BlockTalk Find Your Set

Free tool

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.

Mission Experience Pack

Checking

8450 Mission Experience Pack

644 pieces in 118 part and color combinations.

LEGO counts 643 pieces. This inventory comes from a separate parts catalog and lists 644; 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.

Show

Piece checklist

Technic Connectors 125 pieces

  • Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×2
  • Technic Axle Connector Ridged [with x Hole x Orientation] Black Part 6538b Element 4113805 or 4107083 ×3
  • Technic Axle Connector with Axle Hole Black Part 32039 Element 4107081 or 3203926 ×20
  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×10
  • Technic Axle and Pin Connector Angled #2 - 180° Black Part 32034 Element 6271869 or 4107783 ×4
  • Technic Axle and Pin Connector Angled #3 - 157.5° Black Part 32016 Element 6261386 or 4107082 ×7
  • Technic Axle and Pin Connector Angled #4 - 135° Black Part 32192 Element 6262897 or 4121610 ×10
  • Technic Axle and Pin Connector Angled #5 - 112.5° Black Part 32015 Element 6271346 or 4107084 ×4
  • Technic Axle and Pin Connector Angled #6 - 90° Black Part 32014 Element 6268905 or 4107767 ×3
  • Technic Axle and Pin Connector Perpendicular Black Part 6536 Element 6261371 or 4173668 ×27
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×3
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Black Part 32068 Element 6273318 or 4114670 ×6
  • Technic Pin Connector Round [No Slot] Black Part 75535 Element 75619 ×4
  • Technic Axle Connector Ridged [with x Hole x Orientation] Dark Turquoise Part 6538b Element 4112932 ×3
  • Technic Axle and Pin Connector Perpendicular 3L with Pin Hole Dark Turquoise Part 32068 Element 4112291 ×1
  • Technic Pin Connector Block 3 x 3 x 1 Dark Turquoise Part 32172 Element 4119316 ×4
  • Technic Axle Connector with Axle Hole Light Gray Part 32039 Element 4106469 ×1
  • Technic Axle and Pin Connector Angled #1 Light Gray Part 32013 Element 4106376 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Yellow Part 32184 Element 6276974 or 6037676 ×12

Technic Pins 115 pieces

  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×5
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×10
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 ×53
  • Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×8
  • Technic Pin 3/4 Dark Gray Part 32002 Element 4109854 ×11
  • Technic Axle Pin without Friction Ridges Lengthwise Light Gray Part 3749 Element 4184168 or 4154179 ×23
  • Technic Axle Towball Light Gray Part 2736 Element 273602 ×3
  • Technic Pin Double with Axle Hole Yellow Part 32138 Element 4130596 or 4119438 ×2

Technic Axles 112 pieces

  • Technic Axle 10 Black Part 3737 Element 373726 ×4
  • Technic Axle 12 Black Part 3708 Element 370826 ×1
  • Technic Axle 2 Notched Black Part 32062 Element 4109810 or 3206226 ×24
  • Technic Axle 3 Black Part 4519 Element 6238084 or 451926 ×21
  • Technic Axle 4 Black Part 3705 Element 370526 ×19
  • Technic Axle 5 Black Part 32073 Element 4114740 ×12
  • Technic Axle 6 Black Part 3706 Element 370626 ×16
  • Technic Axle 8 Black Part 3707 Element 370726 ×2
  • Technic Axle 3 with Stud Dark Gray Part 6587 Element 4113884 or 658727 ×13

Technic Beams 54 pieces

  • Technic Beam 1 x 3 Thin Black Part 6632 Element 6331723 or 4107828 ×12
  • Technic Beam 1 x 5 Thin Black Part 32017 Element 6114935 or 4503423 ×2
  • Technic Beam 1 x 7 Thin Black Part 32065 Element 6271573 or 6253293 ×2
  • Technic Beam 1 x 9 Bent (6 - 4) Thick Black Part 6629 Element 6279881 or 4119800 ×6
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×6
  • Technic Beam 3 x 3 L-Shape Thin Black Part 32056 Element 6271810 or 4112287 ×8
  • Technic Beam 1 x 6 Thin Dark Turquoise Part 32063 Element 4112299 ×2
  • Technic Beam 2 x 4 L-Shape Thick Dark Turquoise Part 32140 Element 6509369 or 6298570 ×2
  • Technic Beam 3 x 3 L-Shape Thin Dark Turquoise Part 32056 Element 4112288 ×6
  • Technic Beam 1 x 6 Thin Light Gray Part 32063 Element 4114200 ×4
  • Technic Beam 1 x 4 Thin with Stud Connector Yellow Part 2825 Element 4107135 or 282524 ×2
  • Technic Beam 3 x 3 L-Shape Thin Yellow Part 32056 Element 6271812 or 4112289 ×2

Technic Bushes 54 pieces

  • Technic Bush Light Gray Part 3713 Element 4125313 or 659002 ×6
  • Technic Bush 1/2 Smooth with Axle Hole Reduced Light Gray Part 32123a ×48

Plates 33 pieces

  • Plate 1 x 2 Black Part 3023 Element 302326 ×12
  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 1 x 4 Black Part 3710 Element 371026 ×5
  • Plate 2 x 2 Black Part 3022 Element 302226 ×13
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1

Technic Bricks 27 pieces

  • Technic Brick 1 x 16 [15 Pin Holes] Black Part 3703 Element 370326 ×4
  • Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×4
  • Technic Brick 1 x 4 [3 Pin Holes] Black Part 3701 Element 370126 ×6
  • 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 10 [9 Pin Holes] Dark Turquoise Part 2730 Element 4125499 ×2
  • Technic Brick 1 x 12 [11 Pin Holes] Dark Turquoise Part 3895 Element 4125500 ×2
  • Technic Brick 1 x 16 [15 Pin Holes] Dark Turquoise Part 3703 Element 4125547 ×2
  • Technic Brick 1 x 8 [7 Pin Holes] Dark Turquoise Part 3702 Element 4125497 ×1
  • Technic Slope Long 1 x 6 with 3 Pin Holes Dark Turquoise Part 2744 Element 4112298 ×2

Plates Round Curved and Dishes 18 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×3
  • Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Black Part 2654 Element 4617551 or 4278359 ×3
  • Plate Round 1 x 1 with Solid Stud Light Gray Part 6141 Element 614102 ×5
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 ×2
  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Yellow Part 4032a Element 403224 ×3

Bricks Sloped 14 pieces

  • Brick Sloped 10° 6 x 8 Black Part 4515 Element 6440324 or 4161067 ×2
  • Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×1
  • Brick Sloped Inverted 33° 3 x 2, Connections between Studs, Ovoid Bottom Pin Black Part 3747b Element 4500458 or 374726 ×2
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×2
  • Brick Sloped Inverted 45° 2 x 2 Double Convex Black Part 3676 Element 6403373 or 6123840 ×2
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Black Part 3660 Element 366026 ×4
  • Brick Sloped 33° 3 x 2 Dark Turquoise Part 3298 Element 6611552 or 6442379 ×1

Plates Special 13 pieces

  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×2
  • Plate Special 2 x 2 with 2 Pin Holes Black Part 2817 Element 281726 ×3
  • Plate Special 3 x 2 with Rounded End, Hole Black Part 3176 Element 317676 or 317626 ×4
  • Plate Special 4 x 6, Studs on 3 Edges Black Part 6180 Element 4100378 or 618026 ×1
  • Technic Plate 2 x 4 [3 Holes] Black Part 3709 Element 370926 ×2
  • Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×1

Bricks Round and Cones 12 pieces

  • Cone 4 x 4 x 2, Axle Hole [Plain] Dark Gray Part 3943b Element 4125548 or 394327 ×2
  • Brick Round 2 x 2 with Axle Hole Yellow Part 3941 Element 614324 or 394124 ×8
  • Cone 2 x 2 x 2, Open Stud Yellow Part 3942c Element 6055404 or 6022159 ×2

String, Bands and Reels 9 pieces

  • String Cord Medium Thickness 100cm Black Part 14728c100 Element 6003316 or 4500573 ×1
  • Technic Reel 3 x 2 Blue Part 32012 Element 4107179 ×1
  • Technic Rubber Belt Medium [26mm ID] [Round Cross Section] Blue Part 85545 Element 6049730 or 4544147 ×2
  • Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×5

Bricks Curved 8 pieces

  • Brick Curved 1 x 2 x 1 1/3 with Curved Top Black Part 6091 Element 6383142 or 6184784 ×6
  • Brick Curved 2 x 4 x 1 1/3 Black Part 6081 Element 6174252 or 4125550 ×2

Technic Gears 8 pieces

  • Technic Gear 12 Tooth Bevel Light Gray Part 6589 Element 658902 ×2
  • Technic Gear 16 Tooth with Round Holes [Old Style] Light Gray Part 4019 Element 4107176 or 401902 ×5
  • Technic Worm Gear Light Gray Part 4716 Element 471602 ×1

Technic Panels 8 pieces

  • Technic Panel Fairing # 1 Large Short, Large Holes, Side A Black Part 32190 Element 4121673 ×2
  • Technic Panel Fairing # 2 Large Short, Large Holes, Side B Black Part 32191 Element 4121674 ×2
  • Technic Panel Fairing # 3 Large Long, Large Holes, Side A Black Part 32188 Element 4121671 ×2
  • Technic Panel Fairing # 4 Large Long, Large Holes, Side B Black Part 32189 Element 4121672 ×2

Tubes and Hoses 8 pieces

  • Axle Hose, Soft 11L Black Part 32199 Element 4234438 or 4121646 ×2
  • Axle Hose, Soft 12L Black Part 32200 Element 4501290 or 4121647 ×2
  • Axle Hose, Soft 19L Black Part 32235 Element 6139205 or 4121650 ×2
  • Hose, Ribbed 7mm D. 14L / 11.2cm Black Part 78c14 Element 6143035 or 4275297 ×2

Tiles 6 pieces

  • Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×1
  • Tile 1 x 6 with Groove Black Part 6636 Element 663626 ×2
  • Tile 2 x 2 with Groove Black Part 3068b Element 306826 ×3

Technic Special 4 pieces

  • Technic Link 1 x 11 Black Part 6247 Element 4125549 ×2
  • Technic Cam Light Gray Part 6575 Element 657502 ×2

Tiles Special 4 pieces

  • Tile Special 1 x 2 Grille with Bottom Groove Dark Turquoise Part 2412b Element 4112297 ×4

Wheels and Tyres 4 pieces

  • Tyre 15 x 6 Offset Tread Small Black Part 3641 Element 4501046 or 364126 ×2
  • Wheel Balloon with Axle hole Black Part 4288 Element 4113076 or 428876 ×2

Large Buildable Figures 2 pieces

  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Black Part 32173 Element 4528179 or 4193779 ×2

Stickers 2 pieces

  • Sticker Sheet 1 for Set 8450-1 [No Color/Any Color] Part 22251 Element 4124181 ×1
  • Sticker Sheet 2 for Set 8450-1 [No Color/Any Color] Part 22512 Element 4125362 ×1

Technic Beams Special 2 pieces

  • Technic Beam 1 x 7 with Fan Dark Turquoise Part 32177 Element 4119337 ×2

Gear Parts 1 piece

  • CD-Rom, for 8450 [No Color/Any Color] Part upn0135 ×1

Technic Steering, Suspension and Engine 1 piece

  • Technic Shock Absorber 10L, Damped, Normal Spring Trans-Clear Part 76320c01 Element 4142095 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy