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.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
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.
Plate 1 x 2Red ×5Trans-Red ×1Trans-Red is see-through: hold the piece up to a light.
Plate Round 1 x 1 with Solid StudRed ×12Trans-Red ×4Trans-Red is see-through: hold the piece up to a light.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)White ×2Trans-Clear ×2Trans-Clear is see-through: hold the piece up to a light.
Plate 1 x 2White ×2Trans-Clear ×6Trans-Clear is see-through: hold the piece up to a light.
Plate 1 x 2Yellow ×6Trans-Yellow ×2Trans-Yellow is see-through: hold the piece up to a light.
Brick Curved 4 x 1 No Studs [Stud Holder with Asymmetric Ridges]Light Bluish Gray ×6Metallic Silver ×2Light Bluish Gray is yellower than Metallic Silver.
8 more look-alike pairs
Plate Round 1 x 1 with Solid StudLight Bluish Gray ×3Metallic Silver ×2Light Bluish Gray is yellower than Metallic Silver.
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Orange ×6Trans-Orange ×6Trans-Orange is see-through: hold the piece up to a light.
Plate 1 x 2Black ×5Dark Bluish Gray ×18Black is darker than Dark Bluish Gray.
Plate 1 x 3Black ×3Dark Bluish Gray ×6Black is darker than Dark Bluish Gray.
Plate 1 x 4Black ×4Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 2 x 2Black ×3Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Plate 2 x 3Black ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Tile Special 1 x 2 Grille with Bottom GrooveBlack ×2Dark Bluish Gray ×2Black is darker than Dark Bluish Gray.
Technic Beam 1 x 7 Bent (4 - 4) ThickRedPart 32348Element 6332236 or 6278130×1
Tile 1 x 4 with GrooveRedPart 2431Element 243121×2
Tile Special 1 x 2 with HandleRedPart 2432Element 243221×2
Wheel Arch, Mudguard 2 x 4 StuddedRedPart 3788Element 378821×1
Blue
22 pieces
Brick Special 1 x 1 with HeadlightBluePart 4070Element 407023×8
Technic Axle Pin with Friction Ridges LengthwiseBluePart 43093Element 4309323 or 4206482×3
Technic Pin 1/2 without Friction RidgesBluePart 4274Element 41430052 spares in the box×10
Technic Pin Long with Friction Ridges Lengthwise, 2 Center SlotsBluePart 6558Element 4514553×1
Orange
22 pieces
Brick 1 x 4OrangePart 3010Element 4118827×3
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)OrangePart 54200Element 4504371 or 42481951 spare in the boxAlso in Trans-Orange×6
Plate 1 x 4OrangePart 3710Element 4118782×3
Plate 2 x 4OrangePart 3020Element 4158355 or 4122468×2
Tile 1 x 2 with GrooveOrangePart 3069bElement 4188771×4
Tile 1 x 4 with GrooveOrangePart 2431Element 4160593×2
Wheel Arch, Mudguard 2 x 4 StuddedOrangePart 3788Element 4550877 or 4500521×2
Lime
19 pieces
Brick 1 x 3LimePart 3622Element 4166093 or 4122448×2
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateLimePart 61409Element 6370977 or 4540385×2
Plate 1 x 2LimePart 3023Element 4164037 or 4122439×2
Plate 4 x 4LimePart 3031Element 4504850 or 4160080×1
Tile 1 x 2 with GrooveLimePart 3069bElement 4500125 or 4164025×3
Tile 1 x 4 with GrooveLimePart 2431Element 4164021×3
Tile 2 x 2 with GrooveLimePart 3068bElement 4518611 or 4184857×2
Wheel Arch, Mudguard 1 x 4 1/2LimePart 50947Element 6073009 or 4284253×4
Trans-Red
18 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-RedPart 54200Element 6245252 or 42443632 spares in the box×7
Plate 1 x 1Trans-RedPart 3024Element 6513963 or 6252042×4
Plate 1 x 2Trans-RedPart 3023Element 6514003 or 6240212Also in Red×1
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084502 spares in the boxAlso in Red×4
Tile 1 x 1 with GrooveTrans-RedPart 3070bElement 6581817 or 62542481 spare in the box×2
Trans-Dark Blue
16 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-Dark BluePart 54200Element 6245256 or 42443661 spare in the box×1
Cone 1 x 1 [No Top Groove]Trans-Dark BluePart 4589Element 618843×4
Plate 1 x 2Trans-Dark BluePart 3023Element 6514004 or 6240215×1
Plate Round 1 x 1 with Solid StudTrans-Dark BluePart 6141Element 6514055 or 62402142 spares in the box×10
Metallic Silver
10 pieces
Brick Curved 4 x 1 No Studs [Stud Holder with Asymmetric Ridges]Metallic SilverPart 61678Element 4532630Also in Light Bluish Gray×2
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Metallic SilverPart 54200Element 6610031 or 60921091 spare in the box×2
Engine / Air Scoop 2 x 2Metallic SilverPart 50943Element 6051377 or 4579841×1
Plate Round 1 x 1 with Solid StudMetallic SilverPart 6141Element 51809301 or 65461051 spare in the boxAlso in Light Bluish Gray×2
Tile Special 1 x 2 Grille with Bottom GrooveMetallic SilverPart 2412bElement 6051422 or 4579833×3
Trans-Clear
10 pieces
Brick 1 x 2 without Bottom TubeTrans-ClearPart 3065Element 6514262 or 6244904×2
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-ClearPart 54200Element 6245250 or 42443621 spare in the boxAlso in White×2
Plate 1 x 2Trans-ClearPart 3023Element 6514001 or 6240204Also in White×6
Trans-Orange
10 pieces
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Trans-OrangePart 54200Element 6245265 or 42443692 spares in the boxAlso in Orange×6
Plate Round 1 x 1 with Solid StudTrans-OrangePart 6141Element 6514059 or 62402271 spare in the box×4
Trans-Yellow
5 pieces
Plate 1 x 2Trans-YellowPart 3023Element 6514002 or 6240211Also in Yellow×2
Plate Round 1 x 1 with Solid StudTrans-YellowPart 6141Element 6514056 or 62402161 spare in the box×3
Trans-Green
4 pieces
Plate Round 1 x 1 with Solid StudTrans-GreenPart 6141Element 6514057 or 62402212 spares in the box×4
Tan
2 pieces
Plate 2 x 2TanPart 3022Element 4114084 or 302205×1
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×1
Trans-Brown
2 pieces
Windscreen 4 x 4 x 1Trans-BrownPart 6238Element 6238111 or 6030985×1
Windscreen 5 x 2 x 1 2/3Trans-BrownPart 6070Element 4204624×1
Trans-Light Blue
2 pieces
Glass for Window 1 x 4 x 6Trans-Light BluePart 57895Element 6581491 or 6256060×2
Trans-Neon Orange
2 pieces
Wave / Flame Rounded with Base PegsTrans-Neon OrangePart 6126a×2
Flat Silver
1 piece
Large Figure Weapon, Claw / Tooth / Hook 2 x 3 with Axle and HoleFlat SilverPart 42074Element 4617726×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 8186-1[No Color/Any Color]Part 86425Element 4550240×1
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.
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.