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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.

Complete Train Set Without Motor

Checking

171 Complete Train Set Without Motor

147 pieces in 37 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

Black 67 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×10
  • Brick 1 x 2 Black Part 3004 Element 300426 ×1
  • Brick 1 x 4 with Bottom Tubes, Lowered Center Cross Support Black Part 3010a ×6
  • Brick 1 x 6 with Bottom Tubes and 2 Lowered Cross Supports Black Part 3009b ×5
  • Brick 1 x 8 with Bottom Tubes and 3 Lowered Cross Supports Black Part 3008b ×2
  • Brick 2 x 10 Black Part 3006 Element 4617860 or 300626 ×4
  • Brick 2 x 2 without Inside Ridges Black Part 3003a ×1
  • Brick 2 x 4 without Cross Supports Black Part 3001a ×1
  • Brick Round 1 x 1 Solid Stud Black Part 3062a ×5
  • Brick Sloped 45° 2 x 1 without Bottom Pin Black Part 3040a ×4
  • Brick Sloped 45° 2 x 3 Black Part 3038 Element 303826 ×2
  • Brick Sloped 45° 2 x 4 Black Part 3037 Element 303726 ×2
  • Brick Special 2 x 4 with Wheel Holder Old, Clear Bottom, Red Inside Black Part 7049bc01 ×2
  • Fence Gate 1 x 3 x 2 Black Part 3358 ×6
  • Fence Gate 1 x 3 x 2 Base Black Part 3359 ×6
  • Plate 1 x 2 Black Part 3023 Element 302326 ×1
  • Plate 2 x 2 Black Part 3022 Element 302226 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 4 x 6 Black Part 3032 Element 303226 ×2
  • Train Base 6 x 12 Type 1 with Wheels and Magnets [Complete Assembly] Black Part 270c02 ×3
  • Train Base 6 x 16 Old with Magnets Black Part 4178a ×1

Blue 48 pieces

  • Brick 1 x 1 Blue Part 3005 Element 300523 ×4
  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×8
  • Brick 1 x 4 with Bottom Tubes, Lowered Center Cross Support Blue Part 3010a ×2
  • Brick 1 x 6 with Bottom Tubes and 2 Lowered Cross Supports Blue Part 3009b ×2
  • Vehicle Track, Train, Tapered Rail Curved Inside Blue Part 3230a ×16
  • Vehicle Track, Train, Tapered Rail Curved Outside Blue Part 3229a ×16

White 17 pieces

  • Plate 2 x 2 White Part 3022 Element 6552099 or 6548260 ×1
  • Plate 2 x 8 White Part 3034 Element 6552101 or 303401 ×16

Red 10 pieces

  • Panel, Trapezoid, Tipper End Flat with Pins, 1 x 2 Anti-studs Red Part 3145 ×2
  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×1
  • Plate 2 x 8 Red Part 3034 Element 303421 ×1
  • Plate 4 x 8 Red Part 3035 Element 303521 ×2
  • Train Wheel Spoked for Wagon Red Part upn0383b ×4

Yellow 4 pieces

  • Brick 2 x 10 Yellow Part 3006 Element 6119276 or 6073100 ×2
  • Window 1 x 1 x 1 Classic with Short Sill, No Glass Yellow Part 3087c ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 171-1 [No Color/Any Color] Part 003439 ×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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