I did a little more research on the Executive Mark 3s (7161 and 7162):
7161 & 7162 are two IÉ Mark 3 coaches built as 72-seat Standard Opens by BREL in 1987 and were converted to Executive carriages in 1992. They are notable as the two Mark 3 Executive coaches and for their "Wine Red" colour instead of the typical standard orange. In January 2003, 7161 was repainted orange, and 7162 received the same treatment a month later in February. I believe during 7162's repaint, the other half of the carriage, which was initially an open area, had more seats fitted to it.
7161's last outing was during a Wexford Opera special from Dublin Connolly to Wexford on the 31st of May 2007. The consist went as follows: 073 + 7120 + 7401 + 7157 + 7156 + 7162 + 7161 + 7603.
7162 was later marshalled as a standard in the International Mark 3 set for about a year before the rake was withdrawn (April 2008); its last recorded outing was on the 15th of April 2008. The consist went as follows: 7162 + 7119 + 7109 + 7128 + 7401 + 7606.
I can't find any info of when they were refurbished and reupholstered, although it's known that the first one took place in either 1995 or 1996. I've also noticed that Restaurant car No. 7401 would often be paired with the Executive carriages.