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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

42069 Extreme Adventure

2,382 pieces in 224 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. 7 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 26 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.

Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black ×6 Dark Bluish Gray ×2 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 13 Thick Black ×8 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 5 Thick Black ×5 Dark Bluish Gray ×29 Black is darker than Dark Bluish Gray.
Technic Beam 1 x 9 Thick Black ×6 Dark Bluish Gray ×15 Black is darker than Dark Bluish Gray.
Technic Beam 2 x 4 L-Shape Thick Black ×8 Dark Bluish Gray ×21 Black is darker than Dark Bluish Gray.
Technic Beam 3 x 5 L-Shape Thick Black ×20 Dark Bluish Gray ×4 Black is darker than Dark Bluish Gray.

1 more look-alike pair

Technic Panel 3 x 11 x 1 Black ×6 Dark Bluish Gray ×6 Black is darker than Dark Bluish Gray.

Piece checklist

Technic Special 165 pieces

Technic Link Tread Wide with Two Pin Holes, Reinforced Black Part 88323 Element 6014648 ×108
Technic Tread Attachment Black Part 24375 Element 6139223 1 spare in the box ×52
Technic Linear Actuator Mini with Dark Bluish Gray Head and Orange Axle Light Bluish Gray Part 92693 Element 6221464 or 4612100 ×1
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Light Bluish Gray Part 41669 Element 6149991 ×4

Technic Bushes 65 pieces

Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 1 spare in the box ×38
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 1 spare in the box ×4
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×23

Wheels and Tyres 40 pieces

Technic Wedge Belt Wheel [aka Pulley] Black Part 4185 Element 6323668 or 6192130 ×24
Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Black Part 13971 Element 6194485 ×8
Wheel 18 x 14 with Pin Hole, Fake Bolts and Shallow Spokes Metallic Silver Part 55981 Element 6194811 or 4495345 ×8

Bricks Special 36 pieces

Brick Special 1 x 2 with Groove Dark Green Part 4216 Element 6194488 ×24
Brick Special 1 x 2 with Groove Light Bluish Gray Part 4216 Element 4617170 or 4541224 ×12

Plates Round Curved and Dishes 20 pieces

Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 Also in Dark Bluish Gray ×6
Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 1 spare in the box ×1
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Dark Bluish Gray Part 4032a Element 4211042 Also in Black ×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Dark Bluish Gray Part 2654 Element 4613980 or 4278274 ×1
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Clear Part 2654 Element 6581772 or 6163901 ×6
Plate Round 1 x 1 with Solid Stud Trans-Light Blue Part 6141 Element 6514058 or 6240225 1 spare in the box ×4

Tiles Round and Curved 18 pieces

Tile Round 1 x 1 Black Part 98138 Element 6284070 or 6139403 1 spare in the box ×4
Tile Round 1 x 1 with Gauge and Red Pointer Print Flat Silver Part 98138pr0012 Element 6287877 or 6030333 1 spare in the box ×1
Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×7
Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×4
Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×2

Plates Special 13 pieces

Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×3
Plate Special 1 x 2 with Pin Hole on Top Black Part 11458 Element 6114987 ×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Blue Part 15573 Element 6092582 ×1
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Dark Green Part 15573 Element 6618101 or 6192250 ×2
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×1
Plate Special 1 x 2 with Pin Hole Underneath Light Bluish Gray Part 18677 Element 6168633 or 6089147 ×4

Bricks Curved 12 pieces

Brick Curved 2 x 2 x 2/3 Black Part 15068 Element 6053077 ×2
Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes Black Part 88930 Element 4587844 ×4
Brick Curved 6 x 4 x 2/3 Quad Curved with 2 x 2 Studs Black Part 98281 Element 6288408 or 6093975 ×1
Brick Curved 2 x 1 No Studs [1/2 Bow] Dark Bluish Gray Part 11477 Element 6029948 ×2
Brick Curved 2 x 2 x 2/3 Dark Purple Part 15068 Element 6182217 ×3

Bricks Sloped 12 pieces

Brick Sloped 30° 1 x 2 x 2/3 Blue Part 85984 Element 4651236 ×1
Brick Sloped 30° 1 x 2 x 2/3 Dark Green Part 85984 Element 6618117 or 6168574 ×2
Brick Sloped 30° 1 x 2 x 2/3 Light Bluish Gray Part 85984 Element 4568637 ×1
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
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Orange Part 54200 Element 6245265 or 4244369 1 spare in the box ×6

Tiles 12 pieces

Tile 1 x 1 with Groove Dark Bluish Gray Part 3070b Element 4210848 1 spare in the box ×2
Tile 1 x 2 with Groove Dark Purple Part 3069b Element 4613192 ×2
Tile 1 x 2 with Groove Trans-Clear Part 3069b Element 6514223 or 6251294 ×6
Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×2

Tiles Special 9 pieces

Tile Special 1 x 2 with Handle Blue Part 2432 Element 243223 ×2
Tile Special 1 x 2 with Handle Dark Green Part 2432 Element 6194487 or 4250294 ×4
Tile Special 1 x 2 with Handle Light Bluish Gray Part 2432 Element 4211357 ×2
Tile Special 2 x 3 Pentagonal Light Bluish Gray Part 22385 Element 6245254 or 6138695 ×1

Bricks Round and Cones 8 pieces

Cone 1 x 1 [Top Groove] Black Part 59900 Element 4529236 ×2
Brick Round 2 x 2 Dome Top, Hollow Stud Red Part 30367c Element 4216657 ×2
Brick Round 2 x 2 with Axle Hole Red Part 3941 Element 614321 or 394121 ×2
Brick Round 2 x 2 with Axle Hole White Part 3941 Element 6601920 or 614351 ×2

Technic Beams Special 8 pieces

Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced Light Bluish Gray Part 33299b Element 4563045 ×2
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Light Bluish Gray Part 14720 Element 6055519 ×2
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick Light Bluish Gray Part 64178 Element 4540797 ×1
Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×3

Technic Bricks 8 pieces

Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×6
Technic Pin Connector Block 1 x 5 x 3 Light Bluish Gray Part 32333 Element 6271360 or 4205761 ×2

Hinges, Arms and Turntables 4 pieces

Hinge Cylinder 1 x 2 Locking with 1 Finger and Axle Hole On Ends Black Part 30552 Element 4158848 ×1
Hinge Plate 1 x 2 Locking with 2 Fingers on Side, 9 Teeth Light Bluish Gray Part 60471 Element 4515341 ×1
Hinge Brick 2 x 2 Top Plate Thin White Part 6134 Element 6548272 or 4612342 ×2

Containers 3 pieces

Container Box 2 x 2 x 2 - Top Opening Blue Part 61780 Element 6173942 ×1
Box 2 x 2 x 2 [Hollow Studs] Red Part 4345b Element 4261628 or 434571 ×1
Box 2 x 2 x 2 Door with Slot White Part 4346 Element 434601 ×1

Minifig Accessories 3 pieces

Tap 1 x 1 without Hole in Spout Black Part 4599b Element 459926 1 spare in the box ×2
Equipment Medical Syringe Light Bluish Gray Part 87989 Element 4563719 1 spare in the box ×1

Bars, Ladders and Fences 2 pieces

Antenna 8H Whip Light Bluish Gray Part 2569 Element 6265157 or 6164381 ×2

Bricks 2 pieces

Brick 1 x 2 x 2 with Inside Stud Holder Blue Part 3245c Element 6133724 ×2

String, Bands and Reels 2 pieces

String Cord Medium Thickness (1mm) 150cm Dark Bluish Gray Part 37597c150 Element 6431485 or 6226157 ×1
Technic Reel 3 x 2 Yellow Part 32012 Element 4297401 or 4120070 ×1

Pneumatics 1 piece

Pneumatic T-Piece (T Bar) [New Style] Light Bluish Gray Part 4697b Element 4211508 1 spare in the box ×1

Stickers 1 piece

Sticker Sheet for Set 42069-1 [No Color/Any Color] Part 34354 Element 6194866 ×1

Supports, Girders and Cranes 1 piece

Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×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.