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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.

Robo Stalker

Checking

2153 Robo Stalker

268 pieces in 97 part and color combinations, plus 2 minifigures.

The piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. 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

Black 135 pieces

  • Box 2 x 2 x 2 [Hollow Studs] Black Part 4345b Element 6138634 or 4143247 ×2
  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×1
  • Brick Arch 1 x 8 x 2 Black Part 3308 Element 4218982 or 4159141 ×2
  • Brick Sloped 33° 3 x 2 with RoboForce Gold 'ROBO' and Blue and Yellow Circuitry Print Black Part 3298pr0034 Element 4109742 ×2
  • Brick Sloped 45° 2 x 2 Black Part 3039 Element 303926 ×6
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×4
  • Brick Sloped Inverted 75° 2 x 1 x 3 Black Part 2449 Element 4636202 or 4561789 ×4
  • Brick Special 1 x 2 with Grille Black Part 2877 Element 287726 ×7
  • Brick Special 1 x 2 x 2/3 with Studs on Sides Black Part 4595 Element 6681661 or 4523339 ×1
  • Brick Wedged, Sloped 4 x 4 Triple, No Stud Notches Black Part 6069 Element 606926 ×2
  • Brick Wedged, Sloped 4 x 4 Triple, No Stud Notches with Metallic Roboforce Print Black Part 6069pr0002 Element 4109743 ×2
  • Brick Wedged, Sloped 45° 6 x 6 Double / 33° [Train Roof End] Black Part 2876 Element 6016300 or 4163768 ×1
  • Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°] Black Part 4285b Element 6603362 or 4509865 ×1
  • Equipment Camera with Side Sight [aka Space Gun] Black Part 4360 Element 436026 ×1
  • Hinge Bar 2.5L with 2 and 3 Fingers on Ends (Pantograph Shoe Holder) Black Part 2923 Element 292326 ×3
  • Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs] Black Part 4275b Element 427526 ×10
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Black Part 73983 Element 6102782 or 74011 ×4
  • Hinge Tile 1 x 2 1/2 with 2 Fingers on Top Black Part 4531 Element 453126 ×3
  • Hinge Vehicle Roof 4 x 4 Black Part 4213 Element 421326 ×1
  • Lever Small Base with Light Gray Lever Black Part 298c03 Element 73667 ×2
  • Lever Small Base with Yellow Lever Black Part 298c01 Element 74138 ×4
  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×6
  • Plate 1 x 6 Black Part 3666 Element 366626 ×2
  • Plate 1 x 8 Black Part 3460 Element 346026 ×5
  • Plate 2 x 10 Black Part 3832 Element 383226 ×2
  • Plate 2 x 2 Black Part 3022 Element 302226 ×2
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×4
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 4 Black Part 3020 Element 302026 ×4
  • Plate 2 x 6 Black Part 3795 Element 379526 ×2
  • Plate Special 1 x 2 with Handles [Flat Ends / Low Attachment] Black Part 3839b Element 383926 ×3
  • Support Round 2 x 2 x 2 Stand with Reach-Through Center Hole Black Part 3940b Element 394026 ×1
  • Technic Slope Long 1 x 6 with 3 Pin Holes Black Part 2744 Element 6311889 or 274426 ×6
  • Tile 1 x 2 with Robo Gold, Yellow, Red Print Black Part 3069bpr0104 Element 4109744 ×5
  • Tile 1 x 4 with Gold, Red and Blue Circuitry Print Black Part 2431pr0046 Element 4109748 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Black Part 2412b Element 241226 ×3
  • Turntable 4 x 4 Square Base with Top, Complete Assembly Black Part 3403c01 Element 4221663 or 4143677 ×1
  • Tyre Smooth Small with White Hollow Fixed Center (Space Shuttle Wheel) Black Part 6230 ×8
  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×4
  • Wedge Plate 3 x 4 without Stud Notches Black Part 4859 ×4
  • Wedge Plate 4 x 4 Wing Left Black Part 3936 Element 4280156 or 4189084 ×1
  • Wedge Plate 4 x 4 Wing Right Black Part 3935 Element 4280157 or 4189086 ×1
  • Wedge Plate 8 x 4 Wing Left Black Part 3933 Element 4189089 or 393326 ×1
  • Wedge Plate 8 x 4 Wing Right with Stud Notch Black Part 3934 Element 4189090 or 393426 ×1

Light Gray 94 pieces

  • Bracket 2 x 2 - 2 x 2 Light Gray Part 3956 Element 395602 ×1
  • Bracket 3 x 2 - 2 x 2 [aka Space Seat] Light Gray Part 4598 Element 4107108 or 459802 ×1
  • Brick 2 x 4 Light Gray Part 3001 Element 4116259 or 300102 ×2
  • Brick Sloped 33° 3 x 2 Light Gray Part 3298 Element 329802 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Light Gray Part 3040b Element 4121933 or 304002 ×10
  • Brick Sloped 45° 2 x 2 Light Gray Part 3039 Element 303902 ×10
  • Brick Sloped Inverted 45° 2 x 1 Light Gray Part 3665 Element 366502 ×2
  • Brick Sloped Inverted 75° 2 x 1 x 3 Light Gray Part 2449 Element 4160952 or 244952 ×2
  • Brick Special 1 x 1 with Headlight Light Gray Part 4070 Element 407002 ×2
  • Brick Special 1 x 2 with Grille Light Gray Part 2877 Element 287702 ×1
  • Brick Wedged, Sloped 6 x 4 Cutout, No Stud Notches Light Gray Part 6153a Element 615302 ×4
  • Hinge Plate 1 x 2 with 2 Fingers and Hollow Studs Light Gray Part 4276b Element 427602 ×12
  • Hinge Plate 1 x 2 with 3 Fingers On Side Light Gray Part 2452 Element 4238280 or 245202 ×2
  • Hinge Vehicle Roof Holder 1 x 4 Light Gray Part 4315 Element 431502 ×2
  • Plate 1 x 2 Light Gray Part 3023 Element 302302 ×2
  • Plate 1 x 3 Light Gray Part 3623 Element 362302 ×2
  • Plate 1 x 4 Light Gray Part 3710 Element 371002 ×3
  • Plate 1 x 6 Light Gray Part 3666 Element 366602 ×2
  • Plate 1 x 8 Light Gray Part 3460 Element 346002 ×1
  • Plate 2 x 2 Light Gray Part 3022 Element 302202 ×2
  • Plate 2 x 3 Light Gray Part 3021 Element 302102 ×2
  • Plate 2 x 4 Light Gray Part 3020 Element 302002 ×5
  • Plate 2 x 6 Light Gray Part 3795 Element 379502 ×1
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×1
  • Plate 4 x 4 Light Gray Part 3031 Element 4243813 or 303102 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Gray Part 4032a Element 403202 ×2
  • Tile 1 x 4 with Groove Light Gray Part 2431 Element 243102 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Light Gray Part 2412b Element 241202 ×6
  • Tile Special 1 x 2 with Handle Light Gray Part 2432 Element 243202 ×1
  • Wedge Plate 3 x 6 Cut Corners Light Gray Part 2419 Element 241902 ×2
  • Wheel Holder 2 x 2 Thin with Solid Wheel Clip Pins Light Gray Part 3870 ×4
  • Wing Plate Bi-level 12 x 9 (Exploriens) Light Gray Part 30037 Element 4109960 or 4109620 ×1

Trans-Dark Blue 11 pieces

  • Cone 1 x 1 [No Top Groove] Trans-Dark Blue Part 4589 Element 618843 ×2
  • Dish 2 x 2 Inverted [Radar] Trans-Dark Blue Part 4740 Element 6580383 or 6398233 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 ×6
  • Tile 1 x 1 with Groove Trans-Dark Blue Part 3070b Element 4541723 or 4218438 ×2

Trans-Neon Orange 11 pieces

  • Box 2 x 2 x 2 Door with Slot Trans-Neon Orange Part 4346 Element 3005947 ×2
  • Dish 2 x 2 Inverted [Radar] Trans-Neon Orange Part 4740 Element 6245295 or 3006347 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Neon Orange Part 6141 Element 6240218 or 3005747 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Trans-Neon Orange Part 2412b Element 6250159 or 6124829 ×3
  • Tool Chainsaw Blade Trans-Neon Orange Part 6117 Element 611747 ×1
  • Windscreen 3 x 4 x 4 Inverted Trans-Neon Orange Part 4872 Element 4109730 ×1
  • Windscreen 4 x 4 x 4 1/3 Helicopter Trans-Neon Orange Part 2483 Element 4109692 or 248347 ×1

White 7 pieces

  • Panel 1 x 2 x 1 [Square Corners] White Part 4865a Element 486501 ×1
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×3
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×2
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1

Blue 6 pieces

  • Brick 2 x 2 Corner Blue Part 2357 Element 4558606 or 4533323 ×4
  • Plate 2 x 8 Blue Part 3034 Element 303423 ×2

Red 3 pieces

  • Plate 2 x 2 Red Part 3022 Element 4613974 or 302221 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 2153-1 [No Color/Any Color] Part 71624 Element 4109652 ×1

Minifigures 2 figures

  • RoboForce, Red Minifigure, checked as a whole figure ×2

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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