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.
214 pieces in 83 part and color combinations, plus 2 minifigures.
LEGO counts 223 pieces. This inventory comes from a separate parts catalog and lists 224, including the 10 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.
Cone 1 x 1 [No Top Groove]Trans-Dark BluePart 4589Element 618843×2
Trans-Medium Blue
2 pieces
Rock 1 x 1 Crystal 5 PointTrans-Medium BluePart 30385Element 6254245 or 4243703×2
White
2 pieces
Lever Small Base with Black LeverWhitePart 298c02Element 737371 spare in the box×2
Blue
1 piece
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×1
Tan
1 piece
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×1
Trans-Brown
1 piece
Windscreen 6 x 4 x 2 Wedge CurvedTrans-BrownPart 41883Element 4286384 or 4163015×1
Minifigures
2 figures
Aquaraider Diver 2Minifigure, checked as a whole figure×1
Aquaraider Diver 5 with Black HatMinifigure, 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.