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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.

Ocean Explorer

Checking

31045 Ocean Explorer

213 pieces in 85 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.

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Piece checklist

Light Bluish Gray 49 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Light Bluish Gray Part 48729b Element 6278156 or 4542590 1 spare in the box ×2
  • Bar 6L with Stop Ring Light Bluish Gray Part 63965 Element 6170418 or 6081975 ×2
  • Bracket 1 x 2 - 2 x 2 Light Bluish Gray Part 44728 Element 6117967 or 6009014 ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Bluish Gray Part 3040b Element 4211614 ×4
  • Brick Special 1 x 1 with Stud on 1 Side Light Bluish Gray Part 87087 Element 4558953 ×12
  • Cone 1 x 1 [Top Groove] Light Bluish Gray Part 59900 Element 4529241 ×3
  • Plate 1 x 8 Light Bluish Gray Part 3460 Element 4211425 ×1
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×4
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×3
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Light Bluish Gray Part 3794b ×2
  • Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×1
  • Tap 1 x 1 without Hole in Spout Light Bluish Gray Part 4599b Element 4211503 1 spare in the box ×2
  • Technic Pin Connector Hub with 1 Axle Light Bluish Gray Part 22961 Element 6123815 ×1
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×6
  • Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×1

Dark Blue 35 pieces

  • Brick 1 x 1 Dark Blue Part 3005 Element 6554189 or 4255413 ×2
  • Brick 1 x 4 Dark Blue Part 3010 Element 4264569 ×8
  • Brick Curved 3 x 1 No Studs Dark Blue Part 50950 Element 4540280 or 4275509 ×6
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Blue Part 54200 Element 4504374 or 4502092 1 spare in the box ×10
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Blue Part 3040b Element 6103405 or 4615996 ×2
  • Brick Sloped 45° 2 x 3 Dark Blue Part 3038 Element 4568711 or 4261779 ×2
  • Brick Sloped Inverted 45° 2 x 1 Dark Blue Part 3665 Element 6554200 or 6097498 ×2
  • Wedge Plate 3 x 6 Cut Corners Dark Blue Part 2419 Element 6127326 or 4613323 ×1
  • Wedge Plate 4 x 2 Left Dark Blue Part 41770 Element 4529954 or 4247065 ×1
  • Wedge Plate 4 x 2 Right Dark Blue Part 41769 Element 4502091 or 4247066 ×1

Red 30 pieces

  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×1
  • Brick Curved 3 x 1 No Studs Red Part 50950 Element 4251162 ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Red Part 54200 Element 5074621 or 4504379 1 spare in the box ×4
  • Brick Sloped 45° 2 x 1 Triple with Inside Stud Holder Red Part 15571 Element 6075074 ×1
  • Brick Special 1 x 4 with 4 Studs on One Side Red Part 30414 Element 4177991 or 4157223 ×2
  • Plate 1 x 3 Red Part 3623 Element 362321 ×8
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate 4 x 8 Red Part 3035 Element 303521 ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Red Part 2654 Element 4617080 or 4278275 ×4
  • Plate Round Corner 3 x 3 Red Part 30357 Element 4178428 or 3035721 ×2
  • Tile 1 x 4 with Groove Red Part 2431 Element 243121 ×2

White 29 pieces

  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×3
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin White Part 3040b Element 6552115 or 4121932 ×2
  • Brick Sloped 75° 2 x 1 x 3 with Hollow Stud White Part 4460b Element 6552112 or 446001 ×2
  • Brick Special 1 x 1 with Clip Vertical [Open O Clip, Hollow Stud] White Part 60475b Element 6321349 or 4533763 ×2
  • Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×3
  • Brick Special 1 x 2 with Grille White Part 2877 Element 6552093 or 287701 ×2
  • Panel 1 x 2 x 3 [Side Supports / Hollow Studs] White Part 87544 Element 6550191 or 4585448 ×2
  • Panel 2 x 2 x 1 Corner White Part 91501 Element 6181753 or 4610290 ×2
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×3
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×2
  • Plate Round Corner 3 x 3 White Part 30357 Element 6550165 or 4550745 ×2
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×1

Dark Bluish Gray 22 pieces

  • Brick Sloped 45° 2 x 1 with 2/3 Cutout [New Version] Dark Bluish Gray Part 15672 Element 6069164 or 4621917 ×2
  • Brick Special 1 x 2 with Grille Dark Bluish Gray Part 2877 Element 4210636 ×2
  • Equipment Binoculars Dark Bluish Gray Part 30162 Element 4587887 or 4211051 ×1
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Dark Bluish Gray Part 44302a Element 4210884 ×1
  • Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×1
  • Plate 4 x 4 Dark Bluish Gray Part 3031 Element 4243831 or 4211089 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Dark Bluish Gray Part 4081b Element 6281996 or 4632574 ×2
  • Plate Special 1 x 4 with 2 Studs, 3 Bottom Tubes Dark Bluish Gray Part 92593 Element 4598769 ×2
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×4
  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×4

Yellow 16 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Yellow Part 11477 Element 6029947 ×2
  • Brick Curved 2 x 2 x 2/3 Yellow Part 15068 Element 6079007 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×1
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×4
  • Plate 2 x 2 Yellow Part 3022 Element 4613978 or 302224 ×2
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×3
  • Technic Brick 1 x 2 [1 Pin Hole] Yellow Part 3700 Element 370024 ×1
  • Tile Special 1 x 2 with Handle Yellow Part 2432 Element 243224 ×1

Black 15 pieces

  • Brick 2 x 4 Black Part 3001 Element 300126 ×1
  • Brick Sloped 75° 2 x 2 x 3 [Solid Studs] Black Part 98560 Element 6007896 ×1
  • Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole Black Part 41532 Element 4159335 ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×6
  • Steering Wheel Small, 2 x 2 [Reinforced] Black Part 16091 Element 6057397 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×1
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×2

Trans-Brown 4 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Brown Part 54200 Element 6245263 or 4244368 1 spare in the box ×4

Green 3 pieces

  • Tile 2 x 4 with Groove Green Part 87079 Element 4566179 ×3

Trans-Clear 3 pieces

  • Brick Round 2 x 2 x 1 2/3 Dome Top, Hollow Stud Trans-Clear Part 30151b Element 6514278 or 6286876 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×2

Trans-Green 3 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×3

Trans-Red 3 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×3

Blue 1 piece

  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×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.

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