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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.

Cloud City

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10123 Cloud City

677 pieces in 184 part and color combinations, plus 7 minifigures.

LEGO counts 698 pieces. This inventory comes from a separate parts catalog and lists 707, including the 30 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

Dark Gray 203 pieces

  • Bar 1 x 8 with Brick 1 x 2 Curved Top End (Axle Holder Inside Small End) Dark Gray Part 30359b Element 4164069 ×1
  • Brick 1 x 1 Dark Gray Part 3005 Element 4114079 or 300527 ×12
  • Brick 1 x 10 Dark Gray Part 6111 Element 4114327 or 611127 ×4
  • Brick 1 x 2 Dark Gray Part 3004 Element 4113909 or 300427 ×1
  • Brick 1 x 2 x 5 with Blocked Open Studs and Bottom Stud Holder with Asymmetric Ridges Dark Gray Part 2454a Element 4113235 or 245427 ×17
  • Brick 1 x 4 Dark Gray Part 3010 Element 4114308 or 301027 ×6
  • Brick 1 x 6 Dark Gray Part 3009 Element 4114082 or 300927 ×1
  • Brick 2 x 2 Dark Gray Part 3003 Element 4110008 or 300327 ×6
  • Brick 2 x 8 Dark Gray Part 3007 Element 4116649 or 300727 ×2
  • Brick 8 x 16 Dark Gray Part 4204 Element 4181114 or 4118869 ×5
  • Brick 8 x 8 Dark Gray Part 4201 Element 4181131 or 4118868 ×1
  • Brick Arch 1 x 4 Dark Gray Part 3659 Element 365927 ×6
  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Dark Gray Part 3307 Element 4218967 or 4114517 ×1
  • Brick Sloped 18° 4 x 2 Dark Gray Part 30363 Element 4124098 ×7
  • Brick Sloped 33° 3 x 1 Dark Gray Part 4286 Element 4108045 or 428627 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Dark Gray Part 3040b Element 4121970 or 4109985 ×4
  • Brick Sloped 45° 2 x 2 Dark Gray Part 3039 Element 4109984 ×1
  • Brick Sloped 45° 2 x 2 with Red Square and Circuitry Print Dark Gray Part 3039pr9974 Element 4219577 or 4110064 ×1
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Dark Gray Part 3747a Element 4112039 ×2
  • Brick Special 1 x 2 with Pin Dark Gray Part 2458 Element 4113907 or 245827 ×8
  • Brick Special 1 x 4 with 4 Studs on One Side Dark Gray Part 30414 Element 4144532 ×2
  • Brick Special 2 x 2 with 2 Pins and Axle Hole Dark Gray Part 30000 Element 3000027 ×1
  • Brick Special 2 x 2 with Pin and Axle Hole Dark Gray Part 6232 Element 4108048 ×6
  • Chain 17L [21 Links] Dark Gray Part 30104 Element 4106728 ×1
  • Plate 1 x 2 Dark Gray Part 3023 Element 4111983 or 302327 ×3
  • Plate 1 x 4 Dark Gray Part 3710 Element 371027 ×8
  • Plate 2 x 2 Dark Gray Part 3022 Element 4114003 or 302227 ×36
  • Plate 2 x 4 Dark Gray Part 3020 Element 4112232 or 302027 ×4
  • Plate 4 x 4 Dark Gray Part 3031 Element 4243823 or 4113911 ×5
  • Plate 6 x 6 Dark Gray Part 3958 Element 4121924 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Gray Part 4032a Element 4107763 or 403227 ×1
  • Plate Special 2 x 4 with Pins Dark Gray Part 30157 Element 4141978 or 4114127 ×1
  • Plate Special 3 x 2 with Rounded End, Hole Dark Gray Part 3176 Element 4219468 or 4133505 ×1
  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Dark Gray Part 3940b Element 4114514 or 394027 ×1
  • Technic Brick 1 x 2 [1 Pin Hole] Dark Gray Part 3700 Element 4114529 or 370027 ×10
  • Tile 1 x 4 with Groove Dark Gray Part 2431 Element 4109979 ×8
  • Tile 1 x 6 with Groove Dark Gray Part 6636 Element 4129575 or 4108155 ×6
  • Tile 1 x 8 with Groove Dark Gray Part 4162 Element 416227 ×8
  • Tile 2 x 2 with Groove Dark Gray Part 3068b Element 4109986 or 306827 ×10

Light Gray 134 pieces

  • Antenna 1 x 4 with Rounded Top Light Gray Part 3957a Element 395702 ×2
  • Bracket 1 x 2 - 2 x 2 Light Gray Part 44728 Element 4297346 or 4185274 ×4
  • Brick 1 x 1 x 5 with Blocked Open or Hollow Stud Light Gray Part 2453a ×2
  • Brick 1 x 10 Light Gray Part 6111 Element 611102 ×2
  • Brick 1 x 2 Light Gray Part 3004 Element 300402 ×4
  • Brick 1 x 2 x 2 with Inside Axle Holder Light Gray Part 3245b Element 4107533 ×2
  • Brick 1 x 3 Light Gray Part 3622 Element 362202 ×4
  • Brick 2 x 2 Corner Light Gray Part 2357 Element 235752 or 235702 ×2
  • Brick 2 x 4 Light Gray Part 3001 Element 4116259 or 300102 ×5
  • Brick 4 x 6 Light Gray Part 2356 Element 4190379 or 4181123 ×7
  • Brick Round 2 x 2 with Axle Hole Light Gray Part 3941 Element 614302 or 394102 ×1
  • Brick Round Corner 16 x 16 Light Gray Part 33230 Element 4214931 ×4
  • Brick Round Corner 4 x 4 Full Brick Light Gray Part 2577 Element 4159736 or 257702 ×2
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×1
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Light Gray Part 4460a Element 446002 ×4
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Light Gray Part 3684 Element 4248057 or 4143978 ×6
  • Brick Sloped Inverted 45° 2 x 1 Light Gray Part 3665 Element 366502 ×8
  • Brick Special 1 x 2 with Handle Light Gray Part 30236 Element 4113203 ×4
  • Brick Wedged, Angled 4 x 2 Left Light Gray Part 41768 Element 4160344 ×1
  • Brick Wedged, Angled 4 x 2 Right Light Gray Part 41767 Element 4160326 ×1
  • Cone 1 x 1 [No Top Groove] Light Gray Part 4589 Element 458902 ×1
  • Hinge Brick 1 x 2 Base Light Gray Part 3937 Element 393702 ×1
  • Hose Rigid 3mm D. 20L / 16cm Light Gray Part 75c20 Element 4219564 ×1
  • Hose Rigid 3mm D. 9L / 7.2cm Light Gray Part 75c09 Element 4224200 or 4141258 1 spare in the box ×2
  • Panel 1 x 2 x 1 [Square Corners] Light Gray Part 4865a Element 486502 ×1
  • Panel 1 x 4 x 1 with Rounded Corners [Thick Wall] Light Gray Part 43337 Element 4171667 or 4140812 ×1
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×2
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×4
  • Plate Round 1 x 1 with Solid Stud Light Gray Part 6141 Element 614102 3 spares in the box ×11
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Gray Part 4032a Element 403202 ×3
  • Plate Special 1 x 2 Side Handle [Free Ends] Light Gray Part 2540 Element 4140584 or 254052 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Light Gray Part 3794a Element 379402 ×1
  • Plate Special 1 x 2 with Door Rail Light Gray Part 32028 Element 4109642 ×2
  • Support 2 x 2 x 8 with Grooves, Smooth On All Sides, Top Peg Light Gray Part 30646b Element 4220070 ×1
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Light Gray Part 6553 Element 655302 ×2
  • Technic Axle 3 Light Gray Part 4519 Element 4186007 ×2
  • Technic Brick 1 x 2 [2 Pin Holes] Light Gray Part 32000 Element 3200002 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×6
  • Technic Brick 4 x 4 with 2 x 2 Opening Light Gray Part 32324 Element 4141499 ×1
  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×2
  • Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Light Gray Part 32269 Element 4141455 ×1
  • Technic Pin without Friction Ridges Lengthwise Light Gray Part 3673 Element 4184166 or 367302 1 spare in the box ×1
  • Technic Steering Wheel Small (3 Studs Diameter) Light Gray Part 2819 Element 4113032 or 281902 ×1
  • Tile 1 x 2 with Stylised Computer Console Print Light Gray Part 3069bpr0086 Element 4124164 ×1
  • Tile 1 x 4 with Groove Light Gray Part 2431 Element 243102 ×1
  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Gray Part 4150pr0022 Element 4140520 ×2
  • Tile Special 1 x 1 with Clip and Straight Tips Light Gray Part 2555 Element 255502 ×8
  • Tile Special 1 x 2 with Handle Light Gray Part 2432 Element 243202 ×1
  • Tile Special 2 x 2 with Bar and Stud Light Gray Part 30256 Element 4116842 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×1

Black 121 pieces

  • Bar 1 x 8 with Brick 1 x 2 Curved Top End (Axle Holder Inside Small End) Black Part 30359b Element 4164067 ×2
  • Brick 1 x 12 Black Part 6112 Element 611226 ×2
  • Brick 1 x 2 Black Part 3004 Element 300426 ×10
  • Brick 1 x 2 x 5 with Han Solo in Carbonite Print Black Part 2454apr0003 Element 4188306 or 4129537 ×1
  • Brick 1 x 3 Black Part 3622 Element 362226 ×2
  • Brick 1 x 4 Black Part 3010 Element 301026 ×2
  • Brick 1 x 6 x 5 Black Part 3754 Element 4218987 or 4109734 ×1
  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×9
  • Brick 2 x 3 Black Part 3002 Element 300226 ×1
  • Brick 2 x 4 Black Part 3001 Element 300126 ×7
  • Brick 2 x 6 Black Part 2456 Element 4181144 or 245626 ×2
  • Brick 2 x 8 Black Part 3007 Element 6037390 or 300726 ×14
  • Brick Arch 1 x 8 x 2 Black Part 3308 Element 4218982 or 4159141 ×2
  • Brick Sloped 45° 2 x 1 Triple with Ovoid Bottom Pin Black Part 3048c Element 304826 ×4
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Black Part 3684 Element 4286874 or 4248065 ×6
  • Brick Sloped Inverted 75° 2 x 1 x 3 Black Part 2449 Element 4636202 or 4561789 ×1
  • Brick Special 1 x 4 with Groove Black Part 2653 Element 265326 ×6
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×4
  • Hinge Brick 2 x 2 Top Plate Thin Black Part 6134 Element 4124096 or 613426 ×1
  • Lever Small Base with Black Lever Black Part 298c02 Element 73587 1 spare in the box ×1
  • Plate 1 x 4 Black Part 3710 Element 371026 ×3
  • Plate 1 x 8 Black Part 3460 Element 346026 ×2
  • Plate 2 x 12 Black Part 2445 Element 244526 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×3
  • Plate 4 x 10 Black Part 3030 Element 303076 or 303026 ×2
  • Plate 4 x 6 Black Part 3032 Element 303226 ×2
  • Plate 6 x 6 Black Part 3958 Element 395826 ×1
  • String with End Studs 41L Overall Black Part 14226c41 Element 6096957 or 6074034 ×1
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Brick 4 x 6 with 2 x 4 Opening Black Part 32531 Element 6456527 or 4162508 ×1
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×4
  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×1
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×7
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×1
  • Tile Round 2 x 2 with Grey and Black Machinery Print Black Part 4150pr0036 Element 4219550 or 4140518 ×2
  • Tile Special 1 x 1 with Clip and Straight Tips Black Part 2555 Element 255526 ×8
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×1

Tan 66 pieces

  • Brick Arch 1 x 6 x 2 - Thick Top with Reinforced Underside Tan Part 3307 Element 4114073 or 330705 ×1
  • Brick Round 1 x 1 Open Stud Tan Part 3062b Element 4117070 or 306205 ×11
  • Brick Special 1 x 2 Palisade [aka Log] Tan Part 30136 Element 4218749 or 4114053 ×21
  • Brick Special 1 x 4 Palisade [aka Log] Tan Part 30137 Element 6468819 or 4523148 ×2
  • Plate 1 x 3 Tan Part 3623 Element 4121921 or 362305 ×1
  • Plate 6 x 12 Tan Part 3028 Element 6185313 or 6097342 ×1
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Tan Part 4032a Element 4140562 or 403205 ×5
  • Plate Special 1 x 2 Side Handle [Free Ends] Tan Part 2540 Element 4140593 or 4125271 ×1
  • Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2
  • Technic Brick 1 x 1 with Pin Hole Tan Part 6541 Element 4179771 or 654105 ×3
  • Tile 1 x 6 with Groove Tan Part 6636 Element 4157277 or 4108151 ×12
  • Tile 1 x 8 with Groove Tan Part 4162 Element 4544139 or 4519964 ×4
  • Tile 2 x 2 with Groove Tan Part 3068b Element 4185177 or 4114002 ×2

White 53 pieces

  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×3
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×4
  • Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×5
  • Brick 2 x 2 Corner White Part 2357 Element 6552088 or 6548253 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×2
  • Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×1
  • Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole White Part 6222 Element 6615542 or 4203583 ×1
  • Brick Sloped 33° 3 x 1 White Part 4286 Element 6632142 or 428601 ×2
  • Brick Sloped 75° 2 x 1 x 3 with Open Stud White Part 4460a ×1
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] White Part 3684 Element 4248055 or 4143976 ×3
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] White Part 3660 Element 366001 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side White Part 30414 Element 6550167 or 4143254 ×3
  • Plate 2 x 3 White Part 3021 Element 6550136 or 302101 ×1
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] White Part 2654 Element 6601843 or 6552259 ×1
  • Seat / Chair 2 x 2 White Part 4079 ×4
  • Technic Worm Gear White Part 4716 Element 4219172 or 4140502 ×4
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×2
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×1
  • Tile 1 x 8 with Groove White Part 4162 Element 6552110 or 416201 ×2
  • Tile Round 2 x 2 with Bottom Cross White Part 4150 Element 415051 or 415001 ×6
  • Turntable 4 x 4 Locking Grooved Base White Part 30516 Element 4219466 ×1
  • Turntable 4 x 4 Top, Locking White Part 30658 Element 4545335 or 4143673 ×1

Trans-Neon Orange 34 pieces

  • Antenna 1 x 4 with Rounded Top Trans-Neon Orange Part 3957a Element 4560958 or 4129565 ×8
  • Brick 1 x 4 without Bottom Tubes Trans-Neon Orange Part 3066 Element 4219576 or 4153468 ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Orange Part 6141 Element 6240218 or 3005747 2 spares in the box ×12
  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Neon Orange Part 2412b Element 6250159 or 6124829 ×10

Trans-Neon Green 30 pieces

  • Brick Round 1 x 1 Open Stud Trans-Neon Green Part 3062b Element 6514237 or 6238675 ×8
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Green Part 6141 Element 6240223 or 3005749 2 spares in the box ×22

Trans-Red 16 pieces

  • Bar 4L (Lightsaber Blade / Wand) Trans-Red Part 30374 Element 6507880 or 6167284 ×1
  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×4
  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Red Part 2412b Element 6250158 or 4190187 ×9

Blue 4 pieces

  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×1
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×3

Trans-Clear 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Clear Part 3065 Element 6514262 or 6244904 ×2
  • Brick Round 1 x 1 Open Stud Trans-Clear Part 3062b Element 6514232 or 6223655 ×2

Yellow 4 pieces

  • Plate Special 1 x 2 with Door Rail Yellow Part 32028 Element 4141630 ×4

Trans-Light Blue 3 pieces

  • Bar 4L (Lightsaber Blade / Wand) Trans-Light Blue Part 30374 Element 6507882 or 6170187 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×2

Brown 2 pieces

  • Plant, Flower Stem Brown Part 3741 Element 4218968 1 spare in the box ×2

Chrome Silver 2 pieces

  • Weapon Lightsaber Hilt without Bottom Ring Chrome Silver Part 23306 Element 4124050 ×2

Trans-Brown 1 piece

  • Windscreen 3 x 6 x 5 Bubble with Studs on Top with Octagonal Light Gray Lines Print Trans-Brown Part 30366pr0001 ×1

Minifigures 7 figures

  • Han Solo, Black Vest, Yellow Skin, Brown Legs Minifigure, checked as a whole figure ×1
  • Darth Vader, Light Gray Skin Minifigure, checked as a whole figure ×1
  • Stormtrooper, Plain Yellow Head, Black Hips Minifigure, checked as a whole figure ×1
  • Boba Fett, Helmet and Jetpack, Light Gray Armor, Printed Legs Minifigure, checked as a whole figure ×1
  • Lando Calrissian, Yellow and Blue Cape (3626b Head) Minifigure, checked as a whole figure ×1
  • Luke Skywalker, Cloud City Outfit, Yellow Skin, Tan Shirt Minifigure, checked as a whole figure ×1
  • Princess Leia, Cloud City Outfit, Yellow Skin, Dark Orange Shirt 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.

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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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