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.

Checking

42223 1966 Ford GT40 MKII Race Car

793 pieces in 163 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 18 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.

Technic Axle and Pin Connector Perpendicular Black ×5 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 3 Thick Black ×2 Dark Bluish Gray ×8 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Thick Black ×3 Dark Bluish Gray ×3 Black is darker than Dark Bluish Gray.
Technic Pin Connector Round 1L [Beam] Black ×7 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.

Piece checklist

Blue 90 pieces

Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×40
Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot Blue Part 42924 Element 6299413 ×50

Yellow 22 pieces

Technic Axle 3 Yellow Part 4519 Element 6130007 ×2
Technic Axle 5 Yellow Part 32073 Element 6130008 ×7
Technic Axle 7 Yellow Part 44294 Element 6130009 ×3
Technic Pin without Friction Ridges Lengthwise Yellow Part 3673 Element 6331822 1 spare in the box ×2
Technic Piston Yellow Part 4369 Element 6452846 ×8

Tan 13 pieces

Technic Axle 4 with Centre Stop Tan Part 99008 Element 4666999 ×1
Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 ×2
Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×1
Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×8
Technic Pin Long without Friction Ridges, with Anti-Roll Notch Tan Part 39888 Element 6321305 ×1

White 8 pieces

Technic Axle and Pin Connector Angled #2 - 180° White Part 32034 Element 6271870 or 4125554 ×2
Technic Axle and Pin Connector Perpendicular White Part 6536 Element 6261372 or 4173670 ×3
Technic Beam 1 x 2 Thick White Part 43857 Element 6215107 or 4227695 ×1
Technic Pin Connector Hub with 1 Axle White Part 22961 Element 6179606 ×2

Reddish Brown 6 pieces

Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×5
Technic Axle 5 with Stop Reddish Brown Part 15462 Element 6159763 ×1

Trans-Clear 6 pieces

Brick Curved 2 x 1 No Studs [1/2 Bow] Trans-Clear Part 11477 Element 6508253 ×2
Technic Panel Fairing #7 3L Very Small Smooth, Side A Trans-Clear Part 2387 Element 6510993 ×1
Technic Panel Fairing #8 3L Very Small Smooth, Side B Trans-Clear Part 2389 Element 6513876 or 6426596 ×1
Tile 1 x 1 with Groove Trans-Clear Part 3070b Element 6581822 or 6254254 1 spare in the box ×2

Orange 5 pieces

Technic Beam 1 x 2 with Axle on Side Orange Part 7244 Element 6540720 ×5

Metallic Gold 4 pieces

Wheel 30 x 14 Metallic Gold Part 56904 Element 6590297 ×2
Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Metallic Gold Part 56145 Element 6590413 ×2

Trans-Red 4 pieces

Equipment Cup / Teacup Saucer with Recessed Stud on Top [Plain] Trans-Red Part 38799 Element 6534874 1 spare in the box ×4

Dark Tan 2 pieces

Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×2

Pearl Titanium 2 pieces

Technic Pin Connector Round [Slotted] Pearl Titanium Part 62462 Element 6245501 or 6167943 ×2

Trans-Orange 2 pieces

Tile Round 1 x 1 Trans-Orange Part 98138 Element 6514197 or 6274747 1 spare in the box ×2

[No Color/Any Color] 1 piece

Sticker Sheet for Set 42223-1 [No Color/Any Color] Part 10115252 Element 6580423 ×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.

LEGO Missing Piece Checker

42223 1966 Ford GT40 MKII Race Car

Before you call it missing

Look-alike colors in this set

Your missing list

Piece checklist

Black 388 pieces