One problem related to radiator hose has been reported for the 2007 Nissan Titan. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 Nissan Titan based on all problems reported for the 2007 Titan.
Transmission cooling lines broke and sprayed transmission fluid all over. Engine would barely transfer power to transmission causing vehicle to barely be driveable. After being towed to dealership, not only the transmission cooling lines needed to be replaced but also the radiator hoses and the high pressure power steering line. Neither of those to my knowledge needed to be fixed when brought in but was told they were cracked or slowly leaking and needed to be replaced. After 2 weeks and 1500 dollars later I finally have my truck back.