Free tool

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.

Mobile Crane

Checking

42233-7 Mobile Crane

60 pieces in 25 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.

Show

Piece checklist

Black 19 pieces

  • Plate Special Round 1 x 1 with Vertical Bar Black Part 3661 Element 6508269 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×7
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×1
  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×2
  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×1
  • Tyre 14 x 6 Solid Smooth Black Part 50951 Element 4246901 ×6

Yellow 11 pieces

  • Technic Axle and Pin Connector Perpendicular Triple Yellow Part 63869 Element 6616693 ×1
  • Technic Beam 1 x 2 Thick Yellow Part 43857 Element 4187122 ×2
  • Technic Beam 1 x 3 Thin Yellow Part 6632 Element 6344174 or 4107823 ×1
  • Technic Beam 1 x 5 Thin with Axle Holes on Ends Yellow Part 11478 Element 6371968 ×2
  • Technic Beam 1 x 9 Thick Yellow Part 40490 Element 6115616 or 4187136 ×1
  • Technic Beam Special 1 x 3 Thin with Trapezoid Frame Yellow Part 7944 Element 6579942 ×1
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Yellow Part 65487 Element 6282151 ×3

Dark Bluish Gray 9 pieces

  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×3
  • Technic Beam 1 x 2 Thin Dark Bluish Gray Part 41677 Element 6338422 or 4210980 ×6

Tan 8 pieces

  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×4
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×3
  • Technic Pin Long without Friction Ridges, with Anti-Roll Notch Tan Part 39888 Element 6321305 ×1

Light Bluish Gray 6 pieces

  • Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×6

Blue 2 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×2

Red 2 pieces

  • Technic Pin 1/2 with Friction Red Part 89678 Element 6378120 1 spare in the box ×2

Dark Tan 1 piece

  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1

Pearl Titanium 1 piece

  • Technic Axle Connector 2 x 3 Quadruple Pearl Titanium Part 11272 Element 6251539 or 6022718 ×1

[No Color/Any Color] 1 piece

  • Activity Card for Set 42233-7 [No Color/Any Color] Part 6591895 Element 6591895 ×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.