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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.
Checking
157 pieces in 32 part and color combinations.
LEGO counts 156 pieces. This inventory comes from a separate parts catalog and lists 157; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
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 (9087) and each piece's element ID, both listed above.
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Duplo Ball Tube 45° Turn
×9
Duplo Ball Tube exit with round doorway 2 x 6 x 5
×4
Duplo Brick 2 x 2
×19
Duplo Brick 2 x 2 with Eye with White Spot Print, on Two Sides - Type 1
×2
Duplo Brick 2 x 2 x 2 with Number 2 with Polka Dots Print
×1
Duplo Brick 2 x 4
×4
Duplo Brick 2 x 8
×1
Duplo Figure, Early Child, Hair Swept Left Dark Orange, Red Legs, Red Collar and Blue Argyle Print
×2
Ball, Hard Plastic, 51mm (approx. 6 studs diameter)
×4
Duplo Ball Tube 45° Turn
×7
Duplo Ball Tube Exit Door with Polka Dots Print
×1
Duplo Brick 2 x 2
×19
Duplo Brick 2 x 2 x 2 with Number 3 with Polka Dots Print
×1
Duplo Brick 2 x 3 x 2 with Curve
×2
Duplo Brick 2 x 4
×4
Duplo Tricycle with 4 studs
×2
Duplo Ball Tube 45° Turn
×7
Duplo Ball Tube Door with Juggling Clown Print
×2
Duplo Ball Tube Exit Door with King Print
×1
Duplo Baseplate 8 x 12
×2
Duplo Brick 2 x 2
×19
Duplo Brick 2 x 3 with Curved Top
×2
Duplo Brick 2 x 4
×4
Duplo Figure, Early Child, with Pigtails Brown, White Legs, White, Red and Yellow Flowers
×1
Duplo Ball Tube 45° Turn
×9
Duplo Ball Tube Exit Door with Wizard Print
×1
Duplo Ball Tube exit with round doorway 2 x 6 x 5
×1
Duplo Brick 2 x 2
×19
Duplo Brick 2 x 2 x 2 with '1' with Polka Dots Print
×1
Duplo Brick 2 x 4
×4
Duplo Figure, Early Child, Hair Swept Left Brown, Blue Legs, White Stripes and Blue Overalls with One Strap Print
×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.
