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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.

App-Controlled Top Gear Rally Car

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42109 App-Controlled Top Gear Rally Car

463 pieces in 95 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.

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Piece checklist

Technic Pins 208 pieces

  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 2L Axle Black Part 18651 Element 6089119 ×4
  • Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 2 spares in the box ×95
  • Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 ×32
  • Technic Pin 1/2 without Friction Ridges Blue Part 4274 Element 4143005 1 spare in the box ×10
  • Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Blue Part 6558 Element 4514553 ×34
  • Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×2
  • Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle Red Part 11214 Element 6209519 ×15
  • Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×10
  • Technic Pin with Friction Ridges Lengthwise and Towball - Round Pin Hole Red Part 66906 Element 6360104 ×2
  • Technic Pin 3/4 Tan Part 32002 Element 6663097 or 6013938 1 spare in the box ×4

Technic Beams 67 pieces

  • Technic Beam 1 x 11.5 Double Bent Thick Black Part 32009 Element 6271152 or 4111998 ×6
  • Technic Beam 1 x 13 Thick Black Part 41239 Element 4522933 or 4164422 ×1
  • Technic Beam 1 x 7 Thick Black Part 32524 Element 4495935 or 4155458 ×1
  • Technic Beam 2 x 4 L-Shape Thick Black Part 32140 Element 6271825 or 4120017 ×6
  • Technic Beam 3 x 5 L-Shape Thick Black Part 32526 Element 4142823 or 3252626 ×14
  • Technic Beam 1 x 11 Thick Dark Blue Part 32525 Element 6151077 or 6059006 ×5
  • Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole Dark Bluish Gray Part 60483 Element 6265093 or 6006141 ×7
  • Technic Beam 1 x 3 Thick Light Bluish Gray Part 32523 Element 4211655 ×1
  • Technic Beam 1 x 5 Thin Light Bluish Gray Part 32017 Element 4503416 or 4211554 ×2
  • Technic Beam 3 x 3 T-Shape Thick Light Bluish Gray Part 60484 Element 4552348 or 4535772 ×7
  • Technic Beam 1 x 2 Thin Red Part 41677 Element 6371442 or 4186678 ×10
  • Technic Beam 1 x 5 Thick Red Part 32316 Element 4142132 or 4128589 ×2
  • Technic Beam 1 x 9 Thick White Part 40490 Element 6001831 or 4156341 ×5

Technic Connectors 59 pieces

  • Technic Axle and Pin Connector Angled #1 Black Part 32013 Element 6284699 or 4107085 ×6
  • Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes Black Part 42003 Element 6273708 or 4200326 ×4
  • Technic Axle and Pin Connector Perpendicular Double Black Part 32291 Element 6280394 or 4140430 ×2
  • Technic Axle and Pin Connector Perpendicular Triple Black Part 63869 Element 6362991 or 6007966 ×6
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Black Part 65487 Element 6282140 ×1
  • Technic Pin Connector Round 1L [Beam] Black Part 18654 Element 6121485 1 spare in the box ×7
  • Technic Pin Connector Round [Slotted] Black Part 62462 Element 6173119 or 4526982 ×2
  • Technic Pin Connector Hub with 2 Axles Dark Bluish Gray Part 27940 Element 6167281 ×2
  • Technic Axle and Pin Connector Angled #2 - 180° Light Bluish Gray Part 32034 Element 6346487 or 4211567 ×1
  • Technic Axle and Pin Connector Perpendicular Light Bluish Gray Part 6536 Element 6261375 or 4211775 ×6
  • Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) Light Bluish Gray Part 65489 Element 6282158 ×2
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Light Bluish Gray Part 65487 Element 6282142 ×8
  • Technic Pin Connector Round 1L [Beam] Light Bluish Gray Part 18654 Element 6183784 1 spare in the box ×2
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Red Part 32184 Element 6276963 or 4128598 ×2
  • Technic Pin Connector Hub with 1 Axle Red Part 22961 Element 6167939 ×2
  • Wire Clip with Axle Hole Red Part 49283 Element 6263067 ×2
  • Technic Axle Connector with Axle Hole Yellow Part 32039 Element 4107800 or 3203924 ×1
  • Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Centered Friction Ridge] Yellow Part 65487 Element 6282151 ×1
  • Wire Clip with Axle Hole Yellow Part 49283 Element 6263069 ×2

Technic Panels 29 pieces

  • Technic Panel Curved 11 x 3 with 10 Pin Holes through Panel Surface Black Part 11954 Element 6031916 ×4
  • Technic Panel Curved 3 x 13 Black Part 18944 Element 6208345 or 6162372 ×1
  • Technic Panel Fairing # 3 Small Smooth Long, Side A Black Part 64683 Element 4541924 ×2
  • Technic Panel Fairing # 4 Small Smooth Long, Side B Black Part 64391 Element 4541325 ×2
  • Technic Panel Fairing #1 Small Smooth Short, Side A Black Part 87080 Element 4566251 ×1
  • Technic Panel Fairing #2 Small Smooth Short, Side B Black Part 87086 Element 4566249 ×1
  • Technic Panel Fairing #21 5L Small Smooth, Side B Dark Blue Part 11946 Element 6352645 or 6174854 ×3
  • Technic Panel Fairing #22 5L Small Smooth, Side A Dark Blue Part 11947 Element 6352664 or 6174857 ×3
  • Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 Red Part 42531 Element 6601524 or 6254783 ×1
  • Technic Panel Curved and Bent 6 x 3 Red Part 24116 Element 6285602 ×2
  • Technic Panel 3 x 11 x 1 White Part 15458 Element 6055627 ×2
  • Technic Panel 5 x 11 x 1 White Part 64782 Element 6004135 or 4580019 ×1
  • Technic Panel Car Mudguard Arched 9 x 2 x 3 #30 White Part 42531 Element 6254784 ×5
  • Technic Panel Curved 7 x 3 with 2 Pin Holes through Panel Surface White Part 24119 Element 6246996 ×1

Technic Axles 24 pieces

  • Technic Axle 4 Black Part 3705 Element 370526 ×3
  • Technic Axle 8 Black Part 3707 Element 370726 ×1
  • Technic Axle 4 with Stop Dark Bluish Gray Part 87083 Element 6083620 or 4560177 ×4
  • Technic Axle 5.5 with Stop [Rounded Short End] Dark Bluish Gray Part 59426 Element 4508553 ×1
  • Technic Axle 2 Notched Red Part 32062 Element 4142865 ×11
  • Technic Axle 3 Yellow Part 4519 Element 6130007 ×3
  • Technic Axle 7 Yellow Part 44294 Element 6130009 ×1

Bricks Round and Cones 11 pieces

  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Black Part 25214 Element 6179182 ×4
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Light Bluish Gray Part 25214 Element 6151349 ×6
  • Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Yellow Part 25214 Element 6253294 or 6173898 ×1

Plates Round Curved and Dishes 10 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Black Part 4032a Element 403226 ×10

Technic Gears 10 pieces

  • Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×1
  • Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×1
  • Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×1
  • Differential Gear House Light Bluish Gray Part 65414 Element 6285647 ×1
  • Differential Gear - 28 Tooth with Round Axle Hole Red Part 65413 Element 6285646 ×1
  • Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×5

Wheels and Tyres 9 pieces

  • Tyre 43.2 x 22 ZR Black Part 44309 Element 4184286 ×2
  • Tyre 49.53 x 20 Black Part 15413 Element 6518565 or 6055626 ×2
  • Wheel 30.4 x 20 without Pinholes, with Reinforced Rim Black Part 56145 Element 4299389 or 4284946 ×4
  • Wheel 18 x 8 with Fake Bolts and Deep Spokes with Inner Ring Light Bluish Gray Part 13971 Element 6359807 or 6044729 ×1

Tiles Round and Curved 8 pieces

  • Tile Round 1 x 1 Trans-Red Part 98138 Element 6514189 or 6258607 1 spare in the box ×4
  • Tile Round 2 x 2 with Bottom Stud Holder White Part 14769 Element 6601846 or 6044691 ×4

Technic Beams Special 7 pieces

  • Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Black Part 61408 Element 6313520 ×4
  • Technic Beam Frame 5 x 7 with 3 x 5 Opening Thick Light Bluish Gray Part 64179 Element 4539880 ×1
  • Technic Beam Frame 7 x 11 White Part 39794 Element 6247435 ×2

Technic Bushes 5 pieces

  • Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×3
  • Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×2

Bricks Curved 4 pieces

  • Brick Curved 2 x 2 with Lip, No Studs Trans-Clear Part 30602 Element 6507871 or 6166113 ×2
  • Brick Curved 2 x 1 No Studs [1/2 Bow] White Part 11477 Element 6552145 or 6548276 ×2

Electronics 3 pieces

  • Motor, Large, Powered Up Dark Bluish Gray Part 22169 Element 6545732 or 6456189 ×1
  • Motor, XL, Powered Up Dark Bluish Gray Part 22172 Element 6214088 ×1
  • Hub, Powered Up 4-Port (Technic Control+) - Clip Opening Light Bluish Gray Part 22127 Element 6142536 ×1

Bricks Wedged 2 pieces

  • Brick Wedged, Curved 6 x 2 Left, Inner Ridges White Part 41748 Element 6552117 or 4160124 ×1
  • Brick Wedged, Curved 6 x 2 Right, Inner Ridges White Part 41747 Element 4160101 ×1

Plates 2 pieces

  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 1 spare in the box ×2

Plates Special 2 pieces

  • Plate Special 1 x 2 with Pin Hole Underneath Black Part 18677 Element 6192309 or 6167497 ×2

Technic Bricks 2 pieces

  • Technic Brick 1 x 2 [2 Pin Holes] Red Part 32000 Element 4179355 or 4101764 ×2

Stickers 1 piece

  • Sticker Sheet for Set 42109-1 [No Color/Any Color] Part 65626 Element 6283778 ×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.

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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.

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