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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.

BIOGLOW Challenge set

Checking

45832 BIOGLOW Challenge set

2,096 pieces in 586 part and color combinations.

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.

Every bag and the box. Shake out each bag, check its corners and seams, and look inside the empty box.
Inside what you have built. Small pieces lodge inside tubes, under plates and between studs. Turn the model over and look.
The last few steps. Compare each recent step with its parts callout. A piece used in the wrong place earlier leaves you one short later.
Look-alike colors. 7 parts in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. Many sets include a few extra small pieces. Check them before you order a replacement.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

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.

Plant, Leaf 2 x 6 x 1 with 2 Studs Trans-Clear ×2 White ×1 Trans-Clear is see-through: hold the piece up to a light.
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Tan ×2 Dark Tan ×9 Tan is lighter than Dark Tan.
Plate 1 x 2 Tan ×7 Dark Tan ×11 Tan is lighter than Dark Tan.
Technic Beam 1 x 3 Thick Black ×9 Dark Bluish Gray ×5 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 9 Thick Dark Bluish Gray ×2 Black ×3 Dark Bluish Gray is lighter than Black.
Technic Cam Dark Bluish Gray ×4 Black ×4 Dark Bluish Gray is lighter than Black.

1 more look-alike pair

Technic Connector Beam 3 x 3 Dark Bluish Gray ×6 Black ×2 Dark Bluish Gray is lighter than Black.

Piece checklist

Technic Beams Special 24 pieces

Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Black Part 61408 Element 6313520 ×1
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×6
Technic Beam Frame 7 x 11 Black Part 39794 Element 6265643 ×5
Technic Beam Frame 11 x 15 Dark Bluish Gray Part 39790 Element 6265646 ×3
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×6
Technic Beam Frame 7 x 11 Lime Part 39794 Element 6247432 ×3

Technic Bushes 21 pieces

Technic Bush Black Part 3713 Element 6332148 or 6210506 ×3
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Dark Pink Part 32123b Element 6443852 ×2
Technic Bush Red Part 3713 Element 6271820 or 4227155 ×10
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 ×6

Technic Special 20 pieces

Technic Cam Black Part 6575 Element 4143187 Also in Dark Bluish Gray ×4
Technic Brick 1 x 2 with Hole and Dual Beam Extensions Dark Bluish Gray Part 85943 Element 6324639 or 4547958 ×1
Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 Also in Black ×4
Technic Ball Joint Light Bluish Gray Part 32474 Element 6070731 or 4585707 ×3
Technic Ball Joint Red Part 32474 Element 4290714 or 4178640 ×8

Hinges, Arms and Turntables 15 pieces

Hinge Plate 1 x 2 Locking with 1 Finger on Side, without Groove Black Part 44567b Element 6266244 ×3
Turntable 4 x 4 Square Base, Locking Black Part 61485 Element 4517986 ×1
Hinge Plate 1 x 12 Locking with Angled Side Extensions and Tapered Ends, 7 Teeth Green Part 57906 Element 6478100 or 6346399 ×3
Hinge Plate 2 x 4 with Pin Hole with 2 Holes - Bottom Light Bluish Gray Part 43056 Element 6258903 ×4
Hinge Plate 2 x 4 with Pin Hole with 2 Holes - Top Light Bluish Gray Part 43045 Element 6256117 ×4

Windows and Doors 14 pieces

Window 1 x 2 x 2 Flat Front Tan Part 60592 Element 6387150 or 6378142 ×7
Glass for Window 1 x 2 x 2 Flat Trans-Light Blue Part 60601 Element 6524698 or 6514137 ×7

Technic Panels 12 pieces

Technic Panel 3 x 7 x 1 Dark Bluish Gray Part 71709 Element 6321715 ×1
Technic Panel 5 x 11 x 1 Dark Bluish Gray Part 64782 Element 6207990 ×2
Technic Panel 5 x 11 x 1 Light Bluish Gray Part 64782 Element 6474925 or 4621555 ×1
Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface Reddish Brown Part 11954 Element 6621999 ×8

Minifig Headwear 11 pieces

Crown / Flower / Egg Shell Half Bright Green Part 39262 Element 6420228 ×3
Hat Wide Brim, Outback Style with Wide Belt, Buckle (Fedora) Dark Brown Part 61506 Element 6396165 ×1
Crown / Flower / Egg Shell Half Dark Green Part 39262 Element 6525766 ×1
Hat / Flat Cap, Old Style Dark Green Part 2514 Element 6454462 ×1
Crown / Flower / Egg Shell Half Pearl Gold Part 39262 Element 6257048 ×1
Hood, Connected Chin Reddish Brown Part 30381 Element 4655372 or 4277666 ×1
Crown / Flower / Egg Shell Half Sand Green Part 39262 Element 6582149 ×2
Helmet, Standard White Part 2446 Element 6138832 or 4583503 ×1

Animal / Creature Body Parts 7 pieces

Animal Body Part / Plant, Tail / Trunk / Tentacle / Tongue / Vine / Tree Branch (Long Tip) Dark Pink Part 80497 Element 6382560 ×2
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Reddish Brown Part 53451 Element 6270115 or 6249582 ×1
Animal Body Part, Horn Stacked 45 deg. with Axle Connectors Tan Part 2142 Element 6541450 ×1
Animal Body Part, Horn (Cattle) / Tentacle / Vine / Branch / Tongue - Long White Part 13564 Element 6269074 or 6032360 ×2
Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small Yellow Part 53451 Element 6270110 or 6014033 ×1

Tiles Special 7 pieces

Tile Special Round 2 x 2 with Hole Black Part 15535 Element 6143850 ×4
Tile Special 1 x 1 with Clip with Rounded Edges Red Part 15712 Element 6348058 or 6072998 ×1
Tile Special Round 2 x 2 with Hole Tan Part 15535 Element 6115248 ×2

Technic Gears 6 pieces

Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×1
Technic Gear 28 Tooth Double Bevel Light Bluish Gray Part 46372 Element 6259270 ×1
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×1
Technic Gear Rack 1 x 4 White Part 3743 Element 6457281 or 4250465 ×3

Minifig Shields, Weapons, & Tools 5 pieces

Weapon Bladed Claw Spread Green Part 10187 Element 6329651 ×2
Weapon Bladed Claw Spread Pearl Gold Part 10187 Element 6241936 ×3

Tubes and Hoses 5 pieces

Flexible Ribbed Hose 8mm Ends 19L Lime Part 57539 Element 6534733 ×2
Cable, Flexible 21L with 2 Connectors and Bars Medium Nougat Part 2630 Element 6504266 ×3

Minifig Heads 4 pieces

Minifig Head Chuck, Glasses Rectangular, Gray Eyebrows and Moustache Print Yellow Part 3626cpr1964 Element 6153321 ×1
Minifig Head Ronny, Eyebrows, Crow's Feet, Open Mouth Smile / Queasy Face with Sweat Drop Print Yellow Part 3626cpr1769 Element 6123728 ×1
Minifig Head, Dark Bluish Grey Eyebrows, Glasses, Crooked Smile / Open Mouth Teeth Smile Print Yellow Part 28621pr0015 Element 6464451 ×1
Minifig Head, Eyebrows, Glasses with Thick Edge, Peach Lips Print Yellow Part 3626cpr1965 Element 6153328 ×1

Minifig Lower Body 4 pieces

Hips and Dark Green Legs Dark Green Part 970c35 Element 6179173 or 6004681 ×1
Hips and Dark Tan Legs Dark Tan Part 970c11 Element 4582625 or 4524098 ×1
Hips and Dark Turquoise Legs with Pockets, Reflective Silver Stripes Print Dark Turquoise Part 970c46pr2563 Element 6461945 ×1
Hips and Reddish Brown Legs Reddish Brown Part 970c19 Element 4569114 or 4221886 ×1

Minifig Upper Body 4 pieces

Torso Jacket, Tan Sweater Print, Dark Green Arms, Yellow Hands Dark Green Part 973c35h01pr6250 Element 6409778 ×1
Torso Winter Coat, Hood, Tan Fur, Pockets, Laces Print, Olive Green Arms, Yellow Hands Olive Green Part 973c20h01pr0002 Element 6566725 ×1
Torso, Bomber Jacket, Thich Tan Fur Collar, Copper Zipper Print, Reddish Brown Arms and Hands Reddish Brown Part 973c19h19pr0004 Element 6554334 ×1
Torso, Jacket, Red/White Striped Shirt Print, Yellow Arms and Hands Reddish Brown Part 973c01h01pr0042 Element 6553226 ×1

Panels 4 pieces

Panel 1 x 2 x 1 [Rounded Corners] Red Part 4865b Element 6146217 or 486521 ×4

Plates Wedged 4 pieces

Wedge Plate 4 Stud 45° Angle Plate Light Bluish Gray Part 15706 Element 6442144 ×4

Rock 4 pieces

Rock Panel 2 x 4 x 6 Reddish Brown Part 47847 Element 6470002 or 4285708 ×4

Pneumatics 3 pieces

Pneumatic T-Piece (T Bar) [New Style] Black Part 4697b Element 6104209 ×2
Pneumatic T-Piece (T Bar) [New Style] Pearl Gold Part 4697b Element 6452472 or 6167930 ×1

Bricks Wedged 2 pieces

Brick Wedged, Sloped 45° 2 x 2 Corner Light Bluish Gray Part 13548 Element 6034676 ×1
Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs with BIOGLOW Logo Print White Part 45677pr0037 Element 6618296 ×1

String, Bands and Reels 2 pieces

Chain 16L [21 Links] Light Bluish Gray Part 60169 Element 6292172 or 4512049 ×1
String with End Studs and Minifig Grips 21L White Part 14210 Element 6096959 or 6037448 ×1

Minifig Headwear Accessories 1 piece

Headwear Accessory Visor For Standard Helmet Black Part 2447 Element 6252803 or 4651398 ×1

Transportation - Land 1 piece

Seat / Chair 2 x 2 Lime Part 4079 Element 6458421 ×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.