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LEGO Missing Piece Checker

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.

Minifigure Birthday Set

Checking

850791 Minifigure Birthday Set

23 pieces in 17 part and color combinations, plus 2 minifigures.

The piece count includes the 8 parts inside the set's minifigures, which this inventory lists separately. 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.

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Piece checklist

Reddish Brown 5 pieces

  • Hair Ponytail and Swept Sideways Fringe Reddish Brown Part 87990 Element 6093515 or 4636983 ×1
  • Plate Round 1 x 1 with Solid Stud Reddish Brown Part 6141 Element 4216581 ×4

White 5 pieces

  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×1
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) White Part 3794b ×1

[No Color/Any Color] 3 pieces

  • Backdrop, Arch, Balloon Print [No Color/Any Color] Part 850791cb02 ×1
  • Base, Balloon Arch [No Color/Any Color] Part upn0224 ×1
  • Sticker Sheet for Set 850791-1 [No Color/Any Color] Part stickerupn0024 ×1

Bright Light Blue 2 pieces

  • Plate 1 x 2 Bright Light Blue Part 3023 Element 6469765 or 6362254 ×2

Lime 2 pieces

  • Plate 4 x 4 Lime Part 3031 Element 4504850 or 4160080 ×2

Yellow 2 pieces

  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Yellow Part 87580 Element 6126050 or 4565386 ×1

Bright Light Orange 1 piece

  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Bright Light Orange Part 33291 Element 6170304 or 4624184 ×1

Dark Pink 1 piece

  • Plant, Flower, Plate Round 1 x 1 with 4 Petals Dark Pink Part 33291 Element 6170298 or 4216479 ×1

Orange 1 piece

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Orange Part 54200 Element 4504371 or 4248195 ×1

Pearl Gold 1 piece

  • Musical Instrument Horn with Black Bulb Print Pearl Gold Part 87996pr0001 Element 6182458 or 6039797 ×1

Minifigures 2 figures

  • Birthday Clown, Lime Afro Minifigure, checked as a whole figure ×1
  • Boy, Plain White Torso, Short Blue Legs, Dark Brown Hair Minifigure, 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.

Request a replacement from LEGO

Buy the piece

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.

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