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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.

Electric Passenger Train

Checking

7725 Electric Passenger Train

489 pieces in 65 part and color combinations, plus 1 minifigure.

LEGO counts 485 pieces. This inventory comes from a separate parts catalog and lists 493, 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

Bricks 110 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×12
  • Brick 1 x 2 Black Part 3004 Element 300426 ×20
  • Brick 1 x 4 Black Part 3010 Element 301026 ×4
  • Brick 1 x 1 Red Part 3005 Element 300521 ×24
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×16
  • 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 ×8
  • Brick 2 x 2 without Inside Ridges Red Part 3003a ×8

Plates 99 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×19
  • Plate 1 x 4 Black Part 3710 Element 371026 ×4
  • Plate 1 x 6 Black Part 3666 Element 366626 ×6
  • Plate 1 x 8 Black Part 3460 Element 346026 ×2
  • Plate 2 x 10 Black Part 3832 Element 383226 ×3
  • Plate 2 x 2 Black Part 3022 Element 302226 ×21
  • Plate 2 x 4 Black Part 3020 Element 302026 ×11
  • Plate 2 x 6 Black Part 3795 Element 379526 ×2
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×4
  • Plate 6 x 16 Black Part 3027 Element 302726 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×10
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×8
  • Plate 1 x 4 Red Part 3710 Element 371021 ×2
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 4 x 12 Red Part 3029 Element 4514717 or 302921 ×3

Transportation - Land 78 pieces

  • Train Buffer Beam Black Part 4022 Element 4109853 or 402276 ×4
  • Vehicle Base, Train 6 x 16 Black Part 4178 ×1
  • Train Track Sleeper Plate 2 x 8 without Cable Grooves Dark Gray Part 767 ×32
  • Vehicle Track, Train, Slotted Rail Curved Inside Light Gray Part 3230b ×16
  • Vehicle Track, Train, Slotted Rail Curved Outside Light Gray Part 3229b ×16
  • Seat / Chair 2 x 2 Yellow Part 4079 ×9

Bricks Sloped 60 pieces

  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×8
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×12
  • Brick Sloped 45° 2 x 2 with Computer Panel Print Blue Part 3039pr9994 ×2
  • Brick Sloped 45° 2 x 2 with Computer Screen Print Blue Part 3039pr0026 Element 4190885 ×2
  • Brick Sloped 33° 3 x 3 Light Gray Part 4161 Element 4212439 or 416102 ×4
  • Brick Sloped 33° 3 x 4 Light Gray Part 3297 Element 329702 ×16
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×4
  • Brick Sloped 33° 3 x 3 Double Convex Red Part 3675 Element 367521 ×4
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×4

Windows and Doors 44 pieces

  • Door 1 x 4 x 5 Train Left Red Part 4181 Element 4502192 or 4100372 ×3
  • Door 1 x 4 x 5 Train Right Red Part 4182 Element 6219679 or 4297084 ×3
  • Window 1 x 2 x 3 Train Red Part 4035 Element 4114302 ×4
  • Window 1 x 4 x 3 Train with All Studs Hollow Red Part 4033 Element 4100371 ×12
  • Glass for Train Door Lip On Top and Bottom Trans-Clear Part 4183 Element 418340 ×6
  • Glass for Train Window 1 x 2 x 3 Trans-Clear Part 4036 Element 403640 ×4
  • Glass for Train Window 1 x 4 x 3 Trans-Clear Part 4034 Element 403440 ×12

Plates Round Curved and Dishes 19 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Gray Part 4032a Element 403202 ×7
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×8
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×4

Electronics 17 pieces

  • Motor, Train Base, 12V Modern Type I with 2 round contact holes Black Part 501a ×1
  • Train Track 12V Conducting Rail Curved [Cable Connection Holes] Light Gray Part 3241 ×15
  • Train Track 12V Conducting Rail Curved with Connection Wire and Short Connector Light Gray Part 2731a ×1

Tiles 16 pieces

  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×6
  • Tile 1 x 8 with Groove Red Part 4162 Element 416221 ×10

Bricks Special 14 pieces

  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×12
  • Brick Special 2 x 6 x 2 Weight with Bottom Openings and Center Seams on Ends Red Part 73090a ×2

Wheels and Tyres 13 pieces

  • Wheel Train for 12V Electric Motor Black Part 867 ×2
  • Wheels Train Spoked Small (23mm D.) and Black Brick, Modified 2 x 4 [Black] Black Part 4180c01 ×5
  • Tyre for Train Wheel for Electric Train Motor 12V Light Gray Part 458 ×6

Magnets and Holders 12 pieces

  • Magnet Cylindrical Black Part 73092 Element 73092 ×6
  • Train Coupling Black Part 4023 ×6

Plates Special 4 pieces

  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×4

Windscreens and Fuselage 2 pieces

  • Windscreen 2 x 6 x 2, Wide Top Trans-Clear Part 4176 Element 4502193 or 4179426 ×2

Stickers 1 piece

  • Sticker Sheet for Set 7725-1 [No Color/Any Color] Part 193075 Element 193075 ×1

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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