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.
Tap 1 x 1 without Hole in SpoutWhitePart 4599bElement 459901×11
Tubes and Hoses
12 pieces
Axle Hose, Soft 12LWhitePart 32200Element 4296264 or 4227522×9
Cable, Flexible 21L with 2 Connectors and BarsWhitePart 2630Element 6409728×3
Minifig Upper Body
10 pieces
Arm Mechanical with Clip [Thick Support]BlackPart 98313Element 6276867 or 6006739×10
Bricks Special
7 pieces
Bracket 5 x 2 x 1 1/3 with Holes, Pin BottomBluePart 11215Element 6033353×1
Brick Special 1 x 1 with Stud on 1 SideBluePart 87087Element 4583862×4
Brick Special 2 x 2 with Pin and Axle HoleRedPart 6232Element 6347696 or 623221×2
Hinges, Arms and Turntables
6 pieces
Hinge Brick 1 x 4 [Lower]WhitePart 3831Element 6619285 or 383101×2
Hinge Brick 1 x 4 [Upper]WhitePart 3830Element 6327411 or 6011456×2
Turntable 4 x 4 Square Base, LockingYellowPart 61485Element 6310219×2
Animal / Creature Body Parts
4 pieces
Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End SectionWhitePart 40379Element 6110023 or 4508454×4
Technic Axles
4 pieces
Technic Axle 6BlackPart 3706Element 370626×1
Technic Axle 8RedPart 3707Element 6130004×1
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×2
Technic Special
4 pieces
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×2
Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole, No Arm HolesWhitePart 67696Element 6360826×2
Technic Bushes
3 pieces
Technic BushRedPart 3713Element 6271820 or 4227155×3
Technic Beams
2 pieces
Technic Beam 3 x 3 T-Shape ThickYellowPart 60484Element 6072627×2
Technic Panels
2 pieces
Technic Panel 3 x 5 with Wall Mount HoleBlackPart 67139Element 6302094×2
Minifig Shields, Weapons, & Tools
1 piece
Tool CrowbarBlackPart 92585Element 6186698×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
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.
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.