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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.

London

Checking

21034 London

468 pieces in 98 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.

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Piece checklist

Plates 125 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×12
  • Plate 1 x 4 Black Part 3710 Element 371026 ×5
  • Plate 1 x 8 Black Part 3460 Element 346026 ×4
  • Plate 2 x 12 Black Part 2445 Element 244526 ×4
  • Plate 2 x 2 Black Part 3022 Element 302226 Also in Dark Bluish Gray ×2
  • Plate 2 x 3 Black Part 3021 Element 302126 ×3
  • Plate 2 x 6 Black Part 3795 Element 379526 ×2
  • Plate 4 x 8 Black Part 3035 Element 303526 ×1
  • Plate 2 x 2 Dark Bluish Gray Part 3022 Element 4211094 Also in Black ×2
  • Plate 1 x 2 Light Bluish Gray Part 3023 Element 4211398 or 3023194 ×7
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×8
  • Plate 2 x 2 Corner Light Bluish Gray Part 2420 Element 4211353 ×1
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×4
  • Plate 2 x 6 Light Bluish Gray Part 3795 Element 4211452 or 3795194 ×3
  • Plate 1 x 1 Tan Part 3024 Element 4159553 or 302405 1 spare in the box ×4
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×4
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×2
  • Plate 2 x 2 Tan Part 3022 Element 4114084 or 302205 ×8
  • Plate 2 x 3 Tan Part 3021 Element 4118790 or 302105 ×4
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×3
  • Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 Also in White ×23
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×7
  • Plate 1 x 10 White Part 4477 Element 6552113 or 6550148 ×2
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 Also in Trans-Clear ×9
  • Plate 3 x 3 Cross White Part 15397 Element 6099412 ×1

Tiles 90 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×3
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 Also in Dark Bluish Gray ×3
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×3
  • Tile 1 x 8 with London Print Black Part 4162pr0050 Element 6174611 ×1
  • Tile 1 x 4 with Groove Dark Bluish Gray Part 2431 Element 4211053 Also in Black ×4
  • Tile 1 x 1 with Groove Light Bluish Gray Part 3070b Element 4211415 1 spare in the box ×7
  • Tile 1 x 2 with Groove Light Bluish Gray Part 3069b Element 4211414 ×9
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×4
  • Tile 1 x 1 with Groove Medium Blue Part 3070b Element 4527526 or 4235958 1 spare in the box ×4
  • Tile 1 x 2 with Groove Medium Blue Part 3069b Element 4168345 ×4
  • Tile 1 x 1 with Groove Tan Part 3070b Element 4125253 1 spare in the box ×4
  • Tile 1 x 2 with Groove Trans-Clear Part 3069b Element 6514223 or 6251294 ×40
  • Tile 1 x 1 with Groove White Part 3070b Element 6550138 or 307001 1 spare in the box ×3
  • Tile 2 x 3 White Part 26603 Element 6552162 or 6550161 ×1

Plates Special 86 pieces

  • Plate Special 2 x 2 x 2/3 with Two Studs On Side and Two Raised [Solid Anti-stud] Black Part 99206 Element 6052126 ×1
  • Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 1 Support Wall on Bottom Black Part 87609 Element 4653049 ×6
  • Bracket 1 x 2 - 1 x 2 Inverted Dark Bluish Gray Part 99780 Element 6000606 ×4
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Bluish Gray Part 15573 Element 6092572 ×8
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Dark Bluish Gray Part 60478 Element 4521187 ×4
  • Bracket 1 x 2 - 1 x 2 Light Bluish Gray Part 99781 Element 4654582 ×4
  • Bracket 1 x 2 - 2 x 2 Inverted Light Bluish Gray Part 99207 Element 4654580 ×4
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×6
  • Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×4
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Light Bluish Gray Part 87580 Element 6126082 or 4565393 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Medium Blue Part 15573 Element 6092601 ×2
  • Plate Special 1 x 1 with Tooth Tan Part 49668 Element 4224793 ×8
  • Plate Special 1 x 1 with Vertical Tooth Tan Part 15070 Element 6143058 ×8
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Tan Part 15573 Element 6092587 ×4
  • Plate Special 1 x 2 with Three Teeth [Tri-Tooth] Tan Part 15208 Element 6046907 ×4
  • Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip] White Part 61252 Element 6347293 or 4538353 ×4
  • Plate Special 1 x 1 with Vertical Tooth White Part 15070 Element 6615559 or 6046905 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) White Part 15573 Element 6550152 or 6051511 ×4
  • Plate Special 1 x 2 with Pin Hole on Top White Part 11458 Element 6632146 or 6057414 ×4
  • Plate Special Round 2 x 2 with Center Stud (Jumper Plate) White Part 18674 Element 6615555 or 6093053 ×3

Tiles Special 44 pieces

  • Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Dark Bluish Gray Part 30350b Element 4227517 ×2
  • Tile Special 1 x 1 with Clip with Rounded Edges White Part 15712 Element 6348055 or 6054551 ×36
  • Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×6

Bricks Special 38 pieces

  • Brick Special 1 x 2 Palisade [aka Log] Tan Part 30136 Element 4218749 or 4114053 ×20
  • Brick Special 1 x 2 with Grille Tan Part 2877 Element 4655900 or 4278250 ×8
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×6
  • Brick Special 1 x 2 with 2 Studs on 1 Side White Part 11211 Element 6550150 or 6058177 ×4

Bars, Ladders and Fences 12 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 ×4
  • Bar 3L Light Bluish Gray Part 87994 Element 6093527 or 6064033 1 spare in the box ×1
  • Bar Holder with Hole and Bar Handle Medium Blue Part 23443 Element 6366178 or 6178242 ×4
  • Bar 4L (Lightsaber Blade / Wand) White Part 30374 Element 6116602 or 4129836 ×3

Tiles Round and Curved 11 pieces

  • Tile Round 1 x 1 Quarter Light Bluish Gray Part 25269 Element 6176433 1 spare in the box ×4
  • Tile Round 1 x 1 Olive Green Part 98138 Element 6284595 or 6047015 1 spare in the box ×3
  • Tile Round 1 x 1 Trans-Light Blue Part 98138 Element 6514192 or 6274739 1 spare in the box ×4

Technic Pins 9 pieces

  • Technic Pin with Friction Ridges Lengthwise with No Center Slots Black Part 61332 Element 6279875 1 spare in the box ×4
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×1
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×4

Bricks Curved 8 pieces

  • Brick Curved 2 x 2, Two Top Studs Light Bluish Gray Part 30165 Element 6150310 or 4182477 ×4
  • Brick Arch 1 x 3 Tan Part 4490 Element 4618651 or 4519915 ×4

Bricks Sloped 8 pieces

  • Brick Sloped 45° 2 x 1 Double / Inverted with Bottom Stud Holder Dark Bluish Gray Part 3049d Element 6174938 ×1
  • Brick Sloped 45° 2 x 1 Double with Inside Stud Holder Dark Bluish Gray Part 3044c Element 4226221 ×1
  • Brick Sloped 45° 2 x 1 Triple with Inside Stud Holder Dark Bluish Gray Part 15571 Element 6076203 ×1
  • Brick Sloped 75° 2 x 2 x 2 Quadruple Convex Dark Bluish Gray Part 3688 Element 4645099 ×3
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate White Part 61409 Element 6552142 or 6023804 ×2

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 with Solid Stud Pearl Gold Part 6141 Element 4523159 1 spare in the box ×5
  • Plate Round 1 x 1 with Open Stud White Part 85861 Element 6168642 or 4547649 1 spare in the box ×3

Tubes and Hoses 8 pieces

  • Axle Hose, Soft 7L Medium Blue Part 32580 Element 6178243 ×4
  • Hose Rigid 3mm D. 24L / 19.2cm White Part 75c24 Element 6178597 1 spare in the box ×4

Minifig Shields, Weapons, & Tools 5 pieces

  • Weapon Gun / Torch (Space) [No Grooves] Dark Bluish Gray Part 86208 Element 4566028 ×4
  • Weapon Spike Flexible 3.5L Light Bluish Gray Part 64727 Element 6270081 or 4616840 ×1

Technic Bricks 4 pieces

  • Technic Brick 1 x 1 with Pin Hole White Part 6541 Element 6609542 or 654101 ×4

Bricks 3 pieces

  • Brick 2 x 2 with Big Ben Clock Print Tan Part 3003pr0103 Element 6175701 ×1
  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2

Bricks Round and Cones 2 pieces

  • Cone 1 x 1 [Top Groove] Dark Bluish Gray Part 59900 Element 4529240 ×1
  • Brick Round 2 x 2 Dome Bottom [Open Stud] Flat Silver Part 15395 Element 6102756 ×1

Panels 2 pieces

  • Panel 1 x 1 x 1 Corner Tan Part 6231 Element 4612603 or 4568287 ×2

Technic Connectors 2 pieces

  • Technic Axle and Pin Connector Angled #3 - 157.5° White Part 32016 Element 6261390 or 6063767 ×2

Technic Steering, Suspension and Engine 2 pieces

  • Technic Wishbone Suspension Arm 9L White Part 32294 Element 6521395 or 6293820 ×2

Minifigs 1 piece

  • Minifig Trophy Statuette White Part 90398 Element 6551374 or 6299492 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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