R4-I9 was an R4agromech droid painted a dark blue. It was owned by the Galactic Empire. R4 patrolled the halls of the first Death Star during 0 BBY, where it performed maintenance tasks. Years later, a rebel attack onboard the second Death Star, left corridors in flames and R4-I9 immobilized. R4's ally R2-Q5 was forced to download an important message for the Emperor from R4's memory banks and deliver it personally.[1]
An identical droid, R4-D6, can be seen in the Yavin hangar, in the distant background as Luke Skywalker confronts Han Solo about his decision to leave the rebels without his assistance.
R4-I9 was made as an action figure by Hasbro in 2003, however, it was black instead of dark blue. In addition to this, an R4-D6 figure was made available from Hasbro in 2008 as a build-a-droid figure, where individual parts were packed in with various figures which, when assembled, would create the droid. This time around, the droid was properly painted blue.