The M35 series (2001 to 2007) looks very different from the previous C34 models and is derived from the Skyline/G35 sedan (V35 platform). As per the Skyline the engine was changed from the RB series I6 to the VQ series V6.
Nissan ceased production of the Stagea in early June 2007, Nissan Japan stated that it would continue to sell the remaining stock of the vehicle but that production of the vehicle had ended. The model segment served by this vehicle was replaced by the Nissan Skyline Crossover.
Source: Wikipedia (original)