BlockTalk Find Your Set

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.

Math Machines Set

Checking

9544 Math Machines Set

554 pieces in 66 part and color combinations.

LEGO counts 555 pieces. This inventory comes from a separate parts catalog and lists 554; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.

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

Bricks 413 pieces

  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×100
  • Brick 2 x 2 Blue Part 3003 Element 4103589 or 300373 ×4
  • Brick 2 x 2 x 3 Blue Part 30145 Element 6425989 or 4107573 ×4
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×1
  • Brick 1 x 2 Green Part 3004 Element 4107736 or 300428 ×100
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×100
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×4
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×100

Duplo, Quatro and Primo 78 pieces

  • Duplo Tile 2 x 2 White Part 6309 Element 4219247 or 630901 ×4
  • Duplo Tile 2 x 2 with Addition ( '+' ) Print White Part 6309pr0073 Element 4520749 or 4219335 ×4
  • Duplo Tile 2 x 2 with Equal To ( '=' ) Print White Part 6309pr0072 Element 4520748 or 4219333 ×3
  • Duplo Tile 2 x 2 with Less Than ( '<' ) / Greater Than ( '>' ) Print White Part 6309pr0071 Element 4520747 or 4219331 ×3
  • Duplo Tile 2 x 2 with Minus ( '-' ) Print White Part 6309pr0074 Element 4520751 or 4219337 ×4
  • Duplo Tile 2 x 2 with Multiplication ( 'x' ) Print White Part 6309pr0075 Element 4520754 or 4219434 ×2
  • Duplo Tile 2 x 2 with Number '0' Print White Part 6309pr0070 Element 6039746 or 4520746 ×3
  • Duplo Tile 2 x 2 with Number '1' Print White Part 6309pr0061 Element 6039735 or 4520737 ×3
  • Duplo Tile 2 x 2 with Number '2' Print White Part 6309pr0062 Element 6039736 or 4520738 ×3
  • Duplo Tile 2 x 2 with Number '3' Print White Part 6309pr0063 Element 6039737 or 4520739 ×3
  • Duplo Tile 2 x 2 with Number '4' Print White Part 6309pr0064 Element 6039738 or 4520740 ×3
  • Duplo Tile 2 x 2 with Number '5' Print White Part 6309pr0065 Element 6039741 or 4520741 ×3
  • Duplo Tile 2 x 2 with Number '6' Print White Part 6309pr0066 Element 6039742 or 4520742 ×3
  • Duplo Tile 2 x 2 with Number '7' Print White Part 6309pr0067 Element 6039743 or 4520743 ×3
  • Duplo Tile 2 x 2 with Number '8' Print White Part 6309pr0068 Element 6039744 or 4520744 ×3
  • Duplo Tile 2 x 2 with Number '9' Print White Part 6309pr0069 Element 6039745 or 4520745 ×3
  • Duplo Tile 2 x 2 with Shape Blue Disc Print White Part 6309pr0139 Element 4520771 ×2
  • Duplo Tile 2 x 2 with Shape Blue Isosceles Triangle Print White Part 6309pr0129 Element 4520801 ×1
  • Duplo Tile 2 x 2 with Shape Blue Quarter Disc Print White Part 6309pr0127 Element 4520766 ×4
  • Duplo Tile 2 x 2 with Shape Blue Right Triangle Print White Part 6309pr0128 Element 4520795 ×4
  • Duplo Tile 2 x 2 with Shape Blue Square Print White Part 6309pr0138 Element 4520759 ×2
  • Duplo Tile 2 x 2 with Shape Green Isosceles Triangle Print White Part 6309pr0137 Element 4520803 ×1
  • Duplo Tile 2 x 2 with Shape Red Disc Print White Part 6309pr0133 Element 4520770 ×2
  • Duplo Tile 2 x 2 with Shape Red Isosceles Triangle Print White Part 6309pr0136 Element 4520799 ×1
  • Duplo Tile 2 x 2 with Shape Red Quarter Disc Print White Part 6309pr0134 Element 4520765 ×4
  • Duplo Tile 2 x 2 with Shape Red Right Triangle Print White Part 6309pr0135 Element 4520794 ×4
  • Duplo Tile 2 x 2 with Shape Red Square Print White Part 6309pr0132 Element 4520755 ×2
  • Duplo Tile 2 x 2 with Shape Yellow Isosceles Triangle Print White Part 6309pr0131 Element 4520802 ×1

Technic Bricks 12 pieces

  • Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] Black Part 32064b ×4
  • Technic Brick 1 x 12 [11 Pin Holes] Blue Part 3895 Element 389523 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Blue Part 3701 Element 370123 ×4

Technic Gears 11 pieces

  • Technic Gear 8 Tooth Light Bluish Gray Part 3647 Element 4211432 or 3647194 ×3
  • Technic Gear 40 Tooth Red Part 3649 Element 4120108 ×4
  • Technic Gear 24 Tooth [New Style with Single Axle Hole] Yellow Part 3648b Element 4195172 or 4120163 ×4

Plates 8 pieces

  • Plate 2 x 16 Yellow Part 4282 Element 6207377 or 428224 ×2
  • Plate 4 x 4 Yellow Part 3031 Element 4243817 or 303124 ×4
  • Plate 4 x 6 Yellow Part 3032 Element 303224 ×2

Technic Axles 5 pieces

  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×1
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2

Technic Pins 5 pieces

  • Technic Pin Long without Friction Ridges - Single Slot Light Bluish Gray Part 32556a Element 4211709 ×2
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×3

Baseplates 4 pieces

  • Baseplate 32 x 32 White Part 3811 Element 6295194 or 4244677 ×4

Plates Special 3 pieces

  • Bracket 2 x 2 - 2 x 2 Blue Part 3956 Element 6019215 or 395623 ×1
  • Technic Plate 2 x 6 [5 Holes] Yellow Part 32001 Element 6038194 or 4107750 ×2

Technic Bushes 3 pieces

  • Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×3

Gear Parts 2 pieces

  • Storage Bin, Dacta, Medium Blue Part upn0038 ×1
  • Storage Bin Lid, Dacta, 19 x 24 Trans-Clear Part 71082 ×1

Minifigs 2 pieces

  • Juniors Midifig, Max, Blue Torso, Black Legs Blue Part 76519pr0002 ×1
  • Juniors Midifig, Tina, Orange Torso, Light Gray Legs Orange Part 76520pr0003 ×1

Non-System Parts 2 pieces

  • Playmat, 4 Holes, Red, Blue, Green, and Yellow Circles Print [No Color/Any Color] Part 49785 Element 4224724 ×1
  • Punch-outs, for Set 9544 [No Color/Any Color] Part 53447 Element 4270508 ×1

Technic Beams 2 pieces

  • Technic Beam 1 x 4 Thin Black Part 32449 Element 6327548 or 4142236 ×1
  • Technic Beam 1 x 7 Bent (4 - 4) Thick Blue Part 32348 Element 6345498 or 6302340 ×1

Wheels and Tyres 2 pieces

  • Tyre 81.6 x 15 Motorcycle Black Part 2902 Element 6226880 or 4562873 ×1
  • Wheel 61.6 x 13.6 Motorcycle White Part 2903 Element 290301 ×1

Technic Connectors 1 piece

  • Technic Pin Connector Round [No Slot] Red Part 75535 Element 75854 ×1

Technic Special 1 piece

  • Ball, Hard Plastic, 51mm (approx. 6 studs diameter) Red Part 41250 Element 4156530 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy