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.
290 pieces in 153 part and color combinations, plus 3 minifigures.
LEGO counts 304 pieces. This inventory comes from a separate parts catalog and lists 305, including the 15 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.
Tile Round 1 x 1RedPart 98138Element 6284574 or 60634451 spare in the box×4
Yellow
9 pieces
Brick Round 1 x 1 Open StudYellowPart 3062bElement 306844 or 306224×1
Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 SideYellowPart 22885Element 6313592×3
Cone 1 x 1 [Top Groove]YellowPart 59900Element 4525464×3
Plate 1 x 4YellowPart 3710Element 371024×1
Propeller with PinYellowPart 54568Element 62654971 spare in the box×1
Dark Bluish Gray
8 pieces
Brick Special 1 x 4 with 4 Studs on One SideDark Bluish GrayPart 30414Element 4210725×2
Plate Special 1 x 2 with LadderDark Bluish GrayPart 4175Element 6285244 or 6179567×1
Tile 1 x 4 with GrooveDark Bluish GrayPart 2431Element 4211053×1
Tile 2 x 2 with GrooveDark Bluish GrayPart 3068bElement 4211055×2
Tile Special 1 x 2 Grille with Bottom GrooveDark Bluish GrayPart 2412bElement 4210631×2
Trans-Clear
6 pieces
Sail, Triangular, 3 Corner Holes, Dark Turquoise and Yellowish-Green Wave PrintTrans-ClearPart 1602a×1
Sail, Triangular, Small, 2 Corner Holes, Dark Turquoise and Yellowish-Green Panels, Coral Stars PrintTrans-ClearPart 1602b×1
Tile Special Round 1 x 1 with Hollow BarTrans-ClearPart 20482Element 6507895 or 61868671 spare in the box×4
Lavender
4 pieces
Brick 1 x 2LavenderPart 3004Element 6099352 or 6015118×1
Brick Curved 1 x 2 x 1 No StudsLavenderPart 37352Element 6377009×3
Lime
3 pieces
Brick Round 1 x 1 Open StudLimePart 3062bElement 4212454×1
Plant, Flower, Plate Round 1 x 1 with 5 PetalsLimePart 24866Element 62096921 spare in the box×1
Plant, Leaves 6 x 5 Swordleaf with Clip [Thick Open O Clip]LimePart 10884Element 6313098 or 6023832×1
Trans-Brown
3 pieces
Brick Curved 6 x 1Trans-BrownPart 42022Element 6346294 or 4520018×2
Windscreen 6 x 6 x 1 2/3Trans-BrownPart 65632Element 6510195 or 6287674×1
Yellowish Green
3 pieces
Aircraft Fuselage Curved Forward 8 x 12 x 2 BottomYellowish GreenPart 67243Element 6394279×1
Brick Curved Inverted 8 x 8 x 2 DoubleYellowish GreenPart 54091Element 6394280×2
Dark Brown
2 pieces
Boat, Mast 2 x 2 x 20 with Holes - Side Aligned x shape Axle Hole, + OrientationDark BrownPart 48002aElement 6523484 or 6366050×1
Technic Axle and Pin Connector Angled #1Dark BrownPart 32013Element 6332586 or 6167932×1
Medium Azure
2 pieces
Plate Round 1 x 1 with Solid StudMedium AzurePart 6141Element 61029861 spare in the box×2
Medium Nougat
2 pieces
Brick 1 x 2Medium NougatPart 3004Element 4569382×1
Tile 2 x 4 with GrooveMedium NougatPart 87079Element 6218359×1
Trans-Yellow
2 pieces
Plate Round 1 x 1 with Solid StudTrans-YellowPart 6141Element 6514056 or 62402161 spare in the box×2
Blue
1 piece
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×1
Bright Light Blue
1 piece
Plate 2 x 6Bright Light BluePart 3795Element 6132422 or 6013812×1
Dark Pink
1 piece
Equipment Cup / Mug [Plain]Dark PinkPart 3899Element 4618670 or 4243575×1
Pearl Gold
1 piece
Zipline, 22L with 2 Connectors - FlexiblePearl GoldPart 27965Element 6559521 or 63683281 spare in the box×1
Trans-Green
1 piece
Plate Round 1 x 1 with Solid StudTrans-GreenPart 6141Element 6514057 or 62402211 spare in the box×1
Trans-Red
1 piece
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 41716-1[No Color/Any Color]Part 10100107Element 6400659×1
Minifigures
3 figures
Elijah - Wetsuit, Lifejacket, Coral CapMinifigure, checked as a whole figure×1
Stephanie - Wetsuit, Lifejacket, Coral CapMinifigure, checked as a whole figure×1
Capt. MaxineMinifigure, 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.