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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NHTSA — Engine And Engine Cooling: Exhaust System: Manifold/Header/Muffler/Tail Pipe Problems


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
57,467 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 Buick Century exhaust system problems

exhaust system problem

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2001 Buick Century Owner Comments

problem #3

Apr 152007

Century 6-cyl

  • Automatic transmission
  • 100,000 miles


The contact owns a 2001 Buick Century. The vehicle's intake manifold gasket failed at less than 100,000 miles on a brand new engine. The contact smelled anti-freeze and brought the vehicle to a mechanic who conducted pressure testing. The failure was diagnosed as the manifold gasket. It is a replacement engine and it is demonstrating the same failure as the original engine that was replaced at 35,000 miles by arbitration order. Buick has refused to pay for any failed components concerning this motor, including replacing the catalytic converter. The converter was plugged from the original motor failure along with the subsequent failure from the intake manifold gasket on the new motor. The power window regulator failed in January of 2007 for the second time. The current mileage is 145,000 and failure mileage was 100,000.

- Redlands, CA, USA

problem #2

Aug 212006

Century 6-cyl

  • Automatic transmission
  • miles
Manifold gasket needs to be replaced due to a small leak which is causing considerable amount of problems. All mechanics that I have taken this car to say there is a problem with this particular engine where GM changed to plastic gasket. All seem to have same diagnoses except GM and GM dealership.

- Greensburg, PA, USA

problem #1

Jun 012004

Century 6-cyl

  • Automatic transmission
  • 72,400 miles
Our well maintained 2001 Buick Century with a 3.1 L V6 has developed an intake maniold leak at under 75,000 miles. The car has been wonderful since purchased new - until now. Internet research has revealed that GM used a "plastic" intake manifold and it has been problematic. It was also revealed through research into gasket manufacturers that the 100,000 coolant is more corrosive that GM anticipated. Now, where does the responsibility lie for the manufacturer (Buick div) to take ownership as a responsible corporate citizen and provide some replacement cost relief to the customer? I currently own 3 General Motors vehicles, however only 1 with the problematic intake manifold design. I look forward to hearing from someone soon. As a marketing manager for a major company, I can assure GM that customer loyalty is what drives my business success. In order for me to select GM for my next vehicle, I would like them to tell me what they will do to remedy this design flaw problem of intake manifold gasket failure. Thanks, art pandaru.

- Richmond, KY, USA

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