Nissan Diesel U31RCN

日产柴油机U31RCN (富士重工)
The Fuji-bodied Nissan Diesel and Hino buses represented the roots and early days of Trans Island Bus Services (TIBS). Following S31RCN's fleet retirement, the U31RCN became the last model to be in revenue service, and the only model to be carried over to SMRT's era. They were originally purchased under Singapore Shuttle Bus's name. Of the 50 buses, 26 of them were originally fitted with air-conditioning.

Powered by the PE6H engine and fitted with ZF 4HP500 automatic transmission, these buses have features that are not seen in subsequent European models (and even the later-generation of Hino buses were bodied in Australia rather than Japan!). They were the last to have the heavy rear sliding door and bench seats with full cushion. As with other buses, all non-air-conditioned U31RCN have undergone conversion, with very little change made to its interior. It was also the first bus to feature with Lawo's dot-matrix electronic destination sign (EDS), which was to be a supplier for many years to come.

Due to the general public's poor perception of old buses, they have been largely confined to suburban routes such as 178 and 853. This is despite that they in fact perform better than the Scanias and perhaps even the DAFs. These buses' lifespan is estimated to be no more than a year left.