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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 (71402-5) and each piece's element ID, both listed above.
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Brick 1 x 2
×1
Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs
×2
Brick Sloped 30° 1 x 2 x 2/3 with Black Eyes, Bright Pink Pupils Print
×1
Brick Special 1 x 1 with Scroll with Open Stud
×1
Brick Special 1 x 1 with Studs on 2 Adjacent Sides
×4
Plate 1 x 2
×1
Plate Round 1 x 1 with Open Stud
1 spare in the box
×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)
×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
Tile 2 x 2 with Groove
×1
Tile 2 x 2 with Scaredy Rat and Barcode Print (Sticker)
×1
Brick Special 1 x 2 with Masonry Brick Profile
×2
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)
×1
Plate Special 2 x 2 with Groove and Center Stud (Jumper)
×1
Tile 1 x 1 with Groove
1 spare in the box
×2
Brick Curved 1 x 1 x 2/3 Double Curved Top, No Studs
×1
Feet, 2 x 2 x 2/3 with 4 Feet, 4 Studs on Top
×1
Animal Body Part, Horn (Cattle)
1 spare in the box
×1
Plate Round Corners 4 x 4 x 2/3 Circle with Reduced Knobs
×1
Wave / Flame Small with Pin
×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.
