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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.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
LEGO's request form asks for the set number (71402-2) and each piece's element ID, both listed above.
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Brick Curved 1 x 2 x 1 No Studs with 2 Small Black Dots Print
×1
Brick Sloped 30° 1 x 2 x 2/3
×2
Brick Special 1 x 1 with Headlight
×2
Plate Special 1 x 2 [Side Handle Closed Ends]
×1
Plate Special 1 x 2 with Clip Horizontal on Side
×1
Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top]
×2
Plate 1 x 2
×1
Plate Special 1 x 2 with Clips Horizontal [Open O Clips]
×1
Technic Pin with Friction Ridges Lengthwise with No Center Slots
1 spare in the box
×2
Brick Special 1 x 2 with 2 Studs on 1 Side with, White Eyes, Red Pupils Print
×1
Plate 1 x 2
×1
Plate Special 2 x 2 with Groove and Center Stud (Jumper)
×1
Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud]
×1
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)
×1
Tile 2 x 2 Curved, Macaroni with Wooden Board, Nails Print
×2
Tile Round 1 x 1
1 spare in the box
×2
Tile Round 1 x 1 Quarter
1 spare in the box
×2
Technic Brick 1 x 2 [1 Pin Hole]
×2
Plate Special Round 2 x 2 with Center Stud (Jumper Plate)
×1
Equipment Winder Key [Toy]
1 spare in the box
×1
Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs
×1
Tile 2 x 2 with Mechakoopa and Barcode Print (Sticker)
×1
Tick each piece as you find it, or mark it missing.
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.
Request a replacement from LEGOMark 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.
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.
