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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.

Formula Flash

Checking

8440 Formula Flash

418 pieces in 109 part and color combinations.

LEGO counts 414 pieces. This inventory comes from a separate parts catalog and lists 418; 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

Plates 103 pieces

  • Plate 1 x 1 Black Part 3024 Element 302426 1 spare in the box ×4
  • Plate 1 x 10 Black Part 4477 Element 447726 ×3
  • Plate 1 x 2 Black Part 3023 Element 302326 ×12
  • Plate 1 x 3 Black Part 3623 Element 362326 ×4
  • Plate 1 x 4 Black Part 3710 Element 371026 ×3
  • Plate 1 x 6 Black Part 3666 Element 366626 ×6
  • Plate 1 x 8 Black Part 3460 Element 346026 ×3
  • Plate 2 x 10 Black Part 3832 Element 383226 ×1
  • Plate 2 x 12 Black Part 2445 Element 244526 ×4
  • Plate 2 x 2 Black Part 3022 Element 302226 ×5
  • Plate 2 x 2 Corner Black Part 2420 Element 242026 ×10
  • Plate 2 x 3 Black Part 3021 Element 302126 ×2
  • Plate 2 x 6 Black Part 3795 Element 379526 ×3
  • Plate 2 x 8 Black Part 3034 Element 303426 ×1
  • Plate 4 x 6 Black Part 3032 Element 303226 ×2
  • Plate 1 x 3 Light Gray Part 3623 Element 362302 ×2
  • Plate 1 x 1 Red Part 3024 Element 302421 Also in Trans-Red ×3
  • Plate 1 x 2 Red Part 3023 Element 302321 ×10
  • Plate 1 x 3 Red Part 3623 Element 362321 ×7
  • Plate 1 x 4 Red Part 3710 Element 371021 ×5
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 2 x 10 Red Part 3832 Element 383221 ×1
  • Plate 2 x 2 Corner Red Part 2420 Element 242071 or 242021 ×8
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 Also in Red ×2

Technic Pins 49 pieces

  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×1
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×29
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×3
  • Technic Pin 1/2 without Friction Ridges Light Gray Part 4274 Element 427402 1 spare in the box ×16

Technic Bricks 39 pieces

  • Technic Brick 1 x 1 with Pin Hole Black Part 6541 Element 654126 ×2
  • Technic Brick 1 x 12 [11 Pin Holes] Black Part 3895 Element 389526 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Black Part 3700 Element 370026 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Black Part 3702 Element 370226 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Light Gray Part 3701 Element 370102 ×1
  • Technic Brick 1 x 10 [9 Pin Holes] Red Part 2730 Element 273021 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Red Part 3703 Element 370321 ×2
  • Technic Brick 1 x 2 [1 Pin Hole] Red Part 3700 Element 370021 ×2
  • Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×2
  • Technic Brick 1 x 6 [5 Pin Holes] Red Part 3894 Element 389421 ×8
  • Technic Brick 1 x 8 [7 Pin Holes] Red Part 3702 Element 370221 ×4
  • Technic Slope Long 1 x 6 with 3 Pin Holes Red Part 2744 Element 6337300 or 4508550 ×4

Plates Special 32 pieces

  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×8
  • Plate Special 1 x 2 with Long Towball Black Part 2508 Element 4274405 or 250826 ×4
  • Plate Special 2 x 2 with 1 Pin Hole [Split Underside Ribs] Black Part 2444 Element 244426 ×6
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×1
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×5
  • Technic Plate 2 x 8 [7 Holes] Light Gray Part 3738 Element 373802 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Red Part 3794a ×4
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 6mm] Red Part 4623 Element 462321 ×2
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×1

Technic Steering, Suspension and Engine 31 pieces

  • Technic Steering Arm Small with Towball Black Part 6571 Element 4543367 or 4125370 ×4
  • Technic Steering Knuckle Arm with Ball Joint Black Part 6572 Element 657226 ×4
  • Technic Engine Crankshaft Center Dark Gray Part 2854 Element 285427 1 spare in the box ×2
  • Technic Engine Piston Round Dark Gray Part 2851 Element 4160859 or 285127 ×6
  • Technic Engine Connecting Rod Light Gray Part 2852 Element 285202 ×6
  • Technic Engine Crankshaft Light Gray Part 2853 Element 4119475 or 285302 ×2
  • Technic Engine Cylinder with Side Slots Light Gray Part 2850a ×6
  • Technic Steering Wheel Small (3 Studs Diameter) Light Gray Part 2819 Element 4113032 or 281902 ×1

Technic Axles 23 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×3
  • Technic Axle 2 Black Part 3704 Element 370426 ×7
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×2
  • Technic Axle 4 Black Part 3705 Element 370526 ×5
  • Technic Axle 6 Black Part 3706 Element 370626 ×2
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×2

Technic Bushes 19 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 1 spare in the box ×9
  • Technic Bush 1/2 Toothed Type II [X Opening] Light Gray Part 4265b Element 4100501 or 657702 1 spare in the box ×10

Tiles 16 pieces

  • Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×2
  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×6
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×5
  • Tile 1 x 2 with Groove Red Part 3069b Element 4178178 or 306921 ×2
  • Tile 2 x 2 with Groove Red Part 3068b Element 306821 ×1

Technic Special 13 pieces

  • Technic Flex Cable End - Ball Connection with Cage Black Part 6644 Element 664426 ×2
  • Technic Plate 1 x 5 with Toothed Ends, 2 Studs and Center Axle Hole Black Part 2711 Element 4279391 or 4195722 ×2
  • Technic Plate 1 x 6 with Toothed Ends Black Part 4262 Element 4225507 or 4189329 ×2
  • Technic Seat / Chair [3 x 2 Base] Black Part 2717 Element 271726 ×1
  • Technic Flex Cable End Double with Pin Connection Dark Gray Part 6642 Element 664227 ×1
  • Technic Cam Light Gray Part 6575 Element 657502 ×1
  • Technic Flex Cable 6L Light Gray Part flex08c06 Element 75625 ×2
  • Technic Plate 1 x 4 with Toothed Ends Red Part 4263 Element 426371 or 426321 ×2

Hinges, Arms and Turntables 12 pieces

  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Black Part 73983 Element 6102782 or 74011 ×4
  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Red Part 73983 Element 6102786 or 74230 ×8

Tiles Special 11 pieces

  • Tile Special 1 x 1 with Clip and Straight Tips Black Part 2555 Element 255526 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Light Gray Part 2412b Element 241202 ×8
  • Tile Special 1 x 2 Grille with Bottom Groove Red Part 2412b Element 241221 ×1

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×2
  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 1 spare in the box ×6

Technic Beams 8 pieces

  • Technic Beam 1 x 4 Thin with Stud Connector Black Part 2825 Element 6331570 or 4107136 ×6
  • Technic Beam 1 x 4 Thin with Stud Connector Red Part 2825 Element 6392956 or 4227649 ×2

Technic Connectors 8 pieces

  • Technic Axle Connector Ridged [with + Hole + Orientation] Light Gray Part 6538a ×1
  • Technic Axle and Pin Connector Perpendicular Light Gray Part 6536 Element 4173667 or 653602 ×7

Tubes and Hoses 8 pieces

  • Hose Rigid 3mm D. 4L / 3.2cm Dark Gray Part 75c04 Element 4118605 ×2
  • Hose, Pneumatic 4mm D. 6L / 4.8cm Light Gray Part 5102c06 ×6

Wheels and Tyres 8 pieces

  • Tyre 49.6 x 28 VR Black Part 6594 Element 75778 ×4
  • Wheel 49.6 x 28 VR (36.8 x 26) with Axle Hole White Part 6595 Element 4496709 or 4179486 ×4

Bricks 6 pieces

  • Brick 1 x 1 Black Part 3005 Element 300526 ×2
  • Brick 2 x 2 Corner Black Part 2357 Element 235776 or 235726 ×2
  • Brick 1 x 3 Red Part 3622 Element 362221 ×2

Plates Wedged 6 pieces

  • Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×2
  • Wedge Plate 3 x 3 Cut Corner Red Part 2450 Element 245021 ×4

Pneumatics 6 pieces

  • Pneumatic T-Piece (T Bar) [New Style] Light Gray Part 4697b Element 469702 1 spare in the box ×6

Technic Gears 6 pieces

  • Technic Gear Differential, 24 -16 Tooth with Clutch on Both Sides Dark Gray Part 6573 Element 657327 ×1
  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×3
  • Technic Gear 24 Tooth Crown with Reinforcements [New Style] Light Gray Part 3650c Element 365002 ×1
  • Technic Gear 8 Tooth Light Gray Part 3647 Element 364702 1 spare in the box ×1

Bricks Sloped 5 pieces

  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×4
  • Brick Sloped Inverted 34° 3 x 1 without Internal Stopper Red Part 4287a ×1

Stickers 1 piece

  • Sticker Sheet for Set 8440-1 [No Color/Any Color] Part 169795 Element 169795 ×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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