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really awful
Crashes / Fires:
1 / 13
Injuries / Deaths:
1 / 0
Average Mileage:
75,761 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.

2003 Chevrolet Impala engine problems

engine problem

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2003 Chevrolet Impala Owner Comments (Page 4 of 4)

« Read the previous 20 complaints

problem #9

Oct 102012


  • 100,180 miles


Head gasket failure cost of repair $1800.

- Montgomery, IL, USA

problem #8

Jun 042013


  • miles
The contact owns a 2003 Chevrolet Impala. The contact stated that while the vehicle was parked, the vehicle caught on fire without warning. The contact called the fire department to extinguish the fire. The fire department could not determine what caused the fire. The contact did not call the manufacturer. The vehicle was not inspected or repaired. The failure mileage was unknown. The VIN was not available.

- Thompson, GA, USA

problem #7

Mar 012013

Impala 6-cyl

  • 257 miles
Car will shut down while driving and security light will flash. Has done it numerous times, worried it will cause an accident. There are multiple cases of this problem on internet.

- Johnstown, OH, USA

problem #6

Mar 112013

Impala 6-cyl

  • 67,483 miles


Bought this 2003 Chevrolet Impala on Jan. 2 2012 and rocker arms have been replaced 6 times since then, just today March 11,2013 ( miles are 67483) back in for same thing, car was just in on Feb. 13,2013 for rocker arms ( miles were 100396) and the dealer put a new engine in and in less then a month back in same thing. Head lights don't work right.this car is faulty and should be recalled and off the road before someone kills them self or someone else. When the rocker arms went didn't have power and almost crashed onto a was when turning a bend.very dangerous vehicle!!!

- Pittsburgh, PA, USA

problem #5

Feb 152013

Impala 6-cyl

  • 108,000 miles
Blown head gasket. Doing searches on internet, there are thousands of complaints for this issue with this engine type! spare us all the expensive repair cost and issue a recall already!

- Daly City, CA, USA

problem #4

Sep 122012

Impala 6-cyl

  • 52,000 miles
Engine accelerates to 3,000 RPM during warm up (sometimes). Usually occurs about five minutes after cold start. Has lasted 10 to 15 minutes while driving. Has not repeated during same day and not happen again for days or weeks during the past five months. Replaced ECM (computer), iac (idle air control), coolant temp. Sensor and cleaned throttle body. Dealer cannot suggest solution. Unable to get car to dealer while problem is happening. Scanned for dtcs multiple times, none. Controlling speed with brake is not a good solution. Safety hazard! the consumer stated when the body control module failed, the key fob would not work, the engine would not start, the interior lights would not come on and the head light would not turn off. The consumer had to disconnect the battery, in order to turn the head lights off. After reconnecting the battery, everything returned to normal. The BCM was replaced. Updated 03/19/13

- Vine Grove, KY, USA

problem #3

Oct 242012

Impala 6-cyl

  • 119,000 miles


When I attempt to start the vehicle, the security light flashes, radio locks up and the car stalls. After reading the manual and contacting a dealer, I was advised to turn the key into the on position and wait for the security light to stop flashing, then start the car. The first time this happened it took over an hour for the car to start. The second time, it took over an hour as well. This is the third time and im on day 2 of leaving the key in the on position and nothing is happening. I contacted the dealer again and at first I was told I needed to bring it in for a security system reset. Then I was told that I need to replace BCM without anyone actually looking at my car. After researching online, there are several complaints regarding this same issue on model 2000-2005. GM is clearly aware of this defect but refuse recall. Those that have paid over $500 to fix replace the BCM are still having the same issue. Can GM be held accountable for the flaw that they are aware of yet charging people hundreds of dollars to fix a part that may not be broken?

- Saint Louis, MO, USA

problem #2

Nov 022012


  • 140,000 miles
The contact owns a 2003 Chevrolet Impala. The contact stated that she was putting oil in the vehicle when she began to smell plastic burning and then saw sparking coming from underneath the engine. The contact stated that as soon as she saw the sparks, the engine ignited into flames. There was no injuries and the vehicle was destroyed. The police and the fire department came and filed reports. The fire department was unable to determine the cause of fire. The dealer was notified but provided not assistance. The manufacturer was not notified. The failure mileage was 140,000.

- Greenfield, OH, USA

problem #1

Jan 152012


  • 100,000 miles
The contact owns a 2003 Chevrolet Impala. The contact stated that while driving 45 mph the vehicle stalled. The vehicle was taken to a personal mechanic for diagnosis and was informed the vehicle would need a new crank shaft position sensor. The vehicle was repaired. Five months later the failure recurred. The vehicle was again taken to a personal mechanic and had the mass air flow sensor replaced. The failure recurred again and the cam shaft sensor and O2 sensors were replaced. The manufacturer was notified but offered no assistance. The vehicle had not been repaired. The failure mileage was 100,000 and the current mileage was 119,000.

- Strasburg, VA, USA

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