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.

Basic Building Set

Checking

735 Basic Building Set

538 pieces in 141 part and color combinations.

LEGO counts 537 pieces. This inventory comes from a separate parts catalog and lists 538; 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.

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.

Show

Piece checklist

Red 238 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×28
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×24
  • Brick 1 x 2 x 2 with Fire Logo Print Red Part 3245bpr0010 ×2
  • Brick 1 x 3 Red Part 3622 Element 362221 ×8
  • Brick 1 x 4 Red Part 3010 Element 301021 ×10
  • Brick 1 x 6 Red Part 3009 Element 300921 ×11
  • Brick 1 x 8 Red Part 3008 Element 300821 ×7
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick 2 x 2 Corner Red Part 2357 Element 235771 or 235721 ×4
  • Brick 2 x 4 Red Part 3001 Element 300121 ×1
  • Brick 2 x 6 Red Part 2456 Element 4181138 or 245621 ×1
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×2
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×1
  • Brick Sloped 45° 2 x 3 Red Part 3038 Element 6303213 or 4195081 ×2
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×2
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×12
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×14
  • Door 1 x 3 x 2 Left Red Part 3189 Element 4121824 ×2
  • Door 1 x 3 x 2 Right Red Part 3188 Element 4121823 ×2
  • Door 1 x 3 x 4 Left Red Part 3193 ×1
  • Door 1 x 3 x 4 Right Red Part 3192 ×1
  • Hinge Brick 1 x 2 Base Red Part 3937 Element 393721 ×1
  • Hinge Brick 1 x 2 Top Plate Thin Red Part 3938 Element 6534944 or 6078079 ×1
  • Hinge Plate 2 x 5 with Large Hole [Complete Assembly] Red Part 3149bc01 Element 4188477 or 4106942 ×1
  • Plate 1 x 1 Red Part 3024 Element 302421 1 spare in the box ×8
  • Plate 1 x 10 Red Part 4477 Element 447721 ×4
  • Plate 1 x 2 Red Part 3023 Element 302321 ×8
  • Plate 1 x 4 Red Part 3710 Element 371021 ×9
  • Plate 1 x 6 Red Part 3666 Element 366621 ×6
  • Plate 1 x 8 Red Part 3460 Element 346021 ×14
  • Plate 2 x 6 Red Part 3795 Element 379521 ×6
  • Plate 4 x 12 Red Part 3029 Element 4514717 or 302921 ×1
  • Plate 4 x 6 Red Part 3032 Element 303221 ×2
  • Plate 4 x 8 Red Part 3035 Element 303521 ×3
  • Plate 6 x 6 Red Part 3958 Element 4144302 ×1
  • Plate 6 x 8 Red Part 3036 Element 303671 or 303621 ×2
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Red Part 4081b Element 6281994 or 4632572 ×4
  • Plate Special 1 x 1 with Clip Vertical [Thick U Clip] Red Part 4085c Element 408521 ×12
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Red Part 3794a ×1
  • String Reel 2 x 4 x 2 Holder With Closed Studs Red Part 4209 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×4
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×2
  • Turntable 2 x 2 Plate, Base Red Part 3680 Element 368021 ×1
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Red Part 3403c01 Element 4221665 or 4143678 ×1
  • Window 1 x 2 x 3 Shutter Red Part 3856 Element 4189092 or 385621 ×4
  • Window 1 x 4 x 3 Red Part 3853 Element 385321 ×2

White 126 pieces

  • Bar 1 x 6 [Open Studs] White Part 4873 Element 487301 ×2
  • Battery Box, 9V Small [Complete Assembly] White Part 4760c01 ×1
  • Brick 1 x 1 with Thick Bold Black '3' Print White Part 3005pr9998 ×4
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×8
  • Brick 1 x 3 White Part 3622 Element 6550143 or 362201 ×4
  • Brick 1 x 3 with Control Panel Print White Part 3622pr9994 ×2
  • Brick 1 x 4 with Red Danger Stripes Print White Part 3010pr9976 ×1
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×2
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] White Part 3660 Element 366001 ×12
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×8
  • Fence Lattice 1 x 4 x 1 White Part 3633 Element 4550171 or 363301 ×9
  • Light Brick 1 x 2 [Single Bulb] White Part 4767 Element 73666 ×2
  • Light Brick 1 x 4 [Two Bulbs] White Part 4771 ×1
  • Light Brick 1 x 8 [3 Prisms] White Part 2500c01 Element 74339 ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×6
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×1
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×2
  • Plate 1 x 8 White Part 3460 Element 6550141 or 346001 ×3
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×2
  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×12
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×3
  • Plate 2 x 4 with Electric Contacts White Part 4757 Element 475701 or 73534 ×2
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×1
  • Plate 2 x 8 with Electric Contacts White Part 4758 Element 475801 or 73535 ×2
  • Plate 4 x 4 White Part 3031 Element 6552127 or 4243812 ×1
  • Plate 4 x 6 White Part 3032 Element 303201 ×1
  • Plate 4 x 8 White Part 3035 Element 6609533 or 303501 ×5
  • Plate 6 x 8 White Part 3036 Element 303651 or 303601 ×1
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 Also in Trans-Clear ×4
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×2
  • Plate Special 1 x 2 with Long Towball White Part 2508 Element 6554683 or 6333949 ×1
  • Plate Special 1 x 4 with Towball Socket, Long, 2 Slots White Part 3183a ×1
  • Plate Special 3 x 2 with Rounded End, Hole White Part 3176 Element 6609537 or 6089696 ×1
  • Tile 2 x 2 with Red Warning Triangle Print White Part 3068bpr0030 Element 4140790 ×1
  • Tile 2 x 2 with White Arrow on Blue Disc Print White Part 3068bpr0029 Element 80175 ×1
  • Wheel with Split Axle hole White Part 3482 Element 4279395 or 4194244 ×8

Light Gray 79 pieces

  • Brick 1 x 1 Light Gray Part 3005 Element 300502 ×2
  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×1
  • Brick 2 x 2 Light Gray Part 3003 Element 4103591 or 300352 ×1
  • Brick Round 1 x 1 Open Stud Light Gray Part 3062b Element 306202 ×8
  • Brick Round 2 x 2 with Buttons on Black Panel Print on Two Sides Light Gray Part 3941pr0002 ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Gray Part 3040b Element 4121933 or 304002 ×2
  • Brick Sloped 45° 2 x 2 with 12 Buttons, 3 Red Lamps, Black Panel Print Light Gray Part 3039pr9996 ×3
  • Brick Special 1 x 1 with Headlight Light Gray Part 4070 Element 407002 ×2
  • Cone 1 x 1 [No Top Groove] Light Gray Part 4589 Element 458902 ×1
  • Door 1 x 3 x 4 Left Light Gray Part 3193 ×3
  • Door 1 x 3 x 4 Right Light Gray Part 3192 ×3
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Light Gray Part 4349 Element 434902 ×2
  • Hook, Plate 1 x 2 with Crane Hook Left Light Gray Part 3127 Element 312702 ×1
  • Ladder 14 x 2.5 Light Gray Part 4207 Element 4100373 ×3
  • Minifig Hose Nozzle Simple with 13L Black String Light Gray Part 194c04 Element 4105188 ×2
  • Plate 1 x 1 Light Gray Part 3024 Element 302402 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×1
  • Plate Round 1 x 1 with Solid Stud Light Gray Part 6141 Element 614102 ×8
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Light Gray Part 3839b Element 383902 ×1
  • Plate Special 1 x 2 with Ladder Light Gray Part 4175 Element 4100526 or 417502 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Light Gray Part 3829c01 Element 9556 ×1
  • Tap 1 x 1 with Hole in Spout Light Gray Part 4599a Element 459902 ×8
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×2
  • Technic Bush 1/2 Toothed Type I [+ Opening] Light Gray Part 4265a Element 426502 1 spare in the box ×12
  • Tile 2 x 2 with Groove Light Gray Part 3068b Element 306802 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Weapon Axe Light Gray Part 3835 Element 383502 ×2

Black 25 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Sound Brick, Round, 9V 2 x 2 x 1 1/3 with Two Town Police Noises Black Part 4774c01 ×1
  • String Cord Thin (0.5mm) 150cm Black Part 56823c150 Element 4276324 or 70094 ×1
  • String Reel 2 x 4 x 2 Drum Black Part 4208 Element 4262023 or 4248436 ×3
  • Technic Axle 8 Black Part 3707 Element 370726 ×4
  • Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×2
  • Tyre 30 x 10.5 Offset Tread Black Part 2346 Element 234676 or 234626 ×8
  • Wire with Brick 2 x 2 x 2/3 Pair, 15L Black Part 5306bc015 Element 75565 ×2

Trans-Yellow 16 pieces

  • Brick Round 1 x 1 x 2/3 Light Bulb Cover Trans-Yellow Part 4770 Element 477044 ×6
  • Plate 1 x 1 Trans-Yellow Part 3024 Element 6513966 or 6252045 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×8

Trans-Dark Blue 10 pieces

  • Brick Round 1 x 1 x 2/3 Light Bulb Cover Trans-Dark Blue Part 4770 Element 477043 ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 ×6

Trans-Red 10 pieces

  • Brick Round 1 x 1 x 2/3 Light Bulb Cover Trans-Red Part 4770 Element 4226863 or 477041 ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×6

Yellow 10 pieces

  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×4
  • Flexible Hose 8.5L with Tabless Ends Black (Ends different color than Tube) Yellow Part 73590c01b ×2
  • String Reel 2 x 4 x 2 Holder With Closed Studs Yellow Part 4209 ×2
  • Tile 1 x 1 with Red and Black Buttons Print Yellow Part 3070bpr0031 Element 81183 1 spare in the box ×2

Blue 8 pieces

  • Brick Round 1 x 1 Open Stud Blue Part 3062b Element 306223 ×3
  • Seat / Chair 2 x 2 Blue Part 4079 ×5

Dark Gray 4 pieces

  • Equipment Shovel [Rounded Handle End] Dark Gray Part 3837 Element 383727 ×2
  • Tool Pickaxe Dark Gray Part 3841 Element 384127 ×2

Trans-Clear 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 Also in White ×4

Trans-Green 4 pieces

  • Brick Round 1 x 1 x 2/3 Light Bulb Cover Trans-Green Part 4770 Element 477048 ×4

Trans-Light Blue 4 pieces

  • Panel 1 x 2 x 2 [Solid Studs] Trans-Light Blue Part 4864a Element 4113030 ×2
  • Windscreen 2 x 4 x 2 Trans-Light Blue Part 3823 Element 6581802 or 6253682 ×2

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