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.

Freight Train

Checking

7735 Freight Train

510 pieces in 124 part and color combinations, plus 2 minifigures.

LEGO counts 509 pieces. This inventory comes from a separate parts catalog and lists 518, including the 8 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.

Show

Piece checklist

Black 190 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×8
  • Brick Sloped 33° 3 x 2 Black Part 3298 Element 329826 ×3
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×2
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Black Part 3747a ×4
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×24
  • Fence Lattice 1 x 4 x 1 Black Part 3633 Element 4187209 or 363326 ×1
  • Hinge Plate 1 x 2 with 2 Fingers and Solid Studs Black Part 4276a ×2
  • Hinge Plate 1 x 2 with 3 Fingers [Solid Studs] Black Part 4275a ×2
  • Hinge Vehicle Roof 4 x 4 Black Part 4213 Element 421326 ×4
  • Hinge Vehicle Roof Holder 1 x 4 Black Part 4315 Element 4250225 or 431576 ×4
  • Magnet Cylindrical Black Part 73092 Element 73092 ×8
  • Motor, Train Base, 12V Slotted with 3-Hole Plugs Black Part 501c ×1
  • Plate 1 x 2 Black Part 3023 Element 302326 ×16
  • Plate 1 x 4 Black Part 3710 Element 371026 ×7
  • Plate 1 x 6 Black Part 3666 Element 366626 ×18
  • 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 ×9
  • Plate 2 x 6 Black Part 3795 Element 379526 ×12
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×2
  • Plate 6 x 16 Black Part 3027 Element 302726 ×3
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×2
  • Plate Special 1 x 2 with Ladder Black Part 4175 Element 6285241 or 6179557 ×4
  • Plate Special 1 x 8 with Door Rail Black Part 4510 Element 4286009 or 451026 ×2
  • Plate Special 6 x 16 with Motor Opening Wide Black Part 3058b Element 4159871 ×1
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×1
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×6
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×3
  • Tool Hammer / Mallet Large Black Part 4522 Element 452226 ×1
  • Tool Screwdriver and Spanner / Wrench Black Part 4006 Element 6034000 or 4569095 ×1
  • Train Buffer Beam Black Part 4022 Element 4109853 or 402276 ×8
  • Train Coupling Black Part 4023 ×8
  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×8
  • 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 ×6

Light Gray 102 pieces

  • Bar 1 x 4 x 2 with Studs Light Gray Part 4083 Element 408302 ×2
  • Brick Sloped 33° 6 x 6 Double (Train Roof) Light Gray Part 4509 Element 4201555 or 450902 ×3
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Gray Part 3040b Element 4121933 or 304002 ×4
  • Fence Lattice 1 x 4 x 1 Light Gray Part 3633 Element 4207300 or 363302 ×3
  • Lever Small Base with Black Lever Light Gray Part 298c02 Element 73588 ×2
  • Minifig Hose Nozzle Simple with 8L Black String Light Gray Part 194c01 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×1
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×1
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×2
  • Plate 4 x 6 Light Gray Part 3032 Element 303202 ×1
  • Plate 6 x 10 Light Gray Part 3033 Element 303302 ×3
  • Plate Special 1 x 1 with Clip Vertical [Thin Open O Clip] Light Gray Part 4085a ×2
  • Plate Special 1 x 2 with Ladder Light Gray Part 4175 Element 4100526 or 417502 ×3
  • Plate Special 2 x 2 with Wheel Holders Light Gray Part 4600 Element 460002 ×2
  • Technic Bush 1/2 Toothed Type I [+ Opening] Light Gray Part 4265a Element 426502 ×1
  • Technic Wedge Belt Wheel [aka Pulley] Light Gray Part 4185 Element 4100502 or 418502 ×1
  • Tile 2 x 2 with Groove Light Gray Part 3068b Element 306802 ×3
  • Train Motor 12V Connecting Rod Light Gray Part 502 ×2
  • Train Track 12V Conducting Rail Curved [Cable Connection Holes] Light Gray Part 3241 ×15
  • Train Track 12V Conducting Rail Curved with Connection Wire and Long Connector Light Gray Part 2731b ×1
  • Train Track 12V Conducting Rail Straight Light Gray Part 3242 ×2
  • Tyre for Train Wheel for Electric Train Motor 12V Light Gray Part 458 ×6
  • Vehicle Track, Train, Slotted Rail Curved Inside Light Gray Part 3230b ×16
  • Vehicle Track, Train, Slotted Rail Curved Outside Light Gray Part 3229b ×16
  • Vehicle Track, Train, Slotted Rail Straight Light Gray Part 3228b Element 322802 ×4
  • Wheel 8 x 6 Light Gray Part 4624 Element 462402 ×4

Red 78 pieces

  • Bar 1 x 4 x 2 with Studs Red Part 4083 Element 6001207 or 4550383 ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×8
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×2
  • Brick 1 x 2 with Black Grill Print Red Part 3004pr9981 ×6
  • Brick 1 x 4 Red Part 3010 Element 301021 ×6
  • Brick 1 x 6 Red Part 3009 Element 300921 ×4
  • Brick 2 x 2 Red Part 3003 Element 4103590 or 300371 ×2
  • Brick Arch 1 x 4 Red Part 3659 Element 365921 ×1
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×8
  • Brick Special 2 x 6 x 2 Weight with Bottom Openings and Center Seams on Ends Red Part 73090a ×2
  • Fence Lattice 1 x 4 x 1 Red Part 3633 Element 4187280 or 363321 ×12
  • Plate 1 x 2 Red Part 3023 Element 302321 ×5
  • Plate 1 x 4 Red Part 3710 Element 371021 ×7
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 1 x 8 Red Part 3460 Element 346021 ×2
  • Plate 2 x 4 Red Part 3020 Element 302021 ×2
  • Plate Special 1 x 2 with Ladder Red Part 4175 Element 6285246 or 6179575 ×4
  • Wheel Centre Small with Stub Axles (Pulley Wheel) Red Part 3464 Element 4180583 or 346421 ×4

Yellow 67 pieces

  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×6
  • Brick 1 x 2 with Black Grill Print Yellow Part 3004pr9981 ×1
  • Brick 1 x 3 Yellow Part 3622 Element 362224 ×2
  • Brick 1 x 4 Yellow Part 3010 Element 301024 ×6
  • Brick 1 x 6 Yellow Part 3009 Element 300924 ×7
  • Brick 2 x 2 Yellow Part 3003 Element 4103588 or 300374 ×2
  • Brick 2 x 3 Yellow Part 3002 Element 300224 ×1
  • Brick Sloped 33° 3 x 4 Yellow Part 3297 Element 6256980 or 6088712 ×1
  • Brick Sloped 45° 2 x 4 Yellow Part 3037 Element 4219911 or 303724 ×1
  • Brick Sloped Inverted 45° 2 x 1 Yellow Part 3665 Element 366524 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Yellow Part 3660 Element 366024 ×4
  • Brick Special 1 x 1 with Headlight Yellow Part 4070 Element 407024 ×2
  • Door 1 x 4 x 5 Train Left Yellow Part 4181 Element 418124 ×1
  • Door 1 x 4 x 5 Train Left with Red Bottom Half Print Yellow Part 4181pr0002 ×1
  • Door 1 x 4 x 5 Train Right Yellow Part 4182 Element 6071242 or 418224 ×1
  • Door 1 x 4 x 5 Train Right with Red Bottom Half Print Yellow Part 4182pr0002 ×1
  • Door Sliding - Type 1 Yellow Part 4511 ×2
  • Plate 1 x 2 Yellow Part 3023 Element 302324 ×6
  • Plate 1 x 4 Yellow Part 3710 Element 371024 ×4
  • Plate 1 x 6 Yellow Part 3666 Element 366624 ×2
  • Plate 1 x 8 Yellow Part 3460 Element 346024 ×2
  • Plate 2 x 4 Yellow Part 3020 Element 302024 ×1
  • Plate Special 1 x 8 with Door Rail Yellow Part 4510 Element 451024 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Yellow Part 3829c01 Element 9553 ×1
  • Tile 1 x 1 with Black '2' Print Yellow Part 3070bpr0027 Element 4140747 ×2
  • Tile 1 x 1 with Black '3' Print Yellow Part 3070bpr0028 Element 80403 ×2
  • Wheel Arch, Mudguard 2 x 4 [Smooth] Yellow Part 3787 ×2
  • Window 1 x 4 x 3 Train with All Studs Hollow Yellow Part 4033 Element 4264949 or 4111855 ×2

Dark Gray 36 pieces

  • Vehicle Track, Train, Sleeper Plate 2 x 8 with Cable Grooves Dark Gray Part 4166 Element 416627 ×36

Trans-Clear 14 pieces

  • Glass for Train Door Lip On Top and Bottom Trans-Clear Part 4183 Element 418340 ×4
  • Glass for Train Window 1 x 4 x 3 Trans-Clear Part 4034 Element 403440 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 ×6
  • Windscreen 2 x 6 x 2, Wide Top Trans-Clear Part 4176 Element 4502193 or 4179426 ×2

White 14 pieces

  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×3
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×2
  • Brick Sloped 45° 2 x 4 White Part 3037 Element 6552102 or 303701 ×2
  • Brick Special 1 x 1 with Headlight White Part 4070 Element 6548267 or 407001 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] White Part 3700 Element 6619284 or 370001 ×2
  • Tile Round 2 x 2 with Bottom Cross White Part 4150 Element 415051 or 415001 ×2
  • Vehicle Base, Motorcycle Chassis, Frame 3 x 6 x 3 White Part 4480c01 ×1

Trans-Red 6 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×6

[No Color/Any Color] 2 pieces

  • Activity Card, Train Track Layout Template 1:13 Scale for 4.5V & 12V, 159mm x 134mm, with Lego logo [No Color/Any Color] Part 196926 1 spare in the box ×1
  • Sticker Sheet for Set 7735-1 [No Color/Any Color] Part 196945 ×1

Blue 1 piece

  • Vehicle Base, Motorcycle Chassis, Frame 3 x 6 x 3 Blue Part 4480c01 ×1

Minifigures 2 figures

  • Man - Blue Jacket, Blue Legs, Red Hat Minifigure, checked as a whole figure ×1
  • Shell - White Torso with Logo, Blue Legs, Red Cap 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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy