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.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
Look-alike colors in this set
These parts appear in this set in two colors that are easy to confuse. If you are one short in one color,
check whether it went in where the other color belongs. Each color has its own element ID in the parts list
at the back of the instructions.
Technic Beam 1 x 3 ThickBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Steering Gear with 3 Towball Joints, CompactDark Bluish GrayPart 15460Element 6359227 or 6055629×2
Tan
19 pieces
Technic Axle 4 with Centre StopTanPart 99008Element 4666999×5
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×2
Technic Engine Crankshaft CenterTanPart 2854Element 6355727 or 6013937×3
Technic Gear 12 Tooth BevelTanPart 6589Element 4565452 or 4514556×5
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]TanPart 18575Element 6346517 or 6084724×2
Technic Pin 3/4TanPart 32002Element 6663097 or 60139381 spare in the box×2
Reddish Brown
11 pieces
Technic Axle 3 with StopReddish BrownPart 24316Element 6135494×7
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×4
Trans-Red
8 pieces
Tile 1 x 1 with GrooveTrans-RedPart 3070bElement 6581817 or 62542481 spare in the box×2
Tile 1 x 2 with GrooveTrans-RedPart 3069bElement 6514220 or 6251290×6
Trans-Clear
4 pieces
Plate Round 2 x 2 with Rounded Bottom [Boat Stud]Trans-ClearPart 2654Element 6581772 or 6163901×4
Trans-Orange
2 pieces
Tile Round 1 x 1Trans-OrangePart 98138Element 6514197 or 62747471 spare in the box×2
White
1 piece
Tile 2 x 4 with GrooveWhitePart 87079Element 6548271 or 4560178×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 42111-1[No Color/Any Color]Part 68300Element 6303283×1
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.