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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.

Checking

75918 T. rex Tracker

507 pieces in 154 part and color combinations, plus 3 minifigures.

LEGO counts 520 pieces. This inventory comes from a separate parts catalog and lists 521, including the 14 parts inside the minifigures; 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.

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. Compare each color with the step's parts callout, especially White against Trans-Clear.
The spare pieces. This set comes with 17 spare pieces, marked on each row of the checklist. One may be the piece you need.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

Piece checklist

Technic Pins 46 pieces

Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Black Part 32054 Element 4140801 or 4107742 ×4
Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 3 spares in the box ×20
Technic Pin with Friction Ridges Lengthwise and Towball Black Part 6628 Element 4184169 or 662826 ×1
Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×8
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×9
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×4

Technic Connectors 40 pieces

Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) Black Part 6553 Element 4107765 or 655326 ×4
Technic Axle and Pin Connector, Perpendicular with Extension Flat Silver Part 53586 Element 6395637 or 6323657 ×2
Technic Axle Connector Smooth [with x Hole + Orientation] Light Bluish Gray Part 59443 Element 4512360 ×14
Technic Axle Connector with Axle Hole Light Bluish Gray Part 32039 Element 4211553 ×4
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Light Bluish Gray Part 32184 Element 6276969 or 4211621 ×8
Technic Pin Connector Round [Slotted] Light Bluish Gray Part 62462 Element 6173127 or 4526985 ×4
Technic Axle Connector Smooth [with x Hole + Orientation] Yellow Part 59443 Element 4519010 ×2
Technic Axle and Pin Connector Angled #1 Yellow Part 32013 Element 6329889 or 4107066 ×2

Tiles Special 34 pieces

Tile Special 2 x 3 with 2 Clips [Thick Open O Clips] Blue Part 30350b Element 6117844 or 4621898 ×12
Tile Special 1 x 2 Grille with Bottom Groove Dark Bluish Gray Part 2412b Element 4210631 ×7
Tile Special 1 x 2 with Handle Dark Bluish Gray Part 2432 Element 4211039 ×8
Tile Special Round 2 x 2 with Hole Dark Bluish Gray Part 15535 Element 6055313 ×2
Tile Special 1 x 1 with Clip with Rounded Edges Light Bluish Gray Part 15712 Element 6308012 or 6071229 ×1
Tile Special 1 x 2 Grille with Bottom Groove Light Bluish Gray Part 2412b Element 4211350 ×4

Technic Axles 33 pieces

Technic Axle 4 Black Part 3705 Element 370526 ×12
Technic Axle 8 Black Part 3707 Element 370726 ×8
Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×9
Technic Axle 2 Notched Red Part 32062 Element 4142865 ×4

Bricks 27 pieces

Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×6
Brick 1 x 8 Blue Part 3008 Element 300823 ×3
Brick 2 x 10 Blue Part 3006 Element 4615600 or 300623 ×2
Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×3
Brick 2 x 8 Blue Part 3007 Element 6037384 or 300723 ×3
Brick 1 x 4 Light Bluish Gray Part 3010 Element 4211394 ×1
Brick 2 x 2 Light Bluish Gray Part 3003 Element 4211387 ×3
Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×4
Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×2

Plates Round Curved and Dishes 26 pieces

Dish 2 x 2 Inverted [Radar] Dark Bluish Gray Part 4740 Element 4211010 ×1
Plate Round 1 x 1 with Solid Stud Dark Bluish Gray Part 6141 Element 4210633 2 spares in the box ×6
Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×4
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Light Bluish Gray Part 4032a Element 4211475 ×5
Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×8
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Yellow Part 2654 Element 6581773 or 6171728 ×2

Technic Bricks 18 pieces

Technic Brick 6 x 8 with 4 x 6 Opening Black Part 32532 Element 6448394 or 4188143 ×2
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Dark Bluish Gray Part 32064a Element 6178919 or 4210935 ×2
Technic Brick 1 x 4 [3 Pin Holes] Dark Bluish Gray Part 3701 Element 4213607 or 370127 ×6
Technic Brick 1 x 10 [9 Pin Holes] Light Bluish Gray Part 2730 Element 4211374 ×4
Technic Brick 1 x 16 [15 Pin Holes] Light Bluish Gray Part 3703 Element 4211443 ×4

Bricks Curved 13 pieces

Brick Curved 2 x 2 x 2/3 Blue Part 15068 Element 6116786 ×1
Brick Curved 3 x 1 No Studs Blue Part 50950 Element 4543998 ×2
Brick Curved 2 x 2 x 2/3 Dark Bluish Gray Part 15068 Element 6071261 ×6
Brick Curved 1 x 2 x 1 1/3 with Curved Top White Part 6091 Element 6285777 or 609101 ×4

Wheels and Tyres 12 pieces

Tyre 21 x 6 City Motorcycle Black Part 50861 Element 6064174 or 4244953 ×2
Tyre 56 x 26 Balloon Black Part 55976 Element 6495636 or 4297209 ×4
Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Light Bluish Gray Part 56145 Element 4297210 ×4
Wheel Centre 15 x 6 City Motorcycle with Stub Axles Light Bluish Gray Part 50862 Element 6410997 or 4590443 ×2

Technic Bushes 11 pieces

Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 3 spares in the box ×7
Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×4

Bricks Special 9 pieces

Bracket 5 x 2 x 2 1/3 with Holes, Inside Stud Holder Light Bluish Gray Part 76766 Element 6171067 or 6012653 ×4
Brick Special 1 x 2 with 2 Studs on 1 Side Light Bluish Gray Part 11211 Element 6015344 ×2
Brick Special 1 x 4 with 4 Studs on One Side Red Part 30414 Element 4177991 or 4157223 ×3

Animal / Creature Body Parts 8 pieces

Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Left, Small, Black Claws Print Dark Orange Part 98058pr0003 Element 6258455 or 6234164 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Arm / Leg, Right, Small, Black Claws Print Dark Orange Part 98059pr0003 Element 6258459 or 6234173 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Body with Reddish Brown and Dark Orange Skin Print Medium Nougat Part 98160pr0003 Element 6223585 or 6115650 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Head with Pin, White Teeth, Dark Orange Top and Dark Brown Stripes Print Medium Nougat Part 98161pr0003 Element 6223557 or 6115654 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Leg, Left, with Pin, Dark Orange and Reddish Brown Markings Print Medium Nougat Part 98162pr0003 Element 6223691 or 6115678 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Leg, Right, with Pin, Dark Orange and Reddish Brown Markings Print Medium Nougat Part 98163pr0003 Element 6223692 or 6115682 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Lower Jaw with White Teeth Print Medium Nougat Part 98057pr0003 Element 6223571 or 6115656 ×1
Animal Body Part, Dinosaur, Tyrannosaurus Rex Tail, with Pin, Reddish Brown and Dark Orange Stripes Print Medium Nougat Part 98159pr0003 Element 6223647 or 6115622 ×1

Technic Beams 8 pieces

Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Black Part 60483 Element 6265091 or 6006140 ×3
Technic Beam 1 x 9 Thick Dark Bluish Gray Part 40490 Element 4645730 or 4210757 ×4
Technic Beam 1 x 3 Thick White Part 32523 Element 6632140 or 4208160 ×1

Technic Special 6 pieces

Technic Ball Joint Black Part 32474 Element 4290713 or 4143539 ×2
Technic Link 1 x 9 Bent (6 - 4) Dark Bluish Gray Part 64451 Element 6170705 or 4539297 ×4

Bricks Round and Cones 5 pieces

Cone 1 x 1 [Top Groove] Trans-Dark Blue Part 59900 Element 6514018 or 6301313 ×1
Brick Round 2 x 2 with Axle Hole Yellow Part 3941 Element 614324 or 394124 ×4

Minifig Accessories 5 pieces

Bag / Briefcase Black Part 4449 Element 6268856 or 4154853 ×1
Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Dark Brown Part 64644 Element 4538950 ×1
Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Light Bluish Gray Part 64644 Element 4657366 ×1
Equipment Medical Syringe Lime Part 87989 Element 6086765 or 4654583 2 spares in the box ×2

Transportation - Land 5 pieces

Fairing, Motorcycle, Dirt Bike Blue Part 50860 Element 6208766 or 6117845 ×1
Engine / Air Scoop 2 x 2 Dark Bluish Gray Part 50943 Element 4502068 or 4278424 ×1
Vehicle Base, Motorcycle Chassis, Long Fairing Mounts Flat Silver Part 50859b Element 6055651 ×1
Handlebars Light Bluish Gray Part 30031 Element 4258308 ×1
Steering Stand 1 x 2 with Black Steering Wheel Yellow Part 3829c01 Element 9553 ×1

Hinges, Arms and Turntables 4 pieces

Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Black Part 44567a Element 4185620 ×4

Tiles Round and Curved 4 pieces

Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 ×2
Tile Round 1 x 1 Trans-Yellow Part 98138 Element 6514193 or 6274740 1 spare in the box ×2

Bars, Ladders and Fences 2 pieces

Bar 4L (Lightsaber Blade / Wand) Black Part 30374 Element 6116604 or 4140303 ×1
Bar Holder with Clip Dark Bluish Gray Part 11090 Element 6336970 or 6015890 ×1

Bricks Wedged 2 pieces

Brick Wedged, Curved Triple 4 x 4 x 2/3, 2 Studs Blue Part 45677 Element 6055328 or 4193072 ×2

Containers 2 pieces

Box 2 x 2 x 2 Door with Slot Light Bluish Gray Part 4346 Element 4211492 ×1
Box 2 x 2 x 2 [Hollow Studs] Light Bluish Gray Part 4345b Element 4211491 ×1

Minifig Shields, Weapons, & Tools 2 pieces

Weapon Lightsaber Hilt with Bottom Ring Black Part 64567 Element 4614712 or 4598897 1 spare in the box ×1
Weapon Gun Automatic Pistol with Top Clip Dark Bluish Gray Part 15445 Element 6191976 or 6055607 ×1

Projectiles / Launchers 2 pieces

Launcher, Brick Special 1 x 4 Spring Shooter with Light Bluish Gray Top Dark Bluish Gray Part 15400 Element 6324200 or 6048898 ×1
Projectile, Bar 8L with Black Arrow End (Spring Shooter Dart) Trans-Bright Green Part 19020 Element 6121062 ×1

Windscreens and Fuselage 2 pieces

Windscreen 2 x 4 x 2 Trans-Brown Part 3823 Element 6253684 or 4167504 ×2

Energy Effects 1 piece

Flame / Headwear Accessory Plume / Feather, Triple Point Trans-Neon Orange Part 64647 Element 6289248 or 6100033 1 spare in the box ×1

Flags, Banners and Signs 1 piece

Road Sign Clip-on 2 x 2 Square [Thick Open O Clip] Black Part 15210 Element 6323189 or 6063617 ×1

Stickers 1 piece

Sticker Sheet for Set 75918-1 [No Color/Any Color] Part 21370 Element 6115946 or 6115945 ×1

String, Bands and Reels 1 piece

String Cord Thin (0.5mm) 50cm Black Part 56823c50 Element 6530026 or 6489925 ×1

Tools 1 piece

Brick and Axle Separator v2.0 Orange Part 96874 Element 6240515 or 4654448 ×1

Minifigures 3 figures

Vet with Fedora Hat, Stern Minifigure, checked as a whole figure ×1
Vic Hoskins Minifigure, checked as a whole figure ×1
ACU Trooper with Sand Blue Armor, Female 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.