When considering a Nissan Titan, it's essential to be aware of certain years that may present reliability issues. Generally, the first generation of the Titan, produced from 2004 to 2015, tends to have more reported problems compared to later models. Specifically, the earlier years, such as 2004 to 2007, have been associated with issues like brake and exhaust manifold problems, as well as premature transmission failure. Additionally, some owners have reported concerns regarding interior build quality and electrical components in these earlier models. However, it's worth noting that Nissan made improvements over the years, and the later models, particularly those from 2016 onwards, tend to have fewer reported problems and offer better overall reliability. Conducting thorough research and inspecting any used vehicle carefully can help mitigate these risks.