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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.

Remote Controlled Road Crossing

Checking

7866 Remote Controlled Road Crossing

190 pieces in 58 part and color combinations, plus 1 minifigure.

LEGO counts 191 pieces. This inventory comes from a separate parts catalog and lists 194, including the 4 parts inside the minifigures; 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.

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Piece checklist

Light Gray 80 pieces

  • Baseplate 32 x 32 with 9-Stud Straight and Road Print Light Gray Part 606pr0001 ×1
  • Baseplate 8 x 16 Light Gray Part 3865 Element 4219739 or 4179592 ×1
  • Bracket 2 x 3 - 1 x 3 (Train Signal Stand) Light Gray Part 4169 Element 416902 ×2
  • Brick 1 x 1 Light Gray Part 3005 Element 300502 ×2
  • Brick 1 x 4 Light Gray Part 3010 Element 301002 ×1
  • Brick Sloped 10° 6 x 8 Light Gray Part 4515 Element 4186672 or 451552 ×4
  • Brick Sloped 45° 2 x 2 with Computer Panel Print Light Gray Part 3039pr9994 ×1
  • Brick Sloped 45° 2 x 2 with Computer Screen Print Light Gray Part 3039pr0026 ×1
  • Control Unit, Train 12V, 8 x 10 with Level Crossing Print Light Gray Part 4707c05 ×1
  • Control Unit, Train, 12V 4 x 8 x 1 2/3 Remote Control Switch Motor Light Gray Part 70026 Element 70026 ×2
  • Light Unit, Train 12V 4 x 4 x 1 2/3, Flash Light Gray Part upn0271 ×1
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×12
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×11
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×3
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×2
  • Plate 4 x 4 Light Gray Part 3031 Element 4243813 or 303102 ×1
  • Seat / Chair 2 x 2 Light Gray Part 4079 Element 407902 ×1
  • Technic Gear 14 Tooth Bevel Light Gray Part 4143 Element 414352 or 414302 ×4
  • Tile 1 x 8 with Groove Light Gray Part 4162 Element 416202 ×12
  • Train Track 12V Conducting Rail Straight Light Gray Part 3242 ×4
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1
  • Vehicle Track, Train, Slotted Rail Straight Light Gray Part 3228b Element 322802 ×8
  • Wire with 2-Prong Connectors, 12V / 4.5V 190L Light Gray Part 766c190 Element 73492 ×2
  • Wire with 2-Prong Connectors, 12V / 4.5V 96L Light Gray Part 766c96 Element 73493 ×2

Red 41 pieces

  • Brick 1 x 1 Red Part 3005 Element 300521 ×13
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 6 Red Part 3009 Element 300921 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×4
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×6
  • Plate 1 x 1 Red Part 3024 Element 302421 ×2
  • Plate 1 x 3 Red Part 3623 Element 362321 ×1
  • Plate 1 x 4 Red Part 3710 Element 371021 ×3
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 1 x 8 Red Part 3460 Element 346021 ×1
  • Plate 2 x 10 Red Part 3832 Element 383221 ×2
  • Plate 2 x 6 Red Part 3795 Element 379521 ×2
  • Plate 6 x 10 Red Part 3033 Element 6509008 or 6249097 ×1

Black 40 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×7
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×5
  • Light Brick 2 x 2 Type 2 12V with Red Diffusor Black Part 266bc02 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 4 x 8 Black Part 3035 Element 303526 ×2
  • Support 2 x 4 x 5 Stanchion Inclined [3mm wide posts] Black Part 4476a ×4
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×2
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Train 12V Level Crossing Sign with Red/White Print Black Part 512pr0001 ×2
  • Train Level Crossing Gate Type 2, Counterweight Black Part 70163 ×2
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×1

White 11 pieces

  • Door 1 x 4 x 5 Left with Trans-Clear Glass White Part 47899c01 ×1
  • Train Level Crossing Gate Type 2 with Red Stripes Print White Part 4512pr0001 ×2
  • Window 1 x 4 x 3 Train with All Studs Hollow White Part 4033 Element 403301 ×6
  • Window 4 x 4 x 3 Roof White Part 4447 Element 4522041 or 4248245 ×2

Dark Gray 10 pieces

  • Vehicle Track, Train, Sleeper Plate 2 x 8 with Cable Grooves Dark Gray Part 4166 Element 416627 ×10

Trans-Clear 8 pieces

  • Glass for Window 1 x 4 x 3 Trans-Clear Part 3855 Element 4556520 or 4203330 ×6
  • Glass for Window 4 x 4 x 3 Roof Trans-Clear Part 4448 Element 4522040 or 4161146 ×2

Minifigures 1 figure

  • Man - Blue Jacket, Blue Legs, Red Hat Minifigure, checked as a whole figure ×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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