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.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

NHTSA — Engine And Engine Cooling: Exhaust System: Emission Control: Catalytic Convertor Problems


really awful
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
0 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.

1998 Mazda Protege exhaust system problems

exhaust system problem

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1998 Mazda Protege Owner Comments

problem #2

Jul 012002


  • miles


The catalytic converter was replaced back in 09/01. I was told it would be replaced for free! I left paying $66.11 to replace catalytic converter. I have also had to replace a portion of the ac unit on 05/23/02. One month later approximately 6/25/02 I then heard a loud exhust noise. I had the vehicle looked at by a friend who found that the manifold had a siginificantly large crack. Moreover, the smell within the passenger campartment of the vehicle is extreme to the point when we get out of the car we have the smell of exhust fumes in our hair and clothes. The smell in the car is very overwhelming, that we must ride with the windows open for fresh air and lets just say we only get relief for just a short while with the windows open because we live in Florida and it is usually too hot & humid to have the windows open during the daytime. On longer drives it tends to make me sleepy also my 5 year old rides in this vehicle and has a history of asthma. This to me is a great hadzard to all of our health especially to his. I wonder if this is all related to each other. Or is it something that everyone has had a problem with? sincerely, julia.

- Alachua, FL, USA

problem #1

Jan 051999


  • Automatic transmission
  • miles
I have returned my car for repairs a total of six times since new purchase in July 1998. The converter was replaced, but the car still has an egg smell. It also hesitates when shifting at low speeds. I filed a lemon law complaint in May 1999.

- Randolph, MA, USA

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