The R5 unit was a model of R-series astromech droid. Cut-price versions of superior R2 units, they were low cost, but plagued with malfunctions, prone to defects and bad attitudes. Standing 0.97 meters in height they generally had shorter, cone-shaped heads and were equipped with repair arms. R5-D4 was one of the last units produced in the R5 line.
- LEGO Star Wars: The Freemaker Adventures – "The Maker of Zoh"
- LEGO Star Wars: Droid Tales Episodes I-III (Appears in flashback(s))
- Star Wars Character Encyclopedia: Updated and Expanded
- Star Wars Builders: Droids (First identified as R5 unit)
- Star Wars: The Visual Encyclopedia
- Star Wars: Alien Archive - Species Guide