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: Manifold/Header/Muffler/Tail Pipe Problems

1998 Pontiac Bonneville (Page 3 of 3)


hardly worth mentioning
Crashes / Fires:
0 / 3
Injuries / Deaths:
0 / 0
Average Mileage:
46,737 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

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 1998 Pontiac Bonneville:

Unsubscribe any time. We don't sell/share your email.

1998 Pontiac Bonneville Owner Comments (Page 3 of 3)

« Read the previous 20 complaints

problem #7

Oct 112002

Bonneville 6-cyl

  • Automatic transmission
  • 100,000 miles


Vehicle stalled while driving on a busy interstate. The dealer stated the problem was the plastic intake had cracked, which dumped the engine coolant into the chunders and locked the engine. Mr scc

- Mt.Pleasant, SC, USA

problem #6

Jun 012002


  • Automatic transmission
  • miles
Anti freeze wad sleaking but not on ground. Dealer was contacted, and noticed anti freeze leaking into engine, intake manifold needed to be replaced.

- Toledo, OH, USA

problem #5

May 152002


  • miles
Engine (intake manifold) is defective. Leaking coolant into engine. This is the second 1998 Bonneville V-6 we've had this happen with. The first one the engine had to be completely replaced, since it was burning coolant in the engine and into the surrounding air. This Bonneville is currently being looked at and will need the intake manifold replaced, possible the entire engine as well. Pontiac issued technical sales bulletin 01-06-01-007 in July 2001 knowing they had this problem. They should recall this badly designed engine that can cause engine lockup and coolant smog release into the atmosphere.

- Hookstown, PA, USA

problem #4

Apr 052002


  • Automatic transmission
  • miles


While driving 10-15 mph, engine was hesitating. Consumer noticed a burning smell. Dealer determined that plastic intake manifold had a hole and was leaking fluid onto engine. Engine had to be replaced.

- Old Hickory, TN, USA

problem #3

Mar 132002


  • miles
While vehicle was in repair shop upper intake manifold exploded upon starting vehicle. Dealer and manufacturer were notified. Feel free to provide any further information.

- Omaha, NE, USA

problem #2

Mar 012002


  • miles
For the third time (18K miles, 79K miles, 129K miles) the intake manifold gasket has failed and allowed the engine to liquid lock by filling with coolant. First incident covered by warranty, second cost me $1,000 and now Pontiac is willing to split the cost of the third repair. I contend it is a design defect, and should cost me nothing.

- Stevensville, MI, USA

problem #1

Jan 172002


  • miles
A hole or defect in the plentum (part # 17113136) of the manifold allowed coolant to be sucked into the pistons causing major damage to the engine and starter. After discovering the defect, the part was taken to a GM dealership and it was confirmed that this part has been replaced over 13 times in the past year due to a hole occurring in the exact same place allowing coolant to be sucked into the engine. GM has not acknowledged any responsibility for this defective part and has refused to investigate further. The original dealership has been contacted and reluctantly acknowledged that they have replaced this part over 20 times in the past year.

- Watkinsville, GA, USA

Not what you are looking for?