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.
342 pieces in 154 part and color combinations, plus 5 minifigures.
LEGO counts 364 pieces. This inventory comes from a separate parts catalog and lists 365, including the 23 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.
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.
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]Black ×1Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 ThickBlack ×2Dark Bluish Gray ×1Black is darker than Dark Bluish Gray.
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin HolesRedPart 42003Element 6273712 or 4175442×1
Technic Brick 1 x 2 [1 Pin Hole]RedPart 3700Element 370021×2
Technic BushRedPart 3713Element 6271820 or 42271551 spare in the box×1
Trans-Red
8 pieces
Plate Round 1 x 1 with Solid StudTrans-RedPart 6141Element 6514051 or 62084501 spare in the box×8
Flat Silver
5 pieces
Plate Round 1 x 1 with Solid StudFlat SilverPart 6141Element 46336912 spares in the box×5
Trans-Clear
5 pieces
Brick Round 2 x 2 x 1 2/3 Dome Top, Hollow StudTrans-ClearPart 30151bElement 6514278 or 6286876×1
Equipment Cup / Mug [Plain]Trans-ClearPart 3899Element 6514013 or 6238856×1
Panel 1 x 6 x 5Trans-ClearPart 59349Element 6514106 or 6245253×3
Lime
4 pieces
Brick Sloped 18° 2 x 1 x 2/3 with 4 Slots / GrateLimePart 61409Element 6370977 or 4540385×1
Cupboard 2 x 3 x 2 with Hollow StudsLimePart 92410Element 4625623×2
Panel 1 x 2 x 2 [Side Supports / Hollow Studs]LimePart 87552Element 6146956 or 4625625×1
Trans-Bright Green
4 pieces
Light Cover 1 x 1 Round with Internal Bar / Bionicle Barraki EyeTrans-Bright GreenPart 58176Element 6507869 or 6171864×4
Trans-Yellow
4 pieces
Plate Round 1 x 1 with Solid StudTrans-YellowPart 6141Element 6514056 or 62402161 spare in the box×4
Blue
3 pieces
Brick 2 x 3BluePart 3002Element 300223×1
Technic Pin Long with Friction Ridges Lengthwise, 2 Center SlotsBluePart 6558Element 4514553×2
Orange
2 pieces
Plate Round 1 x 1 with Solid StudOrangePart 6141Element 41571031 spare in the box×2
[No Color/Any Color]
2 pieces
Comic Book, Super Heroes, Marvel, Iron Man 3 (6046930 / 6046931)[No Color/Any Color]Part 6046930×1
Sticker Sheet for Set 76007-1[No Color/Any Color]Part 14648Element 6042677×1
Trans-Brown
1 piece
Windscreen 3 x 4 x 1 1/3 Large Glass SurfaceTrans-BrownPart 57783Element 6507931 or 6247359×1
Minifigures
5 figures
Pepper Potts, White SuitMinifigure, checked as a whole figure×1
Extremis SoldierMinifigure, checked as a whole figure×1
Iron Man Mark 42 Armor, Plain White HeadMinifigure, checked as a whole figure×1
The Mandarin with Dark Green CapeMinifigure, checked as a whole figure×1
Tony Stark in Black Shirt with Chest Arc ReactorMinifigure, 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.
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.