Star Wars: Build Your Own R2-D2 4, published by De Agostini, represents the fourth installment of the Star Wars: Build Your Own R2-D2 series. This issue included the processor state indicator component for the constructible R2-D2, alongside articles titled "Filming R2-D2, Part 1", "3PO-series protocol droids, Part 2", and "CMOS: image sensors".