Transmission fluid diluted with anti -freeze from faulty radiator /tranny cooler Nissan needs to address this problem it is a stall issue, a safety issue, its an expensive repair, and not uncommon.

- Bowlus, MN, USA

Both exhaust manifolds have developed cracks and leaks. Nissan refused to repair if not within 70K warranty.

- Madison, AL, USA

The contact owns a 2004 Nissan Titan. The contacted that while driving 50 mph, he noticed that the exhaust manifold was cracked and exhaust fumes were leaking. The contact was able to drive the vehicle to the dealer for diagnosis where it was advised that the exhaust headers needed to be replaced. The vehicle was not repaired and the manufacturer was not notified. The approximate failure mileage was 43,000.

- Lake Havasu, AZ, USA

Exhaust manifold is cracked and leaks fumes into cab.

- Brooksville, FL, USA

The vehicle displayed intermittent chemical type odor through HVAC system, 3 dealerships unable/unwilling to confirm, or seek direction from corporate as to method for resolution at my suggestion/request. I waited one year to allow for vehicle to "off-gas" interior odors from materials used in manufacture, had to insist that dealer staff document the concern which is yet unresolved and denied assistance from Consumer Affairs department to satisfy health and safety concerns. Incurred significant additional expenses to alleviate issue such as in cabin air filter and purchase of ionizing unit; plus missed workdays, transportation, fuel and service and diagnostic fees at dealerships.

- Flint, MI, USA

The contact owns a 2004 Nissan Titan. The contact stated that exhaust fumes emitted into the vehicle. The vehicle was taken to the dealer, who diagnosed that the exhaust manifold was cracked and needed to be replaced. The vehicle was repaired, but the failure continued. The manufacturer was not made aware of the failure. The vehicle was not repaired a second time. The failure mileage was 79,000 and the current mileage was 84,972.

- Ramsey , MN, USA

Just had both manifolds replaced under Nissan warranty. As I was driving away from the dealership I heard a loud pop turning right from the rear of the truck. Turned around back into the dealerships parking lot I heard another pop? the service tech drove it around their service area and said my rear differential was going out. Nissan has known this has been an issue for years especially in the early trucks years but refuses to fix it under a recall. This is a $3500 fix which the consumer has to pay and Nissan profits from a poorly designed component. There needs to be a recall on all Nissan Titans from '04 - '07.

- San Diego, CA, USA

Exhaust manifold on driver side cracked and leaking exhaust fumes into cabin of vehicle.

- New Cumberland , PA, USA

Exactly like the frequent problem with the 2005 Nissan pathfinder and xterra, the radiator failed causing coolant to mix with the transmission fluid.

- Apple Valley, MN, USA

The contact owns a 2004 Nissan Titan. The contact stated that the engine exhaust manifold was cracked due to defective material, and caused fumes to enter the vehicle. The vehicle was not repaired. The failure mileage was 180,307 and the current mileage was 180,400.

- Dobson, NC, USA

The contact owns a 2004 Nissan Titan. The contact stated when driving at various speeds he noticed that the vehicle would drive sluggishly and it was losing gas mileage. The vehicle was taken to an independent mechanic who advised him that his manifold fractured and needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and offered no assistance. The failure mileage was approximately 118,000.

- Knocksville, TN, USA

2004 Nissan Titan VIN [xxx] at 90K miles the exhaust manifolds cracked on my 2004 Nissan Titan. Nissan covers this under warranty until 80K miles for the exhaust system. The truck has had no modification and will not pass state emissions and gets horrible gas mileage due to this. Now at 104 K I have visited multiple dealers and they agree this is common issue with the Titan's and the crack will make a 5 year old truck not pass state emissions. To replace the exhaust manifold with stock parts is $1200; which frustrates me since this is a faulty design which causes the manifolds to move differently then the engine mounts allow the engine to. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Las Vegas, NV, USA

2004 Nissan Titan exhaust manifold cracked this is a emission issue.

- Va, VA, USA

Car into dealer for service. Found two cracked manifolds on both sides of the engine resulting in excessive noise and exhaust gases to be released into the cab. Both sides need full replacement at nearly $1,200 per side. This is ridiculous on a vehicle with only 70K miles on the clock.

- Huron, OH, USA

While traveling to go on a 13 hour drive, all of our engine lights came on and the truck became sluggish. We had truck towed and got a call from dealership saying what happen was muffler/exhaust unit fell off during travel and the unit remaining got so hot it burned out entire part of truck including, ECU, rear right harness, and 3 other things. Cost to fix over $3,000. After paying hefty bill shop manager said this was the 5th Titan in our small town he had same issue with and that he agrees this is the worst place for a unit on a truck and manufacturer should of put other location. I then filed a complaint with Nissan Consumer Affairs. They acted like they cared and then 3 weeks later they denied helping me at all saying it was out of warranty. I did research on line and lots of people are having same issue. This is a huge safety concern and I think needs to be recalled and I need to be reimbursed for my repairs. I find it odd that the exhaust manifold also cracked on the truck on the right and left side and Nissan covers that until 80,000 miles.

- Rapid City, SD, USA

Ticking noise discovered when starting the truck. Sounds seems to come from lower engine compartment or from front wheel-wells. Suspected a leaking exhaust pipe. Took truck to Nissan dealership and was informed the exhaust manifolds (left and right) were both cracked. Estimated cost was $2100. Advised by Nissan technician to "just leave it alone" as the only result of this problem was the ticking noise and a little worse mileage than usual. Over the last year, several instances of engine fumes causing passengers to roll windows down. Suspect the fumes are coming from the manifolds since no other exhaust leaks have been found.

- Owens Cross Roads , AL, USA

The contact owns a 2004 Nissan Titan. The contact stated that exhaust fumes were emitted into the vehicle. The vehicle was taken to a dealer who diagnosed that the exhaust manifold was crack and it needed to be replaced. The manufacturer was not made aware of the failure. The VIN was not available. The vehicle was not repaired. The failure and current mileage was 60,000.

- Burlington , WA, USA

The contact owns a 2004 Nissan Titan. The contact stated the exhaust manifold was leaking. The contact took the vehicle to a local dealer who stated the exhaust manifold leak was a common problem with his year, make, and model. The dealer stated there were no recalls related to the exhaust manifold. The contact stated if the exhaust manifold had a larger crack in the exhaust it could have caused a fire. The failure mileage was 108,000.

- Forest , OH, USA

The contact owns a 2004 Nissan Titan. The contact stated that there was a ticking noise from the header and engine area. The vehicle was taken to an authorized dealer several times while under warranty and the contact was told that there was nothing wrong. The contact stated that now the dealer was stating that the headers and manifold were defective. The failure caused the vehicle to lose oil pressure and the headers on both sides needed to be replaced. The failure mileage was 30,000 and the current mileage was 100,000.

- Scottsdale, AZ, USA

2004 Nissan Titan crew cab xe 4X4. Radiator has failed, rear differential leaked, rear differential axle seals failed, front differential failed twice"C-clip", transmission leaked three times, front brake rotors replaced, driver side power window failed, something to do with the shifter fell out from underneath the dash, rear shackles for leaf springs are failing, numerous safety recalls and even more information bulletins that Nissan will not repair.

- Springtown, TX, USA