Free tool
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
17 pieces in 17 part and color combinations.
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 (Build-a-Mini-0) and each piece's element ID, both listed above.
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Minifig Head Battle Mech, Orange Mask with Dark Gray Visor Print [Hollow Stud]
×1
Minifig Head Beard Stubble, Black Angry Eyebrows with Baring Teeth Open Mouth
×1
Minifig Head Brown Eyebrows, Peach Lips, Pensive Smile Print
×1
Minifig Head Reddish Brown Goatee, Triangular Mustache, Bushy Eyebrows, Thin Smile Print [Hollow Stud]
×1
Minifig Head Tribal Chief, Face Paint with Blue and White Painted Cheeks and Grin
×1
Minifig Head, Brown Stubble, Brown Eyebrows, Crooked Smile and Cheek Lines Print
×1
Minifig Head, Dark Tan Eyebrows, Wink, Teeth Smile Print
×1
Minifig Head, Eyebrows, Eyelashes with Thick Dark Azure Mascara, Smile and Dark Orange Lips Print [Hollow Stud]
×1
Minifig Head, Open Smile Red Lips and Beauty Mark Print [Hollow Stud]
×1
Minifig Head, Stubble Smile / Crinkled Mouth and Inverted Eyebrows Print
×1
Minifig Head, White Ski Goggles with Pink and Purple Glass, Strap and Red Lips
×1
Torso Hoodie with Pocket, Drawstring and Minifig Skull Print, Magenta Arms, Yellow Hands - Back Print
×1
Torso, Letterman Jacket, Open over Gray Top with Red Collar Print [No Back Print], Red Arms, Yellow Hands
×1
Torso, Polo Shirt with Red Collar and Silver Whistle Print, Yellow Arms and Hands
×1
Animal, Monkey / Ape, Chimpanzee with Reddish Brown Face Print
×1
Musical Instrument Guitar Acoustic with Black Neck and Silver Strings Print
×1
Hair Messy with Swept-up Ponytail, Sidebangs and Clip
×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.
