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.

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definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
38,417 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 Kia Amanti engine problems

engine problem

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2004 Kia Amanti Owner Comments

problem #11

Feb 272014

Amanti 6-cyl

  • 74,000 miles


Kia Amanti losing power while driving or losing power then accelerating out of control and Kia seems not to be able to fix the problem.

- Macomb, MI, USA

problem #10

Jul 162012


  • miles
I was on the highway going out of town and had the cruise control set like I normally do when all of a sudden my car drastically lost speed from 70mph to 45mph on a very busy highway. I had to slowly move over to the far lane in order to make it to a safe place to pull over. I then pulled over shut the car off for about 20 mins and tried to come back home and once again got on the highway when once again I lost power even tho I'm pressing the gas all the way down to the floor and its not even trying to gain power at all. I almost got into 2 accidents on the way home because of the loss of power. I have seen a lot of complaints on this website about the same recurring problems with other Kia Amanti owners and this problem needs to be fixed. This is my only vehicle and I'm scared to drive it. Please can someone give me some answers!!!

- Saint Joseph, MO, USA

problem #9

May 292012

Amanti 6-cyl

  • 62,000 miles
I was slowing down to a red light and the check engine light came on and the car died. I turned the key so I could begin to try to start the vehicle and I noticed the RPM's start revving up and its trying to over-accelerate when I put it in drive. I managed to get it to a safe spot but I was 100% worried it was going to cause an accident or accelerate out of control. It sounds very if not exactly similar to a lot of the other complaints. No codes come up for this issue and it is serious.

- North Fork, CA, USA

problem #8

Oct 122011

Amanti 6-cyl

  • 61,000 miles


While, backing out of garage the car accelerated on its own. Kia road tested the car and could not replicate the problem. A diagnostic test performed by J.B.a. Kia of ellicott city, md found nothing wrong. This is the second time that the car has had a sudden unintended acceleration incident. The first incident was reported to NHTSA in January 2010, confirmation (ODI number) for that report is 10375033. Kia replaced the accelerator pedal position sensor on 1/18/2011.

- Clarksville, MD, USA

problem #7

Jul 272010


  • 62,550 miles
2004 Kia Amanti engine races and lunges forward when applying the brakes at stop sign. This has happened 5 times and Kia says they can not duplicate it so nothing has been done.

- San Marcos, CA, USA

problem #6

Jan 032010


  • 53,000 miles
I was stopping for a stop sign and engine suddenly raced and could not depress the brake pedal hard enough to stop. Shifted into neutral and engine stopped racing and car screeched to a halt. This has happened four times in last two years and each time I have shot through the stop sign. I took car to dealer and each time was told that this has not been reported by anybody else and could not be duplicated. I was told it could be a possible vacuum leak, but an independent brake specialist has told me there are no leaks and the brakes are fine. Nothing else has been done. I am reporting the latest incident.

- San Marcos, CA, USA

problem #5

Apr 072009


  • 46,000 miles


The contact owns a 2004 Kia Amanti. While driving approximately 35 mph, the vehicle did not respond when the accelerator pedal was depressed. Immediately following and without warning, the vehicle accelerated with great force. The vehicle was taken to an authorized dealer, but they could not duplicate the failure. The vehicle was taken to an authorized dealer on five separate occasions for identical failures, but there were no resolutions. The throttle body assembly and accelerator sensor were replaced. The vehicle is currently being repaired. The failure mileage was 46,000 and current mileage was 54,000.

- Las Vegas , NV, USA

problem #4

Feb 162007

Amanti 6-cyl

  • Automatic transmission
  • 43,542 miles
Dear sir: I am the owner of a 2004 Kia Amanti. There are 43,542 miles on the odometer. The vehicle engine runs fine and then will suddenly go into lugging and misfiring at various speeds causing down shifting. When I turn the engine off and leave it to set overnight or for more than eight hours at work, the engine light remains on but the engine runs fine once started again. After a few more starts the engine light goes off. I took it to the dealership and told them of the symptoms. They ran tests and said they could find nothing wrong. They said bring it back when it does it again. Fine, so it goes into the misfiring on a weekend at night traveling the interstate. No chance to just leave the engine running for a dealership the next day. Now it runs fine again until another inconvenient situation. Problematically, the engine behavior creates a driving hazard at high and low speeds and could easily cause an accident. This is a serious safety issue that needs to be resolved by Kia, not by its ignorant or ill trained dealer mechanics. Are you familiar with this problem" is it the computer module that may have a short or crack in the housing? misfiring is a timing issue and most surely goes to the firing order and timing controlled by the advance mechanism and the module. Or is it the throttle system? or egr valve or solenoids? do americans need to die before Kia comes up with an answer" I need to get this fixed before my wife who panics may have a serious accident.

- Lecanto, FL, USA

problem #3

May 012004

Amanti 6-cyl

  • Automatic transmission
  • 500 miles
The contact stated the vehicle accelerated on its own. There was no warning, and it occurred with or without the cruise control activated. This happened more often when going up a steep hill. The vehicle slowed down when the brakes were applied. The vehicle has been to the dealership multiple times for this, but they were nunable to diagnose the problem.

- Dallas , GA, USA

problem #2

Mar 032005

Amanti 6-cyl

  • Automatic transmission
  • 20,000 miles
When merging into traffic and pressing the accelerator the vehicle just coasted. This occurred when have to give the car more than normal gas. The vehicle was taken tot he dealer for the fourth time for this problem. Since the problem could not be duplicated the dealer was unable to find or repair the problem. This did not happen at any certain speed. While the vehicle was in reverse it felt as if it were trying to accelerate on its own. This happened with the foot on the brake. The vehicle made a loud clunking noise when going over bumps. The dealer replaced the bushings and collars.

- Tacoma, WA, USA

problem #1

Mar 312004

(reported on)


  • Automatic transmission
  • miles
While driving at highway speed vehicle's acceleration decreased. The gas indicator went from 18.1 to 14.5 gallons.

- San Lorenzo, CA, USA

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