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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
66,625 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.

2001 Chevrolet Impala exhaust system problems

exhaust system problem

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2001 Chevrolet Impala Owner Comments

problem #8

Jun 152009


  • 128,000 miles


The contact owns a 2001 Chevrolet Impala. While driving between 60-65 mph, the vehicle decelerated and would not drive over 30-35 mph. The RPM's appeared to be normal. The contact took the vehicle to a repair shop and a mechanic replaced the oxygen sensor and filter, but that did not correct the failure. The mechanic stated that the catalytic converter failed. The current and failure mileages were 128,000.

- Waterloo, IA, USA

problem #7

Jun 092008

(reported on)

Impala 6-cyl

  • miles
2001 Chevrolet Impala with severe engine problems. Consumer states that a valve that was touching the engine melted. The melting of the valve caused burning to the fuel lines, electrical lines, vacuum lines, and protective coverings. The consumer stated the problem was with the catalytic converter.

- Agawam, MA, USA

problem #6

Dec 012005

Impala 6-cyl

  • Automatic transmission
  • 72,000 miles
The catalytic converter failed and was covered by a GM special policy. Due to the failed catalytic converter the upper intake manifold also failed resulting in an expensive repair bill. GM would not cover the cost of the upper intake manifold even though it failed from a known issue. The repair bill states, "upper intake manifold failure due to catalytic converter failure."

- Spring Hill, TN, USA

problem #5

Nov 082004

Impala 6-cyl

  • Automatic transmission
  • 50,000 miles


The contact received a letter, but this was not a recall letter. The letter stated the catalytic converter was being replaced due to the end cone insulation breaking away and blocking the front of the first catalytic converter, and preventing the free flow of the gas. This vehicle was not included because it was over the mileage limit. The vehicle has been taken to 2 separate transmission mechanics and they told him it was the catalytic converter, and not transmission.

- Philidelphia, PA, USA

problem #4

Jun 302005

Impala 6-cyl

  • Automatic transmission
  • 122,000 miles
On 6/29/05 I was driving down the road and loss power. The car would only go a few miles per hour. It was hesitating upon take off. I drove it home and called a tow truck. It was picked up and taken to a repair shop. I was told that I needed a catalytic converter. I paid to have a catalytic converter and all parts replaced.

- Knightdale, NC, USA

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problem #3

Jul 302005

Impala 6-cyl

  • 80,000 miles
2001 Chevrolet Impala had a clogged catalytic converter.** answer required***. the vehicle lost pressure while driving up a hill, the battery had gone dead without warning, rear defroster shorted out and almost injured the consumers daughter, the doors seized, the driver window seized constantly, and the fan blower only worked on 5.

- Westbrookville, NY, USA

problem #2

Aug 032005

Impala 6-cyl

  • Automatic transmission
  • 81,000 miles
I have a 2001 Chevy Impala it has a completely clogged catalytic converter according to my mechanic. I contacted country Chevy in warwick NY they cant help me w/O charging me because the warranty expired 1800 miles ago. I understand from there serv dept as well as numerous mechanics this is a big problem. The vehicle has no warning light for this or I may have know prior to warranty expiring. Now I have a car I paid cash for that I cant drive. I was wondering if there have been any prior complaints. I am contacting GM to see if they can assist me further.

- Westbrookville, NY, USA

problem #1

Apr 102003

Impala 6-cyl

  • Automatic transmission
  • miles
My vehicle was towed to the dealership on 10 April,2003, the catalytic converter/ exhaust system had to be replaced, my car doesn't even have 47,000 miles on it and it is just barely 2 years old"??" the engine lost all power, the parts were replaced, the transmission was flushed, but.... the vehicle still doesn't have the power that it should have and the transmission is not shifting like it should, now I was told that when the catalytic converter went that it sent pieces though the lines in the car, I did ask the dealer if this would be cause a problem with the engine or the transmission and the response was (it shouldn't) now this does sound like a problem to me.... I would like someone to look into this matter and give me a real answer on this problem...the problem that this vehicle had is kind of unheard of in the early stage of mileage and age.. the dealership was even confused on the problem, all computers that the car was placed on by different shops should nothing was wrong with the car, until it was put on a flat bed and taken to the dealer.... I would appreciate any help you can give me in this matter....

- Waldorf, MD, USA

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