Exhaust manifold developed 1-inch crack at main stem. Very loud noise when engine was running. I was told by dealer that a new manifold would cost $1000 for parts & labor. Luckily, I was able to find a used manifold and was only charged $300 to have it installed with a new gasket. I did not use this vehicle off-road and I can only assume that the wrong metal was used to design this manifold.

- Edinburg, PA, USA

Exhaust system leaking, dealer replaced muffler and exhaust manifold. Nlm

- West Babylon, NY, USA

I understand this problem has been going on for years..please see what you can do..this is a safety concern...carbon minoxide entering the vehicle due to a leak...thanks.

- Powder Springs, GA, USA

This crack is pervasive with 91-97 Jeep. All dealership and private-label mechanics are aware of the issue. Jeep is aware of it because in several states (incl. Ca) they increased the warratny to 80,000 miles for the exhaust, and beginning with 97 Jeep models, began using better quality materials for the exhaust. The problem is fracture cracks caused by uneven contraction/expansion due to heat/cold. The process is uneven because the metal used for the exhaust is not the appropriate quality. I believe this is an inherent defect and thus is a breach of Jeep's implied warranty of merchatability for Jeep. Consequently, I'm asking NHTSA's assistance in forcing Jeep to recall these vehicles. The repairs cost about $1,000 at the Jeep dealers.

- San Diego, CA, USA

Dating back to 2 years ago, I had a Jeep dealer check the exhaust system for a "fluttery" noise, which I thought sounded like an exhaust leak. It was checked and the catalytic converter was replaced under emissions warranty. Four months later I took the Jeep back due the problem never having been fixed. The dealer checked it out and tightened the exhaust clamps. This made no difference, but I was told everything is normal and took the fluttery noise as the "normal" engine/exhaust noise Jeep makes. Recently I took my Jeep to have various fluid leaks repaired ($500 worth) at my cost, at which time the dealer notified me that my exhaust manifold is cracked and would cost $1,000 (est.) to repair. I was told that no warranty would cover it and since I had close to 90,000 miles on the vehicle I didn't have options to have Jeep take care of the problem. The noise I have been hearing all along has been a cracked manifold, so the problem first manifested itself when my vehicle had 52,000 miles. This just does not seem what one should expect from a vehicle at 52,000 miles. I am looking to find out if there have been many other similar problems and what my recourse options are. Thanks for your help!

- Urbandale, IA, USA

No summary listed for above vehicle.

- Montague, NJ, USA

Case and all internal parts; seals and gaskets are covered have a added care service contract 7/100. Under transmission it is clearly written.

- Milwaukee, WI, USA

My exhaust manifold has defective welds causing a very noticeable exhaust leak in engine compartment. Took to independent muffler shop they inforrmed me tthis was a very common problem with the 4.0L Jeep.manifold needs to be replaced.also power windows on both front doors quit working and sometimes right rear window doesn"T work. Transmission: Sometimes it will go hard in reverse jerking the whole vehicle. Sometimes when you put it in drive it will jerk suddenly making the engine quit or go evvven with your foot on the brake.I use this vehicle for family outings and I'm concern with this problems. Grand Cherokee are very pricey when new and I feel that this Jeep has not impressed me any with the workmanship or quality. The designer for this vehicle must have been the same one for Yugo. Thank you P.S. the motor itself is too noisy for this luxurious SUV, should be in a mack truck.

- Owensboro, KY, USA