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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.

ElectroMech

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70754 ElectroMech

144 pieces in 68 part and color combinations, plus 2 minifigures.

The piece count includes the 9 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

Dark Bluish Gray 30 pieces

  • Arm Mechanical with 2 Clips [Battle Droid] Dark Bluish Gray Part 30377 Element 6319332 or 4210900 1 spare in the box ×2
  • Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / Grate Dark Bluish Gray Part 61409 Element 4540386 or 4521185 ×4
  • Brick Sloped 30° 1 x 2 x 2/3 with Dark Red Horizon Screen and Gold Switches and Buttons Print Dark Bluish Gray Part 85984pr0002 Element 6101924 ×1
  • Launcher Trigger, Weapon Gun Trigger Dark Bluish Gray Part 15392 Element 6051334 1 spare in the box ×2
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Dark Bluish Gray Part 2654 Element 4613980 or 4278274 ×3
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Dark Bluish Gray Part 88072 Element 6261355 or 4611703 ×1
  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Dark Bluish Gray Part 6553 Element 4210665 ×2
  • Technic Axle and Pin Connector Perpendicular Dark Bluish Gray Part 6536 Element 6536199 or 6261374 ×1
  • Technic Brick Special 2 x 2 with Ball Socket Wide and Axle Hole Dark Bluish Gray Part 92013 Element 4619760 ×6
  • Technic Brick Special 2 x 2 with Ball and Axle Hole, with 6 Holes in Ball Dark Bluish Gray Part 57909b Element 4497253 ×4
  • Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Dark Bluish Gray Part 30350b Element 4227517 ×2
  • Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×2

Blue 23 pieces

  • Arm Mechanical with Clip [Thick Support] Blue Part 98313 Element 6014032 ×3
  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Blue Part 47457 Element 4496366 ×2
  • Brick Sloped 65° 2 x 2 x 2 with Bottom Tube Blue Part 3678b Element 4653712 or 4549797 ×2
  • Brick Wedged 2 x 2 Facet Blue Part 87620 Element 6072633 ×2
  • Plate 2 x 8 Blue Part 3034 Element 303423 ×2
  • Plate Special 1 x 1 with Clip Vertical [Thick Open O Clip] Blue Part 60897 Element 6352221 or 4613257 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Blue Part 48336 Element 4514398 or 4247103 ×2
  • Technic Beam 1 x 3 Thin Blue Part 6632 Element 6344176 or 4107829 ×2
  • Technic Plate 2 x 4 [3 Holes] Blue Part 3709 Element 370923 ×3
  • Technic Plate 2 x 6 [5 Holes] Blue Part 32001 Element 4114027 or 3200123 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Blue Part 2412b Element 241223 ×2

Black 18 pieces

  • Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 1 spare in the box ×1
  • Bracket 5 x 2 x 1 1/3 with Holes, Pin Bottom Black Part 11215 Element 6039194 ×1
  • Brick Round 2 x 2 [Grill] Black Part 92947 Element 6024730 ×2
  • Large Figure Skeletal, Limb, 4L with Ball Joint on Axle and Ball Socket Black Part 90611 Element 4609682 ×2
  • Launcher, Plate Special 1 x 2 with Mini Blaster Black Part 15403 Element 6102734 ×2
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×1
  • Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Black Part 32064a Element 6178922 or 4233487 ×2
  • Technic Brick Special 2 x 2 with 10.2mm Balls with Holes and Axle Hole Black Part 17114 Element 6092732 ×1
  • Technic Knob Wheel Black Part 32072 Element 6284188 or 4248204 ×2
  • Wedge Plate 4 Stud 45° Angle Plate Black Part 15706 Element 6054852 ×4

Light Bluish Gray 13 pieces

  • Bar 5L with Handle (Friction Ram) Light Bluish Gray Part 87618 Element 4565433 ×1
  • Brick Special 1 x 2 Palisade [aka Log] Light Bluish Gray Part 30136 Element 4550325 or 4519968 ×2
  • Plate 2 x 2 Light Bluish Gray Part 3022 Element 4211397 ×1
  • Plate Special 1 x 2 5.9mm Towball Socket Light Bluish Gray Part 14418 Element 6414556 or 6338163 ×2
  • Plate Special 2 x 2 with Towball and Hole Light Bluish Gray Part 15456 Element 6448319 or 6359225 ×2
  • Technic Axle 3 Light Bluish Gray Part 4519 Element 4211815 ×1
  • Technic Axle 5 Light Bluish Gray Part 32073 Element 32073194 or 4211639 ×2
  • Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×2

Pearl Gold 13 pieces

  • Plate Special 1 x 2 [Side Handle Closed Ends] Pearl Gold Part 48336 Element 4585493 ×3
  • Tile Round 2 x 2 with Bottom Stud Holder Pearl Gold Part 14769 Element 6066345 ×2
  • Weapon Lightsaber Hilt with Bottom Ring Pearl Gold Part 64567 Element 6003147 1 spare in the box ×1
  • Weapon Sword / Katana / Shamshir with Uncapped Pommel [Square Guard] Pearl Gold Part 30173b Element 4505215 ×3
  • Weapon Sword, Big Blade with Bar Pearl Gold Part 98137 Element 6270131 or 4646843 ×4

Trans-Yellow 13 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 1 spare in the box ×12

Dark Blue 9 pieces

  • Brick Curved 2 x 2 x 2/3 Dark Blue Part 15068 Element 6554196 or 6061569 ×7
  • Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing End Dark Blue Part 47456 Element 6062104 or 4218675 ×2

Yellow 5 pieces

  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×3
  • Technic Knob Wheel Yellow Part 32072 Element 6284189 or 4203493 ×2

Dark Tan 4 pieces

  • Dish 4 x 4 Inverted [Radar] with Gray and Dark Purple Snake and Geometric Print Dark Tan Part 3960pr9994 Element 6101927 ×1
  • Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×2
  • Technic Axle 5 with Stop Dark Tan Part 15462 Element 6055631 ×1

White 4 pieces

  • Bar 6L with Stop Ring White Part 63965 Element 6170419 or 6081986 ×1
  • Dish 2 x 2 Inverted [Radar] White Part 4740 Element 6601845 or 474001 ×1
  • Technic Plate 2 x 6 [5 Holes] White Part 32001 Element 6552133 or 4527947 ×1
  • Weapon Lightsaber Hilt with Bottom Ring White Part 64567 Element 6615554 or 6040333 1 spare in the box ×1

Red 3 pieces

  • Bracket 1 x 2 - 2 x 2 Inverted Red Part 99207 Element 6001806 ×2
  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×1

Flat Silver 2 pieces

  • Weapon Crossbow and Bolt Flat Silver Part 2570 Element 6268843 or 4615594 ×2

Reddish Brown 2 pieces

  • Brick Round 2 x 2 [Grill] Reddish Brown Part 92947 Element 6036503 ×2

Tan 2 pieces

  • Brick Special 1 x 1 with Studs on 2 Sides Tan Part 47905 Element 4213568 ×1
  • Torso Mechanical, Battle Droid Tan Part 30375 Element 4262538 or 4143659 ×1

Medium Nougat 1 piece

  • Weapon Spike Flexible 3.5L Medium Nougat Part 64727 Element 6055107 ×1

Trans-Green 1 piece

  • Weapon Blade with Bar (Ninjago Jade Blade) Trans-Green Part 18950 Element 6100946 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 70754-1 [No Color/Any Color] Part 19570 Element 6100367 or 6100366 ×1

Minifigures 2 figures

  • Jay with Bandana Minifigure, checked as a whole figure ×1
  • Chope 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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