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really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
1 / 0
Average Mileage:
119,389 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.

2007 Chevrolet Impala engine problems

engine problem

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2007 Chevrolet Impala Owner Comments (Page 1 of 2)

problem #24

Jan 172017


  • 112,000 miles


Last may I was driving my car from work going approximately 40 mph a message came on the information screen. Something about going over 160mph. The car suddenly slowed, couldn't seem to find the proper gear. At the same time the speedometer was going up and down showing 60, 30, 80, 0. then it cut off. I put the rolling car into neutral and started it. It fired up immediately. I put in gear and continued until it was safe to stop. Let engine cool off and drove home. The speedometer continued to fluctuate, it also cut off and flashed the message again. Called dealership next morning and took in. They came back with diagnosis of transmission failure, need to replace. I shelled out $4000 for the transmission, now it is slipping. I drove home today and that message flashed across my screen along with the transmission struggling to find the proper gear. The speedometer was moving up and down. The speedometer was replaced when the transmission was replaced. I have contacted the dealership to schedule an appointment. I also made a formal complaint to GM.

- Hyattsville, MD, USA

problem #23

May 132016


  • 1,400,000 miles
My 2007 Impala recently shut off on me wouldn't move in drive as I sat in the middle of the highway with my kids it has been jerking since I hit 135000 miles it has a strong odor when I cut my ac on in as my car is running the engine has a strong odornow my car want drive at all an I see it has 3 recalls on it please let me what's going on with my car because that was so scary having break down on me in traffic.

- Charlotte, NC, USA

problem #22

Oct 232015


  • 140,000 miles
The contact owns a 2007 Chevrolet Impala. The contact stated that while driving at 60 mph, the accelerator pedal was depressed but the vehicle failed to accelerate as the reduced engine power error message displayed. The vehicle was taken to a dealer where it was diagnosed that the accelerator pedal needed to be replaced. The vehicle was repaired. However, the failure recurred. The manufacturer was notified of the failure. The failure mileage was 140,000.

- Chicago, IL, USA

problem #21

May 132015


  • 69,000 miles


The contact owns a 2007 Chevrolet Impala. While traveling at 40 mph, the vehicle began to accelerate without the accelerator pedal being depressed. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 69,000.

- Arona, OR, USA

problem #20

Aug 072014


  • 140,000 miles
While driving my vehicle, the traction control light and check engine light came on...then a message stating "engine power reduced" came on. My car dropped the speed from 60 to 20, on the highway. It happened again a month later and I was told that my accelerator pedal needed to be replaced. This happened again in March of this year, and I was told my fuel pump had gone out. Now it has happened again this morning, and the mechanic doesn't know what's wrong with it because it happens intermittently so he can't diagnose it unless it does it while the car is in his possession.

- Memphis, TN, USA

problem #19

Jul 202015


  • 108,000 miles
While driving, my car gives a message of "reduced engine power" and completely shuts off...regardless of what speed I am driving. This has happened 3 times in the past 2 days. Very unsafe! I have read online of hundreds of this same type vehicle having this problem. Why isn't this a recall issue? I believe another car manufacturer had a similar issue with one of their accelerator parts and that company recalled and replaced these parts for no charge to the owner. I believe Chevrolet needs to do the same thing.

- Saint Louis, MO, USA

problem #18

May 122015


  • 34,000 miles


The contact owns a 2007 Chevrolet Impala. While driving approximately 60 mph, the reduced engine power warning light illuminated and the vehicle drastically reduced speed from 60 mph to 30 mph. The contact was able to coast the vehicle over to the side of the road and was able to restart the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The approximate failure mileage was 34,000.

- Philadelphia, PA, USA

problem #17

May 022011

Impala 6-cyl

  • 80,000 miles
While driving my "service traction control" message came on followed by "reduced engine power". it slows down my vehicle and sometimes I cannot even accelerate when these messages appear. They always come on together and every single time I drive. Sometimes right away, sometimes after I've been driving for awhile. It use to not happen when I was using my cruise control but not even when that is on it happens.

- Goshen, IN, USA

problem #16

Mar 242015


  • 83,000 miles
At about 10 mph upon accelerating there is a growling noise and the ABS/traction control light comes on. This lasts for only a few seconds, but the car feels like it may not keep going.

- Sioux Falls, SD, USA

problem #15

Apr 142015

Impala 4WD 6-cyl

  • miles
While driving the traction control light comes on as well at reduced engine power. It drops the speed of the car down to 40 mph or lower. It does not accelerate easily when coming to a complete stop. This can cause an accident as I have had several near misses. The light will go off if you turn the vehicle off for a few hours but does end up coming back on.

- Joelton, TN, USA

problem #14

Dec 172014


  • 156,956 miles


Driving down road at 65mph when all of a sudden reduce engine power comes on and my car shuts off the cruise and I cant get the power up over 15mph on a major highway............

- Deridder, LA, USA

problem #13

Aug 062012

Impala 6-cyl

  • 80,759 miles
My in-laws were driving their car when suddenly the accelerator pedal was unresponsive. Luckily, they were not injured but were able to coast to a stop. They were towed to a service center where the accelerator pedal position sensor was replaced. Total cost was $317.41.part number 25830023 I retrieved this part and opened it up. I was startled to find that parts of the circuit board were never soldered. I am a licensed master electrician, have an aas degree in electronics technology and as a hobby have been doing automotive repair for 45 years. This part should never have left the factory. I contacted GM and they simply said the part is not on our recall list so we will not reimburse you or look into this any further. I have the part. I'm guessing there could be many more just like this. My in-laws are 80 and I'm pursuing this for them. They have sold this car. Thanks.

- Detroit Lakes, MN, USA

problem #12

Feb 282009


  • 60,000 miles
The contact owns a 2007 Chevrolet Impala. While driving approximately 30 mph and attempting to avoid a crash, the vehicle accelerated forward when the brakes were engaged. As a result, the contact's vehicle struck another vehicle. A police report was not filed and there were no injuries. The manufacturer was notified of the failure. The approximate failure mileage was 60,000.

- Long Beach, MS, USA

problem #11

Aug 242014

Impala 6-cyl

  • miles
I was driving down the interstate about to get off on a exit and the service brakes and service traction control light came on. The car was unable to slow down, the car jerked and the brakes went out.

- Milwaukee, WI, USA

problem #10

Apr 302014


  • 60,400 miles
The contact owns a 2007 Chevrolet Impala. The contact stated that while driving approximately 55 mph, the engine stalled and the electronic throttle control warning light illuminated. The contact was able to restart the vehicle on the first attempt. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage and current mileage was 60,400.

- Tyrone, PA, USA

problem #9

Jan 312014


  • miles
The vehicle has a reduce engine display and the acceleration starts to slow down the car to around 40mph. Sometimes the car will shut off.

- Fisherville, KY, USA

problem #8

Oct 232013


  • 150,000 miles
My wife's daily driver is a 2007 Impala. She was driving home with our three kids when the car started shaking and the reduced engine power display came on. After that she could only go about 25mph. This scared her and could have caused an accident. I looked online and found forums about a lot of people having the same problem and it pisses me off that GM hasn't recalled these vehicles. Does someone have to die before this situation is taken care of?

- Neely, MS, USA

problem #7

Jun 242012


  • 96,000 miles
This car has less than 100K miles and Chevy dealerships refuse to diagnose the issue with the transmissions and there are multiple complaints about this issue this car is unsafe. The issue is random jerking of the transmission upon taking off in traffic, at light, or from stand still has caused: (a) my wheels to spin, (B) the car to pull into the next lane, (C) almost rear-end collision with car in front, and (D) sudden rapid acceleration in traffic. The car I almost rear-ended was a 2007 Chevy police Impala the officer exited his car asked was there a problem I told him about the transmission issue and he stated "yea mine does that too this car isn't a safe one" this need to be addressed nationally.

- Columbus , OH, USA

problem #6

Apr 232012


  • miles
While I was driving an error message appeared on the panel "engine power reduced". the car immediately slowed down as if the engine had cut-off completely. It did not and I was able to drive to the side of the road at about 10 mph. Luckily it was late at night, the few cars that were driving near me were able to change lanes before a collision occurred.

- Chester, VA, USA

problem #5

Sep 192011

Impala 6-cyl

  • 21,000 miles
The contact owns a 2007 Chevrolet Impala. The contact stated that attempting a right turn, the vehicle suddenly accelerated and she was unable to engage the brakes. The contact mentioned that the vehicle crashed into a brick wall. A police report was filed and the driver was badly bruised. The vehicle was towed to the dealer who was not able to diagnose the failure. The manufacturer was not made aware of the failure and the vehicle was not repaired. The failure and current mileage was 21,000. Updated 11/29/11 updated 12/02/11

- Birmingham , AL, USA

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