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.
826 pieces in 247 part and color combinations, plus 5 minifigures.
LEGO counts 840 pieces. This inventory comes from a separate parts catalog and lists 854, including the 28 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 1 x 2Red ×1Trans-Red ×3Trans-Red is see-through: hold the piece up to a light.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Black ×4Dark Blue ×16Black is yellower and darker than Dark Blue.
Plate 1 x 4Black ×1Dark Blue ×9Black is yellower and darker than Dark Blue.
Brick 2 x 2Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 2 x 6Black ×3Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Panel 1 x 4 x 3 [Hollow Studs]Trans-Light BluePart 4215bElement 3000742×2
Rock 1 x 1 Jewel / Gem 24 FacetTrans-Light BluePart 30153Element 6513972 or 6247792×2
Windscreen 12 x 6 x 6 CurvedTrans-Light BluePart 41881Element 4499775×2
White
11 pieces
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallWhitePart 53451Element 6270106 or 45683871 spare in the box×8
Brick Sloped 45° 2 x 2 with Green Radar, Green/Red Buttons and Disk Slot PrintWhitePart 3039pr0002Element 4195659×1
Dome Hemisphere 3 x 3 Ball Turret with Marbled Red PatternWhitePart 44359pat0002Element 4502178×2
Trans-Red
9 pieces
Plate 1 x 2Trans-RedPart 3023Element 6514003 or 6240212Also in Red×3
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084503 spares in the box×6
Trans-Green
8 pieces
Plant, Sea GrassTrans-GreenPart 30093Element 4256382 or 4247326×4
Plate Round 1 x 1 with Solid StudTrans-GreenPart 6141Element 6514057 or 62402213 spares in the box×4
Blue
7 pieces
Plate 2 x 10BluePart 3832Element 383223×1
Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring]BluePart 4081bElement 6281991 or 4632567×1
Seat / Chair 2 x 2BluePart 4079×1
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×4
Chrome Gold
4 pieces
Money / Coin with "10" Sans-serif TypeChrome GoldPart 57503×1
Money / Coin with "20" Sans-serif TypeChrome GoldPart 57504×1
Money / Coin with "30" Sans-serif TypeChrome GoldPart 57505×1
Money / Coin with "40" Sans-serif TypeChrome GoldPart 57506×1
Dark Red
4 pieces
Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening]Dark RedPart 32064b×4
Trans-Clear
4 pieces
Brick Round 2 x 2 x 1 2/3 Dome Top, Blocked Open StudTrans-ClearPart 30151aElement 4113949×4
Trans-Yellow
4 pieces
Plate Round 1 x 1 with Solid StudTrans-YellowPart 6141Element 6514056 or 62402161 spare in the box×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-YellowPart 2654Element 6581773 or 6171728×2
Green
3 pieces
Cone 1 x 1 [No Top Groove]GreenPart 4589Element 4188820 or 458928×3
Trans-Brown
2 pieces
Windscreen 10 x 6 x 2 Curved with Blue Scales PrintTrans-BrownPart 45705pr0001Element 4501267×1
Windscreen 6 x 6 x 3 Canopy Half Sphere with Dual 2 FingersTrans-BrownPart 50747Element 4502248 or 4261631×1
Bright Light Orange
1 piece
Animal, CrabBright Light OrangePart 33121Element 6253362 or 6005772×1
Reddish Brown
1 piece
Box / Crate with Handholds 3 x 4 x 1 2/3Reddish BrownPart 30150Element 4211185×1
[No Color/Any Color]
1 piece
Sticker Sheet for Sets 7774-1, 7775-1[No Color/Any Color]Part 58840Element 4501861×1
Minifigures
5 figures
Skeleton, Evil Face, Aquaraiders HelmetMinifigure, checked as a whole figure×1
Aquaraider Diver 4 with Dark Bluish Gray HatMinifigure, checked as a whole figure×1
Aquaraider Diver 3Minifigure, checked as a whole figure×1
Aquaraider Diver 2Minifigure, checked as a whole figure×1
Aquaraider Diver 1Minifigure, 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.