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.
Technic Axle Connector Smooth [with x Hole + Orientation]Black ×2Dark Bluish Gray ×20Black is darker than Dark Bluish Gray.
Technic Axle 6RedPart 3706Element 6130002 or 4191526×7
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L AxleRedPart 11214Element 6209519×33
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin HolesRedPart 42003Element 6273712 or 4175442×1
Technic BushRedPart 3713Element 6271820 or 42271551 spare in the box×14
Technic Changeover Catch - New StyleRedPart 51149Element 6313493×4
Technic Gear 16 Tooth with Clutch on Both SidesRedPart 18946Element 6100930×7
Technic Pin Connector Hub with 1 AxleRedPart 22961Element 6167939×1
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Big Squared Pin Holes]RedPart 87082Element 6168687 or 4560172×4
Wire Clip with Axle HoleRedPart 49283Element 6263067×2
Orange
52 pieces
Brick Curved 4 x 2 No StudsOrangePart 93606Element 6054529×2
Brick Special 1 x 1 with HeadlightOrangePart 4070Element 4521571 or 4212455×4
Plate 1 x 2OrangePart 3023Element 4177932 or 4163009×2
Plate 2 x 3OrangePart 3021Element 4125278×4
Technic Axle and Pin Connector Angled #4 - 135°OrangePart 32192Element 6585266 or 6360139×1
Technic Beam 1 x 13 ThickOrangePart 41239Element 4629802 or 4164424×4
Technic Beam 1 x 5 ThickOrangePart 32316Element 6143014 or 4142138×1
Technic Beam 1 x 7 Bent (4 - 4) ThickOrangePart 32348Element 6278133 or 6102616×1
Technic Beam 1 x 9 ThickOrangePart 40490Element 6135086 or 4157376×2
Technic Beam 3 x 3 T-Shape ThickOrangePart 60484Element 6528012 or 6305545×1
Technic Beam 3 x 5 L-Shape ThickOrangePart 32526Element 6143015 or 4626639×2
Technic Panel 5 x 11 x 1 TaperedOrangePart 18945Element 6303439×2
Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel SurfaceOrangePart 24119Element 6523810 or 6303440×4
Technic Panel Fairing # 3 Small Smooth Long, Side AOrangePart 64683Element 6601288 or 6285295×2
Technic Panel Fairing # 4 Small Smooth Long, Side BOrangePart 64391Element 6601286 or 6285294×2
Technic Panel Fairing #1 Small Smooth Short, Side AOrangePart 87080Element 6370445 or 6303434×1
Technic Panel Fairing #2 Small Smooth Short, Side BOrangePart 87086Element 6370444 or 6303436×1
Technic Panel Fairing #21 5L Small Smooth, Side BOrangePart 11946Element 6340604 or 6022767×4
Technic Panel Fairing #22 5L Small Smooth, Side AOrangePart 11947Element 6352662 or 6286428×4
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]OrangePart 32054Element 6143033 or 4229603×4
Wheel 31 x 15 Technic, 7 Pin HolesOrangePart 60208Element 6303441×4
White
41 pieces
Bracket 1 x 2 - 2 x 2WhitePart 44728Element 6619296 or 6117940×2
Clutch Outer Side with Axle ConnectorWhitePart 46834Element 6257336×1
Technic Beam 1 x 2 ThinWhitePart 41677Element 6371416 or 4163533×14
Technic Beam 1 x 3 ThickWhitePart 32523Element 6632140 or 4208160×3
Technic Beam 1 x 3 ThinWhitePart 6632Element 6360038 or 4107826×10
Technic Beam 1 x 5 ThickWhitePart 32316Element 4249021 or 4140465×3
Technic Beam Frame 7 x 11WhitePart 39794Element 6247435×1
Technic Driving Ring ConnectorWhitePart 18948Element 6276052 or 6100932×4
Technic Pin Connector Round [Slotted]WhitePart 62462Element 6550164 or 6173116×3
Yellow
27 pieces
Technic Axle 5YellowPart 32073Element 6130008×18
Technic Axle 9YellowPart 60485Element 6130010×6
Technic Beam 1 x 2 ThickYellowPart 43857Element 4187122×2
Technic Connector Beam 3 x 3YellowPart 39793Element 6252654×1
Tan
26 pieces
Technic Axle 4 with Centre StopTanPart 99008Element 4666999×4
Technic Axle Pin without Friction Ridges LengthwiseTanPart 3749Element 4666579 or 4186017×3
Technic Gear 12 Tooth BevelTanPart 6589Element 4565452 or 4514556×5
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]TanPart 18575Element 6346517 or 6084724×4
Technic Pin Long without Friction RidgesTanPart 32556×10
Reddish Brown
23 pieces
Technic Axle 3 with StopReddish BrownPart 24316Element 6135494×22
Technic Axle 5 with StopReddish BrownPart 15462Element 6159763×1
Trans-Red
2 pieces
Tile Round 1 x 1Trans-RedPart 98138Element 6514189 or 62586071 spare in the box×2
Trans-Green
1 piece
Tile Round 1 x 1Trans-GreenPart 98138Element 6514194 or 62747421 spare in the box×1
[No Color/Any Color]
1 piece
Sticker Sheet for Set 42113-1[No Color/Any Color]Part 68302Element 6303286×1
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.