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.
Technic Axle Connector 2 x 3 QuadruplePearl TitaniumPart 11272Element 6251539 or 6022718×1
Technic Beams Special
5 pieces
Technic Beam 1 x 2 with Ball Joint Straight, Smooth BallDark Bluish GrayPart 64276Element 6136458 or 6030824×2
Technic Beam 1 x 3 with Ball Joint in MiddleDark Bluish GrayPart 98577Element 6001085×3
Animal / Creature Body Parts
4 pieces
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, SmallFlat SilverPart 53451Element 6270108 or 46129012 spares in the box×4
Minifig Upper Body
4 pieces
Arm Mechanical with Clip [Thick Support]RedPart 98313Element 6014030×4
Technic Beams
4 pieces
Technic Beam 1 x 3 ThickBlackPart 32523Element 4142822 or 3252326×1
Technic Beam 3 x 5 L-Shape ThickBlackPart 32526Element 4142823 or 3252626×2
Technic Beam 1 x 2 ThickLight Bluish GrayPart 43857Element 4211862×1
Energy Effects
3 pieces
Large Figure Weapon Accessory, Flame / Lightning Bolt with Axle Hole with Marbled Trans-Yellow PatternTrans-RedPart 11302pat0001Element 6016236×3
Minifig Shields, Weapons, & Tools
3 pieces
Weapon Scythe / Crescent Blade Serrated with BarFlat SilverPart 98141Element 6270142 or 4651535×2
Weapon Spike Flexible 3.5LLight Bluish GrayPart 64727Element 6270081 or 4616840×1
Technic Bushes
3 pieces
Technic BushLight Bluish GrayPart 3713Element 6275844 or 62718171 spare in the box×3
Technic Special
1 piece
Technic Ball Joint with Through Axle HoleBlackPart 53585Element 4286267×1
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.