definitely annoying
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
42,354 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 Sonata Hybrid engine problems

engine problem

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2012 Hyundai Sonata Hybrid Owner Comments

problem #2

Sep 032013

Sonata Hybrid

  • 77,259 miles


The car was at a stop light and burst into flames, all of the sonatas have this problem, all sonatas will at the least burn up the engines, transmissions, or batteries due to this problem. Out of 35 sonatas tested 35 had this problem. Contacted Hyundai usa, Hyundai fullerton, Hyundai consumer complaint line and they refuse to do anything about it. Every sonata hybird in the world, (to the best of my knowledge) will burn up the engine, transmission, or lithium batteries (which will catch fire) between 70,000 &120,000 miles, Hyundai will not warranty the failure, this is caused by a manufacture defect.. a part in the cooling system will disintegrate and crumble apart like a wet cookie, then you will have a 3/4" hose coming off the water pump pumping all the water out of the cooling system, with less then a gallon of coolant this will take 2 seconds, everything will overheat and you can throw that car away, a new engine is $7,000 a transmission, $6,000 lithium batteries $10,000 all prices do not include installation..

- Kahuku, HI, USA

problem #1

Dec 122012

Sonata Hybrid

  • 7,450 miles
While slowly moving downhill, on the freeway, during rush hour traffic, I attempted to change lanes and accelerated quickly. The switch from hybrid to gas engine interface only caused the engine to rev (increase RPM) without any gear being engaged. I quickly let off the peddle and depressed it again. It then engaged the transmission, narrowly averting an accident. This has happened 5-6 times since purchasing this car when traveling slowly and then trying to get a burst from the gas engine. I spoke with the dealership, and took it in for a check per their recommendation. They found nothing and could not reproduce it, although they did not try the same circumstance. They only attempted to stop and accelerate at which I said they wouldn't get it to happen that way.

- Temecula, CA, USA

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