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 Problems


fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
13,731 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 Pontiac Bonneville exhaust system problems

exhaust system problem

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1998 Pontiac Bonneville Owner Comments

problem #3

Apr 212003

Bonneville 6-cyl

  • Automatic transmission
  • 41,192 miles


Upper intake manifold failed in my 1998 Pontiac Bonneville while driving on the interstate and caused the engine to hydrolock. This failure caused additional failures of the starter and spark plugs. Also the lower intake manifold was replaced without failing with a redesigned part. This leads me to believe that GM thinks there is something wrong with these manifolds that they need to be replaced with redesigned parts even if they don't fail. Total cost of repairs was $1600.

- Des Moines, IA, USA

problem #2

Nov 051999


  • Automatic transmission
  • miles
While driving in city at aprox 35mph warning light came on for emission control. Contacted dealer, who said that it was the transmission, and it was not under warranty. But vehicle needed a new transmission.

- Tacoma, WA, USA

problem #1

Jul 041999


  • miles
Consumer reporting a rental vehicle from hertz/ concerning following problems, 1) left side windshield wiper works intermittently; 2). Fuel vapors leaking into vehicle, and 3) trunk lid will not close properly, causing exhaust vapor enterning the vehicle. Reported these condition to NHTSA. Rental vehicle located in St. Paul, mn.

- Anchorage, AK, USA

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