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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.

Theatre Set (Theater)

Checking

9131 Theatre Set (Theater)

109 pieces in 54 part and color combinations.

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

Duplo, Quatro and Primo 98 pieces

  • Duplo Animal Horse with One Stud and Moveable Head, Eyes Print Black Part 75725pr0001 Element 4143789 ×1
  • Duplo Cape with Hood Black Part 42311 Element 4163219 ×2
  • Duplo Hat, Pointed with Beard Black Part 42088 Element 4162987 ×1
  • Duplo Pot / Kettle with Handles Black Part 31330 Element 4169157 ×1
  • Duplo Dinosaur Tyrannosaurus Rex Adult without Spots Print Bright Green Part 31050pr0001 Element 4169108 or 4169107 ×1
  • Duplo Plant, Flower with 1 Top Stud Bright Green Part 6510 Element 4121575 ×1
  • Duplo Table 3 x 4 x 1 1/2 with 4 Top Studs Brown Part 6479 Element 4164451 ×1
  • Duplo Brick 2 x 4 Dark Gray Part 3011 Element 4171471 or 4119630 ×1
  • Duplo Brick 2 x 8 Dark Gray Part 4199 Element 4171480 or 4119634 ×2
  • Duplo Plate 4 x 4 with 2 x 2 x 2 Dome Top and Cross Cut Slots Dark Gray Part 42058 Element 4169950 ×4
  • Duplo Shield, Flat Triangle with Red Stripes and Hearts Print Dark Gray Part 42274pr0001 Element 4170962 ×1
  • Duplo Shield, Flat Triangle with Yellow and Gray and Dinosaur Print Dark Gray Part 42274pr0002 Element 4170961 ×1
  • Duplo Brick 2 x 2 Flat Dark Gold Part 3437 Element 4164474 ×3
  • Duplo Chair with 4 Studs and Rounded Back Flat Dark Gold Part 31065 Element 4171306 ×2
  • Duplo Wand with 7 Point Star Glitter Trans-Clear Part 42077 Element 4162968 ×1
  • Duplo Bed 3 x 5 x 1 2/3 Green Part 4895 Element 4112062 ×1
  • Duplo Fire / Grass / Ice 1 x 4 x 2 Green Part 31168 Element 4589698 or 4114440 ×2
  • Duplo Frog Costume Green Part 42089 Element 4162988 ×1
  • Duplo Plate 4 x 4 with 2 x 2 x 2 Dome Top and Cross Cut Slots Green Part 42058 ×4
  • Duplo Animal Cat with White Stripes and Paws Print Light Gray Part 31102pr0001 Element 4114702 ×1
  • Duplo Sword, Thin Light Gray Part 42084 Element 4173496 ×2
  • Duplo Technic Axle 6 Light Gray Part 6522 Element 652202 ×2
  • Duplo Plant, Flower with 1 Top Stud Medium Orange Part 6510 Element 4144341 or 4121751 ×1
  • Duplo Animal Pig / Piglet on Green Base Nougat Part 75726 Element 75726 ×3
  • Duplo Cape with Blue Lining with Stars Print Red Part 42310 Element 4163218 ×2
  • Duplo Technic Brick 2 x 4 with 3 Holes Red Part 6517 Element 6182716 or 4621141 ×2
  • Duplo Wings Red Part 42793 Element 4171894 ×1
  • Duplo Animal Chicken / Hen, Tail, Smooth Red Comb, on Green Base White Part 75021pr0001 Element 75021 ×1
  • Duplo Brick 2 x 2 x 2 with Vertical Grooves White Part 41978 Element 4166751 ×12
  • Duplo Fire / Grass / Ice 1 x 4 x 2 White Part 31168 Element 4589699 or 4165991 ×2
  • Duplo Hat with Veil White Part 42309 Element 4166879 ×1
  • Duplo Plate 4 x 4 with 2 x 2 x 2 Dome Top and Cross Cut Slots White Part 42058 Element 4169949 ×8
  • Duplo Plate 8 x 16 White Part 6490 Element 6346622 or 4654841 ×1
  • Duplo Shroud, Ghost Costume White Part 31153 Element 4172588 ×1
  • Duplo Sound Effects Brick with Dark Gray Base and Castle Sounds White Part 42104c01pr0001 Element 4162997 ×2
  • Duplo Crown Yellow Part 42001 Element 4271118 or 4162962 ×1
  • Duplo Lamp Post Yellow Part 42083 Element 4170989 ×6
  • Duplo Plant, Flower with 1 Top Stud Yellow Part 6510 Element 4100853 ×1
  • Duplo Plate 2 x 4 Yellow Part 40666 Element 4160152 ×6
  • Duplo Technic Crank Handle Yellow Part 6526 Element 4493718 or 652624 ×2
  • Duplo Technic Wedge Belt Wheel Yellow Part 6527 Element 6124039 or 4600513 ×2
  • Backdrop for Set 3615-2 / 9131-1, Mirror and Orange Curtains / Alchemy Lab [No Color/Any Color] Part 4173817 Element 4173817 ×1
  • Backdrop for Set 3615-2 / 9131-1, Tree, Daytime / Nighttime [No Color/Any Color] Part 4173816 Element 4173816 ×1
  • Backdrop for Sets 3615-2 / 9131-1, Room Interior / Castle Gate [No Color/Any Color] Part 4173946 Element 4173946 ×1
  • Backdrop for Sets 3615-2 and 9131-1, Serpentine Road, Castle / Serpentine Road, Forest [No Color/Any Color] Part 4173945 Element 4173945 ×1
  • Backdrop for Sets 3615-2 and 9131-1, Theater Curtains, Green Borders / Light Orange [No Color/Any Color] Part 4173814 Element 4173814 ×1
  • Duplo Playmat for Sets 3615-2, 9131-1, Straight Road / Royal Carpet Print [No Color/Any Color] Part 4182737 Element 4182737 ×1
  • Playmat, Duplo, Curved Road, Firepit / Curved Road, Pond Print [No Color/Any Color] Part 4182735 Element 4182735 ×1

Non-Buildable Figures (Duplo, Fabuland, etc) 11 pieces

  • Duplo Figure, Early, with Short Parted Hair Black, Dark Gray Legs, White Arms, Moustache (Actor) Blue Part 74511pr0019 Element 4171807 ×2
  • Duplo Figure, Early, Hair Bob Black, Black Legs, Tunic with Blue Patches and Rope Belt, Wart on Nose (Actress) Dark Gray Part 74298pr0043 Element 4171786 ×2
  • Duplo Figure, Early Child, with Pigtails Light Yellow, White Legs, Dark Pink Collar and Buttons Print Orange Part 76045pr0005 Element 4171575 ×2
  • Duplo Figure, Early, Dress Red, Green and Gold Collar, Brown Hair, Red Lipstick and Cheeks Print (Actress) Red Part 31181pr0004 Element 4171811 ×2
  • Duplo Figure, Early Child, with Straight Hair Fabuland Brown, Brown Legs, Green Vest Print Yellow Part 75176pr0006 Element 4171576 ×2
  • Duplo Figure, Early, Hair Bob Light Gray, Medium Green Legs, White Collar and Pink Pendant, Glasses Print Yellow Part 74298pr0018 Element 75484 ×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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