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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.

Ambulance

Checking

4431 Ambulance

187 pieces in 92 part and color combinations, plus 3 minifigures.

The piece count includes the 12 parts inside the set's minifigures, which this inventory lists separately. 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.

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Piece checklist

Plates 44 pieces

  • Plate 2 x 16 Black Part 4282 Element 428276 or 428226 ×1
  • Plate 2 x 3 Black Part 3021 Element 302126 ×1
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×3
  • Plate 2 x 8 Blue Part 3034 Element 303423 ×2
  • Plate 2 x 6 Dark Bluish Gray Part 3795 Element 4211002 ×1
  • Plate 6 x 8 Dark Bluish Gray Part 3036 Element 4210794 ×1
  • Plate 4 x 6 Light Bluish Gray Part 3032 Element 4211404 ×1
  • Plate 1 x 10 Red Part 4477 Element 447721 ×4
  • Plate 1 x 2 Red Part 3023 Element 302321 ×7
  • Plate 1 x 4 Red Part 3710 Element 371021 ×9
  • Plate 1 x 6 Red Part 3666 Element 366621 ×1
  • Plate 2 x 6 Red Part 3795 Element 379521 ×1
  • Plate 4 x 6 Red Part 3032 Element 303221 ×1
  • Plate 1 x 1 Trans-Dark Blue Part 3024 Element 6513965 or 6252044 ×2
  • Plate 1 x 2 Trans-Dark Blue Part 3023 Element 6514004 or 6240215 ×3
  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 1 spare in the box ×2
  • Plate 1 x 12 White Part 60479 Element 6552130 or 6548269 ×2
  • Plate 2 x 10 Yellow Part 3832 Element 383224 ×2

Plates Special 21 pieces

  • Plate Special 1 x 1 with Tooth Black Part 49668 Element 4273590 ×1
  • Plate Special 1 x 2, Top Clip [Split] Black Part 92280 Element 4598528 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Green Part 48336 Element 4521931 ×2
  • Plate Special 2 x 2 with Wheel Holder Light Bluish Gray Part 4488 Element 6018081 or 4211496 ×4
  • Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Red Part 6019 Element 601971 or 601921 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Red Part 48336 Element 4226876 ×4
  • Bracket 1 x 2 - 2 x 2 White Part 44728 Element 6619296 or 6117940 ×3
  • Plate Special 1 x 2 [Side Handle Closed Ends] White Part 48336 Element 6552125 or 4222017 ×1
  • Plate Special 2 x 6 x 2/3 with 4 Studs on Side, 1 Support Wall on Bottom White Part 87609 Element 4560929 ×1
  • Technic Plate 2 x 6 [5 Holes] White Part 32001 Element 6552133 or 4527947 ×1

Tiles 19 pieces

  • Tile 1 x 2 with Red 82, Yellow and White Gauges Print Light Bluish Gray Part 3069bpr0101 Element 4227776 ×2
  • Tile 1 x 4 with Groove Light Bluish Gray Part 2431 Element 4211356 or 2431194 ×2
  • Tile 2 x 4 with Groove Light Bluish Gray Part 87079 Element 4560183 ×1
  • Tile 1 x 2 with Groove Trans-Dark Blue Part 3069b Element 6514219 or 6251289 ×5
  • Tile 1 x 2 with Groove White Part 3069b Element 6548264 or 306901 ×1
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×1
  • Tile 1 x 6 with Groove White Part 6636 Element 6548296 or 663601 ×4
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1
  • Tile 1 x 4 with Groove Yellow Part 2431 Element 243124 ×1
  • Tile 1 x 6 with Groove Yellow Part 6636 Element 6388488 or 663624 ×1

Bricks 15 pieces

  • Brick 1 x 6 Dark Bluish Gray Part 3009 Element 4211100 ×1
  • Brick 1 x 2 Light Bluish Gray Part 3004 Element 4211388 ×2
  • Brick 2 x 3 Red Part 3002 Element 300271 or 300221 ×2
  • Brick 1 x 1 White Part 3005 Element 6552096 or 6548258 ×2
  • Brick 1 x 10 White Part 6111 Element 6619291 or 611101 ×2
  • Brick 1 x 4 White Part 3010 Element 6550135 or 301001 ×3
  • Brick 1 x 6 White Part 3009 Element 6552097 or 6548259 ×3

Bricks Sloped 14 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Dark Blue Part 54200 Element 6245256 or 4244366 1 spare in the box ×2
  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Trans-Yellow Part 54200 Element 6245272 or 4260942 1 spare in the box ×2
  • Brick Sloped 33° 3 x 1 White Part 4286 Element 6632142 or 428601 ×2
  • Brick Sloped 33° 3 x 4 White Part 3297 Element 329701 ×1
  • Brick Sloped 33° 3 x 6 No Inner Walls White Part 58181 Element 6332047 or 6023310 ×1
  • Brick Sloped Inverted 45° 2 x 1 White Part 3665 Element 6552106 or 366501 ×6

Plates Round Curved and Dishes 14 pieces

  • Dish 2 x 2 Inverted [Radar] Green Part 4740 Element 4567908 or 4239191 ×1
  • Plate Round 1 x 1 with Solid Stud Light Bluish Gray Part 6141 Element 4211525 ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×4
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 ×1

Wheels and Tyres 10 pieces

  • Tyre 21 x 12 with Offset Tread Small Wide and Beveled Tread Edge Black Part 60700 Element 4514560 ×4
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Light Bluish Gray Part 6014b Element 4211764 ×4
  • Wheel Bicycle, Fixed Black Tire Trans-Clear Part 92851 Element 6503209 or 6163986 ×2

Tiles Special 8 pieces

  • Tile Special 2 x 2 with Bar and Stud Light Bluish Gray Part 30256 Element 4542264 or 4211594 ×1
  • Tile Special 1 x 2 Grille with Bottom Groove Red Part 2412b Element 241221 ×2
  • Tile Special 1 x 2 Grille with Bottom Groove Yellow Part 2412b Element 241224 ×5

Transportation - Land 8 pieces

  • Bicycle Frame [Solid Stud] Green Part 4719 Element 4592277 ×1
  • Wheel Arch, Mudguard 4 x 2 1/2 x 2 with 2 x 2 Plate White Part 50745 Element 4259940 ×4
  • Seat / Chair 2 x 2 with Center Sprue Mark Yellow Part 4079b Element 407924 ×2
  • Steering Stand 1 x 2 with Black Steering Wheel Yellow Part 3829c01 Element 9553 ×1

Bricks Special 6 pieces

  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×3
  • Brick Special 1 x 4 with 4 Studs on One Side Light Bluish Gray Part 30414 Element 4211636 ×2
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×1

Bricks Curved 5 pieces

  • Brick Curved 3 x 1 No Studs Dark Bluish Gray Part 50950 Element 4246896 ×4
  • Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes White Part 88930 Element 6552135 or 4583297 ×1

Panels 5 pieces

  • Panel 1 x 2 x 3 [Side Supports / Hollow Studs] White Part 87544 Element 6550191 or 4585448 ×2
  • Panel 1 x 4 x 3 [Side Supports / Hollow Studs] White Part 60581 Element 6615548 or 4558208 ×2
  • Panel 1 x 6 x 5 White Part 59349 Element 6550180 or 4504228 ×1

Hinges, Arms and Turntables 3 pieces

  • Hinge Brick 2 x 2 Top Plate Thin Light Bluish Gray Part 6134 Element 4211881 ×2
  • Plate Special 4 x 6 with Trap Door Hinge [Long Pins] White Part 92099 Element 4599044 ×1

Windscreens and Fuselage 3 pieces

  • Windscreen 1 x 6 x 3 Trans-Light Blue Part 64453 Element 6580414 or 6514292 ×2
  • Windscreen 3 x 6 x 2 Trans-Light Blue Part 92583 Element 6503219 or 6255920 ×1

Bricks Round and Cones 2 pieces

  • Brick Round 1 x 1 Open Stud Red Part 3062b Element 306221 ×1
  • Brick Round 1 x 1 Open Stud Trans-Clear Part 3062b Element 6514232 or 6223655 ×1

Minifig Accessories 2 pieces

  • Tap 1 x 1 without Hole in Spout Blue Part 4599b Element 459923 ×1
  • Equipment Stretcher [No Bottom Hinges] White Part 93140 Element 4622575 ×1

Windows and Doors 2 pieces

  • Door 1 x 3 x 1 Left White Part 3822 Element 4527637 or 4161547 ×1
  • Door 1 x 3 x 1 Right White Part 3821 Element 4537987 or 4527638 ×1

Containers 1 piece

  • Trash Can with 4 Cover Holders Green Part 92926 Element 6171069 or 4626650 ×1

Minifig Headwear 1 piece

  • Helmet, Sports, with Vent Holes [Plain] Light Bluish Gray Part 46303 Element 4198316 ×1

Minifig Upper Body 1 piece

  • Arm Mechanical with 2 Clips [Battle Droid] Light Bluish Gray Part 30377 Element 6319333 or 4211658 1 spare in the box ×1

Plates Wedged 1 piece

  • Wedge Plate 6 x 6 Cut Corner Light Bluish Gray Part 6106 Element 4211520 ×1

Stickers 1 piece

  • Sticker Sheet for Set 4431-1 [No Color/Any Color] Part 98770 Element 4647290 ×1

Tiles Round and Curved 1 piece

  • Tile Round 2 x 2 with Fine Mesh Grill Print Light Bluish Gray Part 4150pr0022 Element 4221881 ×1

Minifigures 3 figures

  • Paramedic, Woman, Red Uniform, Black Hair Minifigure, checked as a whole figure ×1
  • Paramedic, Red Uniform, Dark Orange Hair Minifigure, checked as a whole figure ×1
  • Man, Dark Blue Plaid Shirt, Light Bluish Gray Legs, Dark Tan Hair, Glasses Minifigure, 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.

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.

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