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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.

Halloween Cat & Mouse

Checking

40570 Halloween Cat & Mouse

328 pieces in 115 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.

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.

4 more look-alike pairs
  • Plate 1 x 2 Black ×11 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.
  • Plate 1 x 3 Black ×10 Dark Bluish Gray ×4 Black is darker than Dark Bluish Gray.
  • Plate 2 x 3 Black ×3 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.
  • Tile 1 x 2 with Groove Black ×2 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.
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Piece checklist

Black 97 pieces

  • Bracket 1 x 1 - 1 x 1 Inverted Black Part 36840 Element 6234695 ×8
  • Brick 1 x 1 Black Part 3005 Element 300526 ×4
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 Also in Dark Bluish Gray ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Black Part 11477 Element 6047276 Also in Dark Bluish Gray ×1
  • Brick Curved 2 x 1 with Inverted Cutout Black Part 78666 Element 6369578 ×3
  • Brick Curved 4 x 1 Double, No Studs Black Part 93273 Element 4613153 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 1 spare in the box Also in Dark Bluish Gray ×16
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 Also in Dark Bluish Gray ×2
  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Black Part 32952 Element 6228987 Also in Dark Bluish Gray ×7
  • Brick Wedged, Curved 2 x 1 with Stud Notch Left Black Part 29120 Element 6181720 ×1
  • Brick Wedged, Curved 2 x 1 with Stud Notch Right Black Part 29119 Element 6181713 ×1
  • Brick Wedged, Curved 2 x 2 with Stud Notches Black Part 66956 Element 6308912 ×1
  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×1
  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box Also in Dark Bluish Gray ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 Also in Dark Bluish Gray ×11
  • Plate 1 x 3 Black Part 3623 Element 362326 Also in Dark Bluish Gray ×10
  • Plate 2 x 3 Black Part 3021 Element 302126 Also in Dark Bluish Gray ×3
  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Black Part 15573 Element 6092585 ×1
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 2 spares in the box ×3
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 Also in Dark Bluish Gray ×2
  • Tile Round 1 x 1 Half Circle Black Part 24246 Element 6256435 1 spare in the box ×9
  • Tile Round 1 x 1 Quarter Black Part 25269 Element 6172383 1 spare in the box ×5

Orange 56 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Orange Part 11477 Element 6055069 ×7
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Orange Part 54200 Element 4504371 or 4248195 1 spare in the box ×9
  • Plant, Plate 1 x 1 Round with 3 Leaves Orange Part 32607 Element 6253884 ×1
  • Plant, Pumpkin Orange Part 51270 Element 6267125 ×2
  • Plate 1 x 1 Orange Part 3024 Element 4524929 or 4203454 1 spare in the box ×10
  • Plate 1 x 2 Orange Part 3023 Element 4177932 or 4163009 ×2
  • Plate 1 x 3 Orange Part 3623 Element 6147047 or 4513281 ×7
  • Plate 2 x 2 Orange Part 3022 Element 4613982 or 4159007 ×3
  • Plate 2 x 3 Orange Part 3021 Element 4125278 ×3
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Orange Part 4032a Element 6030521 or 4164243 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Orange Part 15573 Element 6092599 ×2
  • Tile 1 x 1 with Groove Orange Part 3070b Element 4558595 or 4277770 1 spare in the box ×5
  • Tile Round 1 x 1 Quarter Orange Part 25269 Element 6173925 1 spare in the box ×4

Dark Tan 41 pieces

  • Brick 1 x 1 Dark Tan Part 3005 Element 6001824 or 4497070 ×1
  • Brick 1 x 2 Dark Tan Part 3004 Element 4521914 or 4497069 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Tan Part 11477 Element 6101254 ×2
  • Brick Curved 3 x 1 No Studs Dark Tan Part 50950 Element 6232148 ×2
  • Brick Wedged 2 x 2 Facet Dark Tan Part 87620 Element 6020847 ×1
  • Plate 1 x 1 Dark Tan Part 3024 Element 4549436 or 4497084 1 spare in the box ×2
  • Plate 1 x 4 Dark Tan Part 3710 Element 4626904 or 4497088 ×1
  • Plate 2 x 2 Dark Tan Part 3022 Element 6047415 or 4497081 ×1
  • Plate 2 x 3 Dark Tan Part 3021 Element 6035540 or 6015192 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Tan Part 15573 Element 6092591 ×1
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Tan Part 87580 Element 6126075 or 4578032 ×4
  • Tile 1 x 1 with Groove Dark Tan Part 3070b Element 6055172 1 spare in the box ×6
  • Tile 1 x 2 with Groove Dark Tan Part 3069b Element 4496699 ×6
  • Tile 1 x 4 with Groove Dark Tan Part 2431 Element 6175927 ×1
  • Tile 2 x 2 with Groove Dark Tan Part 3068b Element 4507045 or 4251986 ×2
  • Tile 2 x 4 with Groove Dark Tan Part 87079 Element 6164288 ×2
  • Tile Round 1 x 1 Quarter Dark Tan Part 25269 Element 6362967 or 6242238 1 spare in the box ×6
  • Wedge Plate 2 x 2 Cut Corner Dark Tan Part 26601 Element 6228921 ×1

Dark Bluish Gray 35 pieces

  • Brick 1 x 2 Dark Bluish Gray Part 3004 Element 4211088 ×2
  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Dark Bluish Gray Part 6091 Element 6411327 or 4210797 Also in Black ×3
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Bluish Gray Part 11477 Element 6029948 Also in Black ×3
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box Also in Black ×1
  • Brick Sloped Inverted 45° 2 x 1 Dark Bluish Gray Part 3665 Element 4211096 Also in Black ×3
  • Brick Special 1 x 1 with Stud on 1 Side Dark Bluish Gray Part 87087 Element 4558955 ×3
  • Brick Special 1 x 1 x 1 2/3 with Studs on 1 Side Dark Bluish Gray Part 32952 Element 6228923 Also in Black ×1
  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 1 spare in the box Also in Black ×4
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 Also in Black ×2
  • Plate 1 x 3 Dark Bluish Gray Part 3623 Element 4211133 Also in Black ×4
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 ×2
  • Plate 2 x 3 Dark Bluish Gray Part 3021 Element 4211043 Also in Black ×2
  • Plate Special 1 x 1 with Handle on 2 Ends Dark Bluish Gray Part 78257 Element 6352600 ×1
  • Plate Special 1 x 2 with 5.9mm Towball Socket and Towball Dark Bluish Gray Part 14419 Element 6414554 or 6338166 ×2
  • Plate Special 1 x 2 with End Towball Dark Bluish Gray Part 22890 Element 6370802 or 6338168 ×1
  • Tile 1 x 2 with Groove Dark Bluish Gray Part 3069b Element 4211052 Also in Black ×1

Light Bluish Gray 35 pieces

  • Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section Light Bluish Gray Part 40379 Element 6383116 ×1
  • Bracket 1 x 1 - 1 x 2 Light Bluish Gray Part 79389 Element 6362975 ×1
  • Bracket 1 x 2 - 2 x 2 Light Bluish Gray Part 44728 Element 6117967 or 6009014 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Light Bluish Gray Part 11477 Element 6028813 ×1
  • Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×1
  • Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side Light Bluish Gray Part 22885 Element 6123809 ×4
  • Dish 2 x 2 Inverted [Radar] Light Bluish Gray Part 4740 Element 4211512 ×2
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×6
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×2
  • Plate Round 1 x 1 with Open Stud Light Bluish Gray Part 85861 Element 6168647 or 6124825 1 spare in the box ×3
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Light Bluish Gray Part 60897 Element 6296894 or 4613956 ×2
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×1
  • Plate Special 1 x 2 Rounded with 2 Open Studs Light Bluish Gray Part 35480 Element 6248890 ×3
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×4
  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Light Bluish Gray Part 99206 Element 4654577 ×1
  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×2

Dark Green 20 pieces

  • Brick 1 x 1 Dark Green Part 3005 Element 6618073 or 4521915 ×2
  • Brick 1 x 2 Dark Green Part 3004 Element 6618072 or 4245570 ×1
  • Brick 1 x 4 Dark Green Part 3010 Element 6618074 or 4245571 ×1
  • Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Green Part 11477 Element 6618099 or 6055225 ×6
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Green Part 54200 Element 6618111 or 4504375 1 spare in the box ×2
  • Plate 1 x 1 Dark Green Part 3024 Element 6618077 or 6055169 1 spare in the box ×5
  • Plate 1 x 2 Dark Green Part 3023 Element 6618076 or 6013797 ×1
  • Plate 1 x 4 Dark Green Part 3710 Element 6618083 or 6020923 ×2

Reddish Brown 9 pieces

  • Brick Round Corner 4 x 4 Macaroni Wide with 3 Studs Reddish Brown Part 48092 Element 6330241 or 6211774 ×1
  • Plate 1 x 8 Reddish Brown Part 3460 Element 4216945 ×1
  • Plate 4 x 8 Reddish Brown Part 3035 Element 4211207 ×2
  • Plate Round Corner 4 x 4 Reddish Brown Part 30565 Element 4636170 ×5

Bright Light Orange 7 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Bright Light Orange Part 24866 Element 6209681 1 spare in the box ×2
  • Plant, Plate 1 x 1 Round with 3 Leaves Bright Light Orange Part 32607 Element 6378797 ×2
  • Plate 3 x 3 Bright Light Orange Part 11212 Element 6294582 ×3

Lime 5 pieces

  • Plate 1 x 1 Lime Part 3024 Element 4621557 or 4561480 1 spare in the box ×5

Green 4 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Green Part 24866 Element 6135287 1 spare in the box ×2
  • Plant, Plate 1 x 1 Round with 3 Leaves Green Part 32607 Element 6229130 ×2

White 4 pieces

  • Tile Round 1 x 1 with Offset Black Eye Print White Part 98138pr0008 Element 6284599 or 6029156 2 spares in the box ×4

Coral 3 pieces

  • Plate 1 x 1 Coral Part 3024 Element 6258091 1 spare in the box ×3

Bright Pink 2 pieces

  • Plate Round 1 x 1 with Solid Stud Bright Pink Part 6141 Element 4517996 2 spares in the box ×2

Flat Silver 2 pieces

  • Weapon Bladed Claw Spread Flat Silver Part 10187 Element 6004345 1 spare in the box ×2

Red 2 pieces

  • Plant, Flower, Plate Round 1 x 1 with 5 Petals Red Part 24866 Element 6206148 1 spare in the box ×2

Tan 2 pieces

  • Hinge Brick 1 x 2 Base Tan Part 3937 Element 6174919 or 4542399 ×1
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1

Dark Turquoise 1 piece

  • Brick 2 x 2 Dark Turquoise Part 3003 Element 6314091 or 4120399 ×1

Medium Lavender 1 piece

  • Brick 1 x 1 Medium Lavender Part 3005 Element 6015104 or 4651903 ×1

Medium Nougat 1 piece

  • Brick 2 x 4 Medium Nougat Part 3001 Element 6135191 or 4645064 ×1

Olive Green 1 piece

  • Plant, Grass Stem with Bar Hole [3.2mm] Olive Green Part 15279 Element 6226619 or 6188694 ×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

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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.

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