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


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
31,600 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.

2002 Pontiac Montana exhaust system problems

exhaust system problem

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2002 Pontiac Montana Owner Comments

problem #5

Mar 082007

Montana 6-cyl

  • Automatic transmission
  • 65,000 miles


- the contact stated she took the 2002 Pontiac Montana to a mechanic and they noticed that the intake manifold gasket was damaged. The mechanic informed the contact that coolant was leaking onto the exterior of the engine and the oil was leaking into the coolant reservoir. The mechanic informed the contact this was due to a flaw with the intake manifold gasket. The intake manifold gasket was replaced and the coolant system was flushed. The contact has not experienced the problem since the repair. The vehicle currently had 65000 miles.

- Dayton, OH, USA

problem #4

May 152005

Montana 6-cyl

  • Automatic transmission
  • 38,000 miles
Intake manifold gaskets failing after the warranty period, Pontiac Montana 2002, with a cost of $700 plus. Information was sent to all G.M dealers of this defect, with no recall to repair. Class action lawsuit was started in Canada for this defect with many failures of this gasket or manifold itself. What can I do" this has not failed yet but will, as it is leaking now. What recourse do I have "

- Waupaca, WI, USA

problem #3

May 012005


  • miles
2002 Montana gasket was faulty and had to be replaced. Transmission gave out on the minivan. Have also had other smaller repairs, which consumer believe were due to manufacturer error.

- Preston, IA, USA

problem #2

Apr 222005


  • Automatic transmission
  • miles
Contact states: 2002 Pontiac Montana out of warranty. Contact took the vehicle in for routine mainteance, oil change, etc. The service department informed contact that the intake manifold was leaking. The service department contacted General Motors, and they agreed to pay $200 for parts. Contact felt that General Motors should be responsible for entire bill. Labor cost was $460.10.

- Geneva, NY, USA

problem #1

Feb 122004


  • Automatic transmission
  • 55,000 miles
Radiator needed to be refilled with coolant every week. Vehicle was taken to dealership, and mechanic determined the intake manifold cracked.

- Monclova, OH, USA

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