Rule out the usual hiding places first. If the piece really is gone, check the set piece by piece
and leave with the element ID LEGO asks for, or a link to buy the part.
249 pieces in 121 part and color combinations, plus 2 minifigures.
LEGO counts 258 pieces. This inventory comes from a separate parts catalog and lists 257, including the 8 parts inside the minifigures; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
Before you call it missing
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Plate 2 x 4Black ×1Dark Blue ×2Black is yellower and darker than Dark Blue.
Plate 1 x 4Sand BluePart 3710Element 6111685 or 4169412×1
Plate 2 x 4Sand BluePart 3020Element 6248957 or 6052827×1
Tile 2 x 2 with Alpha Team Arctic Lightning Logo PrintSand BluePart 3068bpr0115Element 4225429×1
Windscreen 10 x 4 x 2 Curved with Bubble Cutout and Single Hinge FingerSand BluePart 47843Element 4254938×1
Trans-Medium Blue
9 pieces
Dish 2 x 2 Inverted [Radar]Trans-Medium BluePart 4740Element 4216334×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-Medium BluePart 2654Element 6001231 or 4278407×1
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]Trans-Medium BluePart 41669Element 6174477 or 4163578×6
Blue
8 pieces
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×6
Tile Special 1 x 2 Grille with Bottom GrooveBluePart 2412bElement 241223×2
Trans-Orange
4 pieces
Antenna 1 x 4 with Rounded TopTrans-OrangePart 3957aElement 4221167×2
Antenna 8H WhipTrans-OrangePart 2569Element 6288215 or 62622021 spare in the box×2
Trans-Clear
2 pieces
Equipment Crystal Ball Globe 2 x 2 x 2Trans-ClearPart 30106Element 6507889 or 6274736×1
Windscreen 9 x 3 x 1 2/3 Bubble Canopy with Red Square and Verniers PrintTrans-ClearPart 47844pr0002Element 4224283×1
Tan
1 piece
Hinge Brick 1 x 2 Top Plate ThinTanPart 3938Element 4519979 or 4124464×1
Trans-Dark Blue
1 piece
Plate Round 1 x 1 with Solid StudTrans-Dark BluePart 6141Element 6514055 or 62402141 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 4745-1[No Color/Any Color]Part 50191Element 4226573×1
Minifigures
2 figures
Ogel Minion with Bubble HelmetMinifigure, checked as a whole figure×1
Dash (Alpha Team)Minifigure, checked as a whole figure×1
Tick each piece as you find it, or mark it missing.
When a piece really is missing
Ask LEGO
LEGO takes requests for pieces missing from a new set through its customer service site. The form asks for
the set number and each piece's element ID, the number printed beside the piece in the parts list at the back
of the instructions. This checker lists both.
Mark a piece missing and your list links it to an eBay search for that part, which also covers pieces from
older or second-hand sets.
Keep a record
Copy or download your missing list (the CSV opens in any spreadsheet), or print the whole checklist and tick
pieces off on paper. Your marks stay in this browser, so you can check a big set over several sittings.