The contact owns a 2004 Nissan Titan. The contact stated that while driving at various speeds, the vehicle exhibited a loud noise. The vehicle was taken to a dealer and they advised him that the driver side manifold was fractured and needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and they offered to pay for labor costs. The failure mileage was approximately 80,000. Updated 11/16/2011

- Idyllwild, CA, USA

The contact owns a 2004 Nissan Titan. The contact stated that the exhaust manifold was leaking and causing the smell of fumes to enter the vehicle. As a result, the odor was making it very difficult to drive the vehicle. The vehicle was taken to an authorized dealer where the contact was informed that the vehicle needed a new exhaust manifold. The vehicle was not repaired. The failure mileage was 104,000. The VIN was unavailable.

- Clancy, MT, USA

The contact owns a 2004 Nissan Titan. When starting the vehicle, the contact heard a noise coming from the engine. The vehicle was taken to the dealer who stated that the exhaust manifold was cracked on both sides. The manufacturer was not notified nor was the vehicle repaired. The approximate failure mileage was 80,000.

- Spanish Fork, UT, USA

The contact owns a 2004 Nissan Titan. The contact stated that fumes emitted into the vehicle. The vehicle was taken to a dealer who diagnosed that there were two cracked manifolds which needed to be replaced. The manufacturer was made aware of the failure and filed a report stating that the regional consumer specialist would contact her at a later date. The vehicle was not repaired. The failure mileage was 85,000 and the current mileage was 100,000.

- Amawalk , NY, USA

The contact owns a 2004 Nissan Titan. While driving approximately 30 mph, the contact heard a clicking noise and smelled exhaust fumes inside of the vehicle. The vehicle was taken to an independent mechanic where they informed the contact that the exhaust manifold was cracked. The vehicle was not repaired. The exhaust fumes progressively became worse over a period of time. The manufacturer was not made aware of the problem. The failure mileage was approximately 50,000. The VIN was unavailable.

- Leesburg, GA, USA

2004 Titan. Connection failed at the flanges welded to the exhaust pipe and the muffler extension at the right rear wheel area. The exhaust pipe and the muffler extension are in good condition. The failure was confined to the flange attachments. Failure resulted in hot air/gases melting a critical wire harness that is attached along the frame beam to carry electrics to the rear of vehicle. The right rear wheel speed sensor was damaged. The wires shorted, causing the failure of underhood electrical components. Immediate consequence was the engine shut down with loss of power steering and power brakes and all other components relying on power from the alternator. The experienced driver was able to coast the vehicle to a stop along a busy interstate highway. Long range consequences were the replacement of the Titan's wire bundles and electronic components at considerable cost. Nissan has not, to date, explained why this simple connection failed, why a wire harness was located close to this heat source, why the wire harness was not protected against heat damage, why the electrical damage was not limited by a fuse, why Titan owners were not notified of this potential catastrophic problem and why Nissan dealers did not inspect and notify Titan owners of this issue during other routine maintenance at their facilities.

- Pontoon Beach, IL, USA

The contact owns a 2004 Nissan Titan. The contact stated that the catalytic converter came apart and was sucked up in the intake of the engine while driving 5 mph. The vehicle was taken to the dealer who informed him that the engine would need replacing. The vehicle was repaired by an independent mechanic. The manufacturer was contacted who offered no assistance. The failure mileage was 175,000.

- Addis, LA, USA

2004 Nissan Titan - know issue with exhaust manifolds that leak. This leak or crack in the exhaust manifold causes the engine computer to run full rich all the time. This creates an unsafe condition inside the cab of the vehicle with noxious exhaust fumes and health concerns. Not to mention the fuel mileage is almost cut in half as I have calculated. My truck will be on it's third set of manifolds. The first two sets of replacements were covered under the federal emissions warrant up to 80K miles but that has expired at this point. Nissan is aware of this issue and from information I have gathered the have updated the design of the manifolds. I might add that the catalytic converters are directly connected to these manifolds. I cannot stress enough the safety concerns with exhaust fumes constantly entering inside this cab - I drive to work with headaches and nausea and burning eyes every day!

- Chelmsford , MA, USA

Exhaust manifolds in Nissan Titans around the year of '04 are cracking when the shouldn't be with just mild wear and tear on the car. Dealers are saying its not a dangerous problem so they cant recall it but with a cracked exhaust manifold co can and often does leak into the cabin.

- Evergreen, CO, USA

The contact owns a 2004 Nissan Titan. While the vehicle was being inspected by the dealer he was informed that the vehicle had a cracked exhaust manifold. The contact called the manufacturer and was advised that the repair was not under warranty and there were no recalls. The vehicle was not repaired. The failure mileage was 69,000 and the current mileage was 69,323.

- Cape Girardeau, MO, USA

The contact owns a 2004 Nissan Titan. The contact started the ignition and heard a loud ticking noise on the outside of the vehicle. The failure would occur when the vehicle was in motion and during the engine initial start-up. The vehicle was taken to an authorized dealer for diagnosis and they informed that the exhaust manifold exhibited a severe crack. The vehicle was not repaired. The failure mileage was approximately 66,000. The VIN was unavailable.

- St. Port Lucie , FL, USA

Cracked exhaust manifolds.

- Wantagh, NY, USA

Exhaust manifold crack. Exhaust fumes smelled in the cabin.

- Madison, WI, USA

The contact owns a 2004 Nissan Titan. The contact stated that the exhaust manifold cracked which caused the exhaust fumes to escape into the vehicle. The vehicle was taken to an authorized dealer who stated that if the manifold was replaced but the catalytic converter was not, the manifold would crack again. The catalytic converter was replaced. The VIN was unavailable. The failure mileage was approximately 120,000 and the current mileage was approximately 121,000.

- Everett, WA, USA

2004 Nissan Titan exhaust manifold cracked. Both sides, causing exhaust fumes into the cabin of the vehicle. Nissan refusing to settle the claim due to vehicle being over warranty mileage of 8/80K. Step up and make this a recall for Nissan!!!

- Glens Falls , NY, USA

Exhaust manifolds cracked and leaking exhaust into passenger compartment.

- Anderson, SC, USA

Purchased a 2004 Nissan Titan in April 2010 with 82K on the engine. In May 2010, I brought the truck in for a recall. The vehicle had 82,528 miles on it. The dealer discovered that both exhaust manifolds were leaking and quoted my $1800 for the repair. I now smell a strong odor of exhaust fumes coming into the cab. The fumes cause nausea and headaches. I have contacted Nissan and they refuse to fix the problem. I have researched this topic online and found this to be a very common defect among 2004 thru 2007 Nissan Titans. There has yet to be a recall for this issue. I continually see people reporting this issue on internet forums. This is a known defective part. The leak is also hazardous to the environment. I have reported this issue to the epa as well.

- Sterling, CO, USA

I purchased my 2004 Nissan Titan in April 2010, I took the vehicle in for service on May 6, 2010 and was told my exhaust manifolds are leaking. The warranty is 8 yr/ 80K, I have 82K on my Titan. The exhaust fumes leak into the cab causing nausea and dizziness. This is a safety issue. The dealer won't replace them, because they are out of warranty. The replacement cost is $2000.

- Sterling, CO, USA

Exhaust manifold warps after about 80K miles, creating an exhaust leak. If it develops before the 80K mile emissions warranty, it will be covered. Most develop after the warranty. I own an '04 and an '05 Nissan Titan. The '05 exhaust leak was fixed at 78K miles with 1 new exhaust manifold and some crossover piping. The '04 started at 88K miles and the dealership has not helped with the problem with the exception of estimating $1300 to repair.

- Oklahoma City, OK, USA

Heard exhaust leak in engine at about 85,000 miles. Manifold leak was confirmed at 101,000 when brought in for a transmission issue. Not covered under warranty. Reviewed many technical forums where the exhaust manifold is being reported as cracked on countless Titans. This is a manufacturer's defect, and the cost should not be relayed to the consumer at a significant dollar amount.

- New Richmond, WI, USA