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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.

Ferrari Daytona SP3

Checking

42143 Ferrari Daytona SP3

3,778 pieces in 350 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. 4 parts in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. This set comes with 32 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.

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.

Tile 1 x 1 with Groove Black ×3 Trans-Brown ×2 Trans-Brown is see-through: hold the piece up to a light.
Technic Beam 1 x 4 Thin Black ×24 Dark Bluish Gray ×4 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 Thick Black ×20 Dark Bluish Gray ×9 Black is darker than Dark Bluish Gray.
Technic Pin Connector Hub with 2 Axles Black ×4 Dark Bluish Gray ×1 Black is darker than Dark Bluish Gray.

Piece checklist

Technic Bushes 79 pieces

Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 2 spares in the box ×39
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 2 spares in the box ×30
Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×6
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×4

Plates Round Curved and Dishes 35 pieces

Plate Round 1 x 1 with Solid Stud Black Part 6141 Element 614126 1 spare in the box ×4
Plate Round Corner 6 x 6 Black Part 6003 Element 6137779 or 4496676 ×2
Plate Special 4 x 4 with 3 x 3 Quarter Round Cutout Black Part 35044 Element 6208787 ×18
Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 1 spare in the box ×3
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×2
Plate Round Corner 3 x 3 Red Part 30357 Element 4178428 or 3035721 ×4
Plate Round 1 x 1 with Solid Stud Yellow Part 6141 Element 614124 1 spare in the box ×2

Tiles Round and Curved 34 pieces

Tile Round 1 x 1 Black Part 98138 Element 6284070 or 6139403 1 spare in the box ×5
Tile 4 x 4 Curved, Macaroni Red Part 27507 Element 6458177 or 6390262 ×18
Tile Round 1 x 1 Red Part 98138 Element 6284574 or 6063445 1 spare in the box ×4
Tile 4 x 4 Curved, Macaroni Trans-Brown Part 27507 Element 6507982 or 6400005 ×2
Tile Round 1 x 1 with Black Ferrari Horse Print Yellow Part 98138pr0323 Element 6430758 or 6346650 1 spare in the box ×5

Technic Beams Special 32 pieces

Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Black Part 61408 Element 6313520 ×2
Technic Beam Frame 11 x 15 Black Part 39790 Element 6295161 ×3
Technic Beam Frame 3 x 19 with 2 Center Cross Beams, 3 Openings Thick Black Part 67491 Element 6377025 ×2
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Black Part 64179 Element 6016154 ×13
Technic Beam Frame 7 x 11 Black Part 39794 Element 6265643 ×4
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×7
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×1

Tubes and Hoses 13 pieces

Axle Hose, Soft 16L Black Part 32202 Element 6057525 or 4121649 ×4
Axle Hose, Soft 12L Red Part 32200 Element 6296597 or 6097866 ×2
Axle Hose, Soft 7L Red Part 32580 Element 6334708 or 4569751 ×4
Hose Rigid 3mm D. 20L / 16cm Red Part 75c20 Element 6396458 1 spare in the box ×1
Hose Rigid 3mm D. 9L / 7.2cm White Part 75c09 Element 6523917 or 6392958 ×2

Wheels and Tyres 13 pieces

Tyre 87.9 x 44 Low Black Part 80279 Element 6362559 ×4
Wheel 11 x 8 with Center Groove Light Bluish Gray Part 42610 Element 4211758 ×5
Wheel 75 x 41 Ferrari Daytona #1 (Left) Metallic Silver Part 80280 Element 6327540 ×2
Wheel 75 x 41 Ferrari Daytona #2 (Right) Metallic Silver Part 80281 Element 6327546 ×2

Bars, Ladders and Fences 11 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 ×3
Bar 3L Bright Green Part 87994 Element 6161772 1 spare in the box ×4
Bar 4L (Lightsaber Blade / Wand) Trans-Red Part 30374 Element 6507880 or 6167284 ×4

Technic Bricks 10 pieces

Technic Brick 1 x 1 with Pin Hole Black Part 6541 Element 654126 ×1
Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×2
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Black Part 32064a Element 6178922 or 4233487 ×2
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Light Bluish Gray Part 32064a Element 6206249 or 4233493 ×1
Technic Pin Connector Block 1 x 5 x 3 Light Bluish Gray Part 32333 Element 6271360 or 4205761 ×2
Technic Brick 1 x 4 [3 Pin Holes] Red Part 3701 Element 370121 ×2

Bricks Curved 8 pieces

Brick Curved 4 x 1 Double, No Studs with White 'Ferrari' Print Black Part 93273pr0020 Element 6346645 ×4
Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Black Part 11153 Element 6580394 or 6037746 ×2
Brick Curved 2 x 1 No Studs [1/2 Bow] Red Part 11477 Element 6029946 ×2

Minifig Upper Body 8 pieces

Arm Skeleton [Bent / 2 Clips] Dark Bluish Gray Part 93609 Element 6318697 or 6167900 ×8

Technic Special 7 pieces

Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] Black Part 48267 Element 6288220 ×4
Technic Changeover Catch - New Style Red Part 51149 Element 6313493 ×1
Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] Red Part 48267 Element 6285599 ×2

Panels 6 pieces

Panel 1 x 1 x 1 Corner Light Bluish Gray Part 6231 Element 4215513 ×2
Panel 1 x 2 x 1 [Rounded Corners] Light Bluish Gray Part 4865b Element 6146223 ×2
Panel 1 x 4 x 3 [Side Supports / Hollow Studs] Trans-Clear Part 60581 Element 6514156 or 6344088 ×2

String, Bands and Reels 3 pieces

Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×2
Technic Rubber Belt Large [33mm ID] [Round Cross Section] Yellow Part 85546 Element 4544151 or 70905 ×1

Bricks Sloped 2 pieces

Brick Sloped 65° 2 x 2 x 2 with Bottom Tube Black Part 3678b Element 4273703 or 4256421 ×2

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.