Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
33,000 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 Kia Optima Hybrid engine problems

engine problem

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2012 Kia Optima Hybrid Owner Comments

problem #3

Dec 142015

Optima Hybrid

  • 42,000 miles


The contact owns a 2012 Kia Optima hybrid. The contact stated that the vehicle accelerated while in park and crashed into a garage door, without any warning. The contact reversed the vehicle and placed the vehicle in park. The contact mentioned when exiting the vehicle, it began to shake, jerk and attempted to accelerate. The vehicle was restarted however, the failure occurred on three occasions. The manufacturer was notified of the failure. The failure mileage was 42,000.

- Manteca, CA, USA

problem #2

May 152015

Optima Hybrid

  • 39,000 miles
Purchased the car used at 25000 miles from a dealership. Car was fine, smooth for about 10 months. Did oil changes as usual. Noticed some jerking recently when I would come to a complete stop but didn't really bother me at first. Then I noticed it was having trouble accelerating from a complete stop. It would sometimes take 3+ seconds for it to respond and start moving. The more I would come to a complete stop (bumper to bumper traffic) it would take longer to respond to accelerate. Couple days ago, I did the maintenance 30K service. I thought it would solve the problem but it still did its thing. I had the "hybrid system warning! safely stop and do not drive" message happen twice..once after the maintenance. I took it back to Kia and fortunately the guy did a test drive and replicated the issue with the lag. He also replicated the hybrid system warning message as well. I now have a loaner. Not sure how long it'll take but from the sounds of it from this forum, they dont know whats wrong. Hopefully I dont have to buy a new car =/ anyone with questions, email me at

- Fairfax, VA, USA

problem #1

Jun 302014

Optima Hybrid 4-cyl

  • 18,000 miles
While trying to accelerate, the car randomly has a 2-3 second delay before action. When the problem occurs, the car will coast out into traffic, which may be moving at high speeds. This leaves me exposed to getting hit on a frequent, but irregular basis, and I am afraid to drive the vehicle. The car can also have jerky motions and lunges when accelerating from a stop on an incline, posing a danger to pedestrians and cars nearby.

- Georgetown, TX, USA

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