Hyundai assurance line, they sent a tow truck for a battery jump, tow truck driver started the car without a jump by repeatedly pressing the gas pedal as he turned the key. He said it looked like the car was not getting enough gas and that he'd seen this many times before on runs for Elantras. Research suggests this is the 2nd leading cause of complaints for this model / year. Thank you.

- Gaithersburg, MD, USA

problem #3

Jan 172015


  • 67,000 miles


Car would not start. After multiple attempts at turning key, it finally started. Lights and horn functioned properly, but I replaced the battery anyway. Car would still not start on first few attempts. Engine would not turn over at all, then after several attempts at turning key, it would start, as if nothing was wrong. Brought it to dealer, they said they cleaned out some parts of the engine and updated the computer. The next day I had the same problem again. Brought it to the dealer, and they said they changed some fuses. Less than a week later, still the same problem. There are multiple incidents of this happening for other owners of this car which I found online when I was looking to diagnose the problem.

- Mahopac, NY, USA

problem #2

Nov 272012

Elantra 4-cyl

  • miles
I have had multiple instances where my car has trouble starting, or will not start at all. Beginning in 2012, when the car had to be towed to the local dealer (tustin Hyundai - patterson's) as it wouldn't start. The dealer had the car for roughly three weeks straight, and could not find a problem, so they decided to replace the fuel pump system. Then again in February 2013, my car still had issues starting properly, and the dealer and corporate headquarters were contacted. Additionally, on October 4th, my car would not start once again, and finally, after three times, it started. It is currently at glendale Hyundai for the same issue. I purchased this car brand new in 2012, and have had nothing but trouble. From the issues with starting, to my windows not rolling up. The start issue is a major problem and safety malfunction. As a young woman, I do not feel safe driving my car alone at night or long distances as I cannot count on it being reliable. Hyundai needs to issue a recall, as a simple google search brings up multiple others who have had similar issues, only to be told there is not a resolution.

- Newport Beach, CA, USA

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problem #1

Feb 162012

Elantra 4-cyl

  • 20 miles
I bought a brand new 2012 Hyundai Elantra on Feb. 10, 2012. Within several weeks I noticed the gas disappearing so quickly so I began filling the tank and taking pictures. I bought this particular vehicle due to the fact it advertised 40 mi. Gal on highway and 29 city. I took it to the dealership, I was told to fill car and reset trip and drive on highway. I did as they said on several occasions before going back. The trip continued to read 18 mph and approximately (as low as 10.9 and as high as 24.8 mpg) one of the mechanics (I guess he was a mechanic) took it for a ride, I waited; he was gone an hour. When he got back he said he drove 47 miles and got it to read 33 mpg in which he said he combined city and highway together. I have never got it to do that and I have been tracking it closely since I bought it. Also, the steering wheel squeals, I told them; they said it is nothing. The brakes (alloyed wheels) squeal after it rains, they said it is nothing. I smelled something coming from cabin filter, they said it is a big job to take apart to see what the smell is and they said they believed it is a dead animal in which I would have to pay for, I told them to forget it. They told me even though I only had about 1000 mi. On car after 3 mo. Went by they needed to change my oil so I had it changed. Everything is documented. I hope someone can help me. Thank you. [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Meriden, CT, USA

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