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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.

City House

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8403 City House

373 pieces in 127 part and color combinations, plus 3 minifigures.

LEGO counts 383 pieces. This inventory comes from a separate parts catalog and lists 385, including the 12 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.

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

White 95 pieces

  • Antenna 1 x 4 with Rounded Top White Part 3957a ×1
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×12
  • Brick 1 x 10 White Part 6111 Element 6619291 or 611101 ×1
  • Brick 1 x 16 White Part 2465 Element 6552092 or 246501 ×4
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×9
  • Brick 1 x 2 x 2 with Inside Stud Holder White Part 3245c Element 6550139 or 4113261 ×5
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×16
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×14
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×1
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×1
  • Brick Arch 1 x 3 x 2 White Part 88292 Element 4568956 ×4
  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside White Part 3307 Element 330701 ×1
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] White Part 3684 Element 4248055 or 4143976 ×3
  • Brick Sloped Inverted 34° 3 x 1 with Internal Stopper White Part 4287b ×2
  • Door 1 x 4 x 6 with 4 Panes and Stud Handle White Part 60623 Element 4521943 ×1
  • Fence Spindled 1 x 4 x 2 [2 Top Studs] White Part 30055 Element 4519360 or 4185653 ×4
  • Panel 1 x 6 x 5 White Part 59349 Element 6550180 or 4504228 ×5
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×2
  • Plate 2 x 10 White Part 3832 Element 6552109 or 383201 ×1
  • Plate 2 x 4 White Part 3020 Element 6552098 or 302001 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) White Part 4032a Element 6601914 or 403201 ×3
  • Tile 1 x 2 with Computer Keyboard Standard Print White Part 3069bpr0030 Element 4293350 ×1
  • Tile 1 x 2 with Mail Envelope, Letter, Address and Red Stamp Print White Part 3069bpr0099 Element 4521848 or 80170 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1

Dark Bluish Gray 79 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Dark Bluish Gray Part 48729b Element 6278155 or 4579234 2 spares in the box ×2
  • Brick Sloped 33° 2 x 2 Double Dark Bluish Gray Part 3300 Element 6446786 or 4523365 ×7
  • 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 with Bottom Pin Dark Bluish Gray Part 3040b Element 4211135 ×4
  • Brick Sloped 45° 2 x 2 Dark Bluish Gray Part 3039 Element 4211054 ×8
  • Brick Sloped 45° 2 x 4 Dark Bluish Gray Part 3037 Element 4211127 ×5
  • Brick Sloped 45° 2 x 8 Dark Bluish Gray Part 4445 Element 6227913 or 4210907 ×5
  • Hinge Plate 1 x 2 Locking with 1 Finger On Top Dark Bluish Gray Part 30383 Element 6265693 or 4210726 ×1
  • Plate 1 x 2 Dark Bluish Gray Part 3023 Element 4211063 ×8
  • Plate 1 x 4 Dark Bluish Gray Part 3710 Element 4211001 ×2
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×3
  • Plate 6 x 16 Dark Bluish Gray Part 3027 Element 4226358 ×3
  • Plate 6 x 8 Dark Bluish Gray Part 3036 Element 4210794 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Dark Bluish Gray Part 87580 Element 6126083 or 4565322 ×2
  • Tile 1 x 2 with Groove Dark Bluish Gray Part 3069b Element 4211052 ×7
  • Tile 1 x 6 with Groove Dark Bluish Gray Part 6636 Element 4210651 Also in Black ×12
  • Tile 2 x 2 with Computer Monitor, White Power Switch Icon Print Dark Bluish Gray Part 3068bpr0095 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×5

Light Bluish Gray 55 pieces

  • Bar 1 x 12 with 1 x 2 Plate End with Solid Studs and 1 x 1 Round Plate End Light Bluish Gray Part 42445 Element 6277023 or 4211759 ×1
  • Brick 1 x 1 Light Bluish Gray Part 3005 Element 4211389 ×16
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×8
  • Brick 1 x 6 Light Bluish Gray Part 3009 Element 4211393 ×4
  • Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×3
  • Cupboard 2 x 3 x 2 with Hollow Studs Light Bluish Gray Part 92410 Element 4610112 ×1
  • Hinge Brick 1 x 2 Base Light Bluish Gray Part 3937 Element 4211469 ×3
  • Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Light Bluish Gray Part 30552 Element 4211679 ×1
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Light Bluish Gray Part 44302a Element 4211804 ×2
  • Panel 1 x 4 x 1 with Rounded Corners [Thick Wall] Light Bluish Gray Part 43337 Element 4211769 ×2
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 2 spares in the box ×2
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Light Bluish Gray Part 3794b ×1
  • Plate Special 2 x 8 with Door Rail Light Bluish Gray Part 30586 Element 4222019 ×2
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×1
  • Tile 2 x 4 with Groove Light Bluish Gray Part 87079 Element 4560183 ×8

Black 44 pieces

  • Brick 1 x 2 Black Part 3004 Element 300426 ×2
  • Brick 1 x 6 Black Part 3009 Element 300926 ×1
  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×1
  • Brick Curved 1 x 4 x 1 1/3 No Studs, Lowered Inside Support Black Part 6191 Element 4200031 ×1
  • Brick Curved 3 x 1 No Studs Black Part 50950 Element 4251161 ×2
  • Brick Round 1 x 1 Open Stud Black Part 3062b Element 306226 ×4
  • Cupboard 2 x 3 x 2 Door Black Part 4533 Element 4193693 or 4129637 ×1
  • Equipment Frying Pan Black Part 4528 Element 452826 ×1
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Black Part 64644 Element 4538456 ×1
  • Fence Lattice 1 x 4 x 1 Black Part 3633 Element 4187209 or 363326 ×7
  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×3
  • Panel 1 x 1 x 1 Corner Black Part 6231 Element 4106347 or 4101709 ×2
  • Panel 1 x 2 x 1 [Square Corners] Black Part 4865a Element 486526 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×1
  • Tile 1 x 1 with Groove Black Part 3070b Element 307026 1 spare in the box ×4
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×2
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 Also in Dark Bluish Gray ×4
  • Tile 2 x 4 with Groove Black Part 87079 Element 4560182 ×2
  • Wheel Arch, Curved Wedge 4 x 3 with 2 x 2 Opening and 4 Studs Black Part 47755 Element 4525236 ×1
  • Wheel Skateboard / Trolley Black Part 2496 Element 6223673 or 4569104 ×2

Red 24 pieces

  • Box 2 x 2 x 2 Door with Slot Red Part 4346 Element 4521851 or 434621 ×1
  • Box 2 x 2 x 2 [Hollow Studs] Red Part 4345b Element 4261628 or 434571 ×1
  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×1
  • Brick Special 1 x 1 with Stud on 1 Side Red Part 87087 Element 4558886 ×1
  • Door Frame 1 x 4 x 6 Type 2 Red Part 60596 Element 6262946 or 4550015 ×1
  • Flag 4 x 1 Wavy [First Wave Right] Red Part 4495b Element 6268946 or 449521 ×1
  • Food Hot Dog / Sausage Red Part 33078 Element 6144805 or 4520952 ×1
  • Plant, Flower - Small Red Part 3742 1 spare in the box ×3
  • Plate 1 x 1 Red Part 3024 Element 302421 ×1
  • Plate Round 1 x 1 with Solid Stud Red Part 6141 Element 614121 1 spare in the box ×1
  • Plate Special 1 x 2 with Handle on End [Closed Ends] Red Part 60478 Element 4515365 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×2
  • Tile Special 2 x 3 with 2 Clips [Thick U Clips] Red Part 30350c ×1
  • Window 1 x 2 x 3 Flat Front Red Part 60593 Element 6468353 or 6132807 ×4
  • Window 1 x 4 x 6 Frame with 3 Panes Red Part 57894 Element 4503169 or 4298501 ×3

Blue 19 pieces

  • Brick 1 x 4 Blue Part 3010 Element 301023 ×1
  • Brick Curved 4 x 1 No Studs [Stud Holder with Asymmetric Ridges] Blue Part 61678 Element 4540048 ×10
  • Plate 1 x 10 Blue Part 4477 Element 447723 ×1
  • Plate 2 x 6 Blue Part 3795 Element 379523 ×1
  • Seat / Chair 2 x 2 with Center Sprue Mark Blue Part 4079b Element 407923 ×3
  • Sports Skateboard with Trolley Wheel Holders Blue Part 42511 Element 4569105 or 4172695 ×1
  • Tap 1 x 1 without Hole in Spout Blue Part 4599b Element 459923 ×1
  • Tile 2 x 2 with Groove Blue Part 3068b Element 306823 ×1

Green 10 pieces

  • Baseplate 16 x 32 Green Part 3857 Element 4219615 or 274828 ×1
  • Brick Round 1 x 1 Open Stud Green Part 3062b Element 306228 ×2
  • Dish 2 x 2 Inverted [Radar] Green Part 4740 Element 4567908 or 4239191 ×1
  • Plant, Flower Stem Green Part 3741 Element 6277589 or 374128 1 spare in the box ×1
  • Plant, Fruit Tree Green Part 3470 Element 347028 ×1
  • Plant, Leaves 4 x 3 Green Part 2423 Element 6268814 or 242328 ×3
  • Trash Can with 2 Cover Holders Green Part 2439 Element 243928 ×1

Reddish Brown 10 pieces

  • Animal, Dog / Wolf Reddish Brown Part 48812 Element 4261047 ×1
  • Brick Round 1 x 1 Open Stud Reddish Brown Part 3062b Element 4211183 ×2
  • Brick Special 1 x 2 Palisade [aka Log] Reddish Brown Part 30136 Element 4211180 ×4
  • Brick Special 1 x 4 Palisade [aka Log] Reddish Brown Part 30137 Element 4211181 ×2
  • Plate 4 x 4 Reddish Brown Part 3031 Element 4243838 or 4225868 ×1

Tan 10 pieces

  • Brick 2 x 2 Tan Part 3003 Element 4114306 or 300305 ×5
  • Plate 1 x 2 Tan Part 3023 Element 4113917 or 302305 ×4
  • Plate 2 x 6 Tan Part 3795 Element 4113993 or 379505 ×1

Trans-Clear 9 pieces

  • Equipment Goblet / Glass Trans-Clear Part 2343 Element 6166107 or 3000240 ×2
  • Glass for Window 1 x 2 x 3 Flat Front Trans-Clear Part 60602 Element 6581359 or 6252258 ×4
  • Glass for Window 1 x 4 x 6 Trans-Clear Part 57895 Element 6581671 or 6256058 ×3

Yellow 5 pieces

  • Brick Special 1 x 2 with Studs on 2 Sides Yellow Part 52107 Element 6289719 or 4557157 ×1
  • Dish 2 x 2 Inverted [Radar] Yellow Part 4740 Element 4169960 or 4107622 ×2
  • Equipment Cup / Mug [Plain] Yellow Part 3899 Element 389924 ×2

Trans-Orange 4 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×4

Dark Brown 3 pieces

  • Brick Arch 1 x 5 x 4 [Continuous Bow] Dark Brown Part 2339 Element 4518606 ×3

Trans-Yellow 3 pieces

  • Plate 1 x 2 Trans-Yellow Part 3023 Element 6514002 or 6240211 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 2 spares in the box ×2

Dark Orange 2 pieces

  • Plate 2 x 4 Dark Orange Part 3020 Element 4535928 or 4164449 ×2

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 8403-1 [No Color/Any Color] Part 91969 Element 4589551 ×1

Minifigures 3 figures

  • Man, Red Top with Dark Blue Arms, White Legs, Black Hair, Stubble Minifigure, checked as a whole figure ×1
  • Woman, White Vest with Stars, Green Legs, Black Hair Minifigure, checked as a whole figure ×1
  • Boy, White and Blue Hoodie, Short Light Bluish Gray Legs, Dark Orange Hair 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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