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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

42056 Porsche 911 GT3 RS

2,704 pieces in 229 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. 1 part in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. This set comes with 31 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 Beam 1 x 3 Thin Black ×12 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.

Piece checklist

Blue 446 pieces

Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×103
Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 4 spares in the box ×58
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×285

Red 100 pieces

Brick 1 x 3 Red Part 3622 Element 362221 ×2
Technic Axle 2 Notched Red Part 32062 Element 4142865 ×24
Technic Beam 1 x 4 Thin with Stud Connector Red Part 2825 Element 6392956 or 4227649 ×4
Technic Changeover Catch - + opening Red Part 6641 Element 6099696 or 4270473 ×5
Technic Driving Ring Connector Smooth [4 rounded side walls] Red Part 26287 Element 6153686 ×11
Technic Gear 16 Tooth with Clutch on Both Sides Red Part 18946 Element 6100930 ×8
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×40
Technic Shock Absorber 6.5L with Hard Spring, Tight Coil in Middle [Complete Assembly] Red Part 76537 Element 6144791 ×6

Trans-Clear 32 pieces

Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Clear Part 54200 Element 6245250 or 4244362 1 spare in the box ×2
Dish 4 x 4 Inverted [Radar] Trans-Clear Part 3960 Element 4166082 or 4125240 ×2
Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 1 spare in the box ×12
Plate 1 x 2 Trans-Clear Part 3023 Element 6514001 or 6240204 ×10
Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 1 spare in the box ×2
Tile 1 x 2 with Groove Trans-Clear Part 3069b Element 6514223 or 6251294 ×4

Trans-Red 26 pieces

Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Red Part 54200 Element 6245252 or 4244363 1 spare in the box ×12
Plate 1 x 2 Trans-Red Part 3023 Element 6514003 or 6240212 ×8
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Red Part 41669 Element 4163567 ×2
Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×4

Dark Tan 18 pieces

Technic Axle 3 with Stud Dark Tan Part 6587 Element 6031821 or 6013821 ×1
Technic Axle 5 with Stop Dark Tan Part 15462 Element 6055631 ×17

Reddish Brown 18 pieces

Technic Axle 3 with Stop Reddish Brown Part 24316 Element 6135494 ×18

Tan 16 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 ×1
Technic Engine Crankshaft Center Tan Part 2854 Element 6355727 or 6013937 ×2
Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×6
Technic Gear 20 Tooth Bevel Tan Part 32198 Element 6031962 or 4514557 ×2
Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×2
Technic Pin Long without Friction Ridges Tan Part 32556 ×2

White 7 pieces

Rubber Belt Small [15mm ID] [Round Cross Section] White Part 85543 Element 6699001 or 4580665 ×4
Technic Driving Ring Connector White Part 18948 Element 6276052 or 6100932 ×1
Technic Gear 24 Tooth Clutch with Dark Bluish Gray Center White Part 76244 Element 6198486 or 6036892 ×1
Tile 1 x 4 with Porsche 'GT3RS LG-P' and Code Print White Part 2431pr0080 Element 6170271 or 6160271 ×1

Flat Silver 4 pieces

Hose, Ribbed 7mm D. 7L / 5.6cm Flat Silver Part 78c07 Element 6083456 ×4

[No Color/Any Color] 1 piece

Sticker Sheet for Set 42056-1 [No Color/Any Color] Part 27056 Element 6154914 ×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

42056 Porsche 911 GT3 RS

Before you call it missing

Look-alike colors in this set

Your missing list

Piece checklist