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 (1.29 meters including antennae), 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: Card Trader