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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.

Fire Rescue

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4031 Fire Rescue

346 pieces in 125 part and color combinations, plus 4 minifigures.

LEGO counts 361 pieces. This inventory comes from a separate parts catalog and lists 365, including the 19 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.

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Piece checklist

Red 106 pieces

  • Boat 52 x 12 x 6 1/3 [Complete Assembly] Red Part upn0385c01 ×1
  • Brick 1 x 1 Red Part 3005 Element 300521 ×8
  • Brick 1 x 2 Red Part 3004 Element 4613961 or 300421 ×12
  • Brick 1 x 3 Red Part 3622 Element 362221 ×6
  • Brick 1 x 4 Red Part 3010 Element 301021 ×4
  • Brick Sloped 33° 3 x 1 Red Part 4286 Element 428621 ×4
  • Brick Sloped 45° 2 x 1 with Bottom Pin Red Part 3040b Element 4121934 or 304021 ×7
  • Brick Sloped 45° 2 x 2 Red Part 3039 Element 303921 ×1
  • Brick Sloped 45° 2 x 2 Double Convex Red Part 3045 Element 4163087 or 304521 ×4
  • Brick Sloped 45° 2 x 2 with White Phone Print Red Part 3039pr0012 Element 81511 ×1
  • Brick Sloped 45° 2 x 3 Red Part 3038 Element 6303213 or 4195081 ×2
  • Brick Sloped 45° 2 x 4 Red Part 3037 Element 303721 ×1
  • Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Red Part 3747a Element 374721 ×1
  • Brick Sloped Inverted 45° 2 x 1 Red Part 3665 Element 366521 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×1
  • Brick Sloped Inverted 75° 2 x 1 x 3 Red Part 2449 Element 4501534 or 4280141 ×4
  • Brick Special 1 x 1 with Headlight Red Part 4070 Element 407021 ×12
  • Door 1 x 3 x 4 Left Red Part 3193 ×1
  • Door 1 x 3 x 4 Right Red Part 3192 ×1
  • Hinge Vehicle Roof 4 x 4 Red Part 4213 Element 4179277 or 421321 ×2
  • Hinge Vehicle Roof Holder 1 x 4 Red Part 4315 Element 4179280 or 431521 ×3
  • Panel 1 x 2 x 2 [Solid Studs] Red Part 4864a ×2
  • Plate 1 x 10 Red Part 4477 Element 447721 ×1
  • Plate 1 x 2 Red Part 3023 Element 302321 ×2
  • Plate 1 x 6 Red Part 3666 Element 366621 ×2
  • Plate 2 x 3 Red Part 3021 Element 302121 ×2
  • Plate 2 x 6 Red Part 3795 Element 379521 ×3
  • Plate 2 x 8 Red Part 3034 Element 303421 ×1
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Red Part 3794a ×4
  • Plate Special 2 x 2 with Wheel Holder Red Part 4488 Element 448821 ×1
  • Technic Plate 2 x 4 [3 Holes] Red Part 3709 Element 370921 ×1
  • Tile 1 x 8 with Groove Red Part 4162 Element 416221 ×1
  • Turntable 2 x 2 Plate, Base Red Part 3680 Element 368021 ×2
  • Window 1 x 2 x 2 Plane, Solid Studs Red Part 2377 Element 4140522 ×2
  • Window 1 x 4 x 2 Plane, Solid Studs Red Part 4863 Element 4217651 or 486321 ×2

White 77 pieces

  • Antenna 1 x 4 with Rounded Top White Part 3957a ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×10
  • Brick 1 x 8 White Part 3008 Element 6550134 or 300801 ×2
  • Brick 2 x 4 White Part 3001 Element 6552094 or 300101 ×1
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] White Part 3660 Element 366001 ×3
  • Cone 1 x 1 [No Top Groove] White Part 4589 Element 458901 ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun White Part 4349 Element 434901 ×1
  • Hinge Brick 1 x 2 Base White Part 3937 Element 6619287 or 393701 ×1
  • Hinge Brick 1 x 2 Top Plate Thin White Part 3938 Element 393801 ×1
  • Hinge Vehicle Roof 4 x 4 White Part 4213 Element 4256454 or 421301 ×1
  • Hinge Vehicle Roof Holder 1 x 4 White Part 4315 Element 4214079 or 4190507 ×1
  • Plate 1 x 1 White Part 3024 Element 6548262 or 302401 Also in Trans-Clear ×2
  • Plate 1 x 10 White Part 4477 Element 6552113 or 6550148 ×3
  • Plate 1 x 2 White Part 3023 Element 6552100 or 6548261 ×7
  • Plate 1 x 4 White Part 3710 Element 6552108 or 6548266 ×4
  • Plate 1 x 6 White Part 3666 Element 6552107 or 6548265 ×1
  • Plate 2 x 2 Corner White Part 2420 Element 6548254 or 242051 ×2
  • Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×2
  • Plate 6 x 6 White Part 3958 Element 6552116 or 4144012 ×1
  • Plate Round 1 x 1 with Solid Stud White Part 6141 Element 6601919 or 614101 1 spare in the box Also in Trans-Clear ×10
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] White Part 4081b Element 6281990 or 4632566 ×2
  • Plate Special 1 x 2 with Ladder White Part 4175 Element 6317345 or 417501 ×4
  • Steering Stand 1 x 2 with Black Steering Wheel White Part 3829c01 Element 4208543 or 9551 ×1
  • Tile 1 x 4 with Groove White Part 2431 Element 6548255 or 243101 ×9
  • Tile Special 1 x 2 Grille with Bottom Groove White Part 2412b Element 6601902 or 241201 ×4
  • Wedge Plate 3 x 6 Cut Corners White Part 2419 Element 6552090 or 241901 ×2

Light Gray 49 pieces

  • Brick 1 x 6 Light Gray Part 3009 Element 300902 ×4
  • Brick 1 x 8 Light Gray Part 3008 Element 300802 ×4
  • Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Light Gray Part 3660 Element 366002 ×4
  • Dish 4 x 4 Inverted [Radar] Light Gray Part 3960 Element 4143013 or 396002 ×1
  • Hinge Plate 1 x 2 with 3 Fingers [Hollow Studs] Light Gray Part 4275b Element 427502 ×6
  • Hinge Tile 1 x 2 1/2 with 2 Fingers on Top Light Gray Part 4531 Element 4256463 or 4163772 ×6
  • Lever Small Base with Light Gray Lever Light Gray Part 298c03 Element 73777 1 spare in the box ×9
  • Plate 1 x 8 Light Gray Part 3460 Element 346002 ×2
  • Plate 2 x 8 Light Gray Part 3034 Element 303402 ×2
  • Plate 4 x 12 Light Gray Part 3029 Element 302902 ×1
  • Plate 4 x 8 Light Gray Part 3035 Element 303502 ×1
  • Plate 6 x 12 Light Gray Part 3028 Element 302802 ×2
  • Plate 6 x 8 Light Gray Part 3036 Element 303652 or 303602 ×1
  • Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Light Gray Part 2479 Element 247902 ×1
  • Tile 1 x 2 with Video Tape and Reels Print Light Gray Part 3069bpr0020 Element 81466 ×1
  • Turntable 2 x 2 Plate - Top Light Gray Part 3679 Element 367952 or 367902 ×4

Black 48 pieces

  • Brick 2 x 2 Black Part 3003 Element 4103587 or 300326 ×1
  • Brick 2 x 3 Black Part 3002 Element 300226 ×2
  • Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×2
  • Brick Sloped 45° 2 x 2 with White Phone Print Black Part 3039pr0012 Element 81124 ×1
  • Brick Sloped Inverted 45° 2 x 1 Black Part 3665 Element 366526 ×2
  • Brick Special 1 x 1 with Headlight Black Part 4070 Element 407026 ×2
  • Brick Special 2 x 6 x 2 Weight with Sealed Bottom and Dimples on Ends Black Part 73090b Element 6094053 or 73843 ×3
  • Equipment Control Panel Black Part 2342 Element 4164402 or 234226 ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×1
  • Hinge Brick 1 x 2 Base Black Part 3937 Element 393726 ×4
  • Hinge Brick 1 x 2 Top Plate Thin Black Part 3938 Element 393826 ×4
  • Lever Small Base with Black Lever Black Part 298c02 Element 73587 1 spare in the box ×2
  • Plate 1 x 10 Black Part 4477 Element 447726 ×2
  • Plate 1 x 2 Black Part 3023 Element 302326 ×3
  • Plate 1 x 6 Black Part 3666 Element 366626 ×2
  • Plate 2 x 10 Black Part 3832 Element 383226 ×1
  • Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] Black Part 4081b Element 6281993 or 4632571 ×2
  • Plate Special 1 x 2 with 1 Stud without Groove (Jumper) Black Part 3794a ×4
  • Propeller 3 Blade Small Black Part 2421 Element 6170693 or 4289255 ×1
  • Tile 1 x 8 with Groove Black Part 4162 Element 416226 ×2
  • Tile Special 1 x 2 with Handle Black Part 2432 Element 243226 ×2
  • Tile Special 2 x 2 with Top Pin Black Part 2460 Element 4258354 or 246026 ×1
  • Turntable 2 x 2 Plate, Base Black Part 3680 Element 368076 or 368026 ×2
  • Weapon Axe Black Part 3835 Element 383526 ×1

Yellow 33 pieces

  • Bar 1 x 6 [Open Studs] Yellow Part 4873 ×2
  • Brick Round 1 x 1 Open Stud Yellow Part 3062b Element 306844 or 306224 ×11
  • Cone 1 x 1 [No Top Groove] Yellow Part 4589 Element 458924 ×2
  • Equipment Goblet / Glass Yellow Part 2343 Element 626924 or 234324 ×5
  • Flexible Hose 8.5L with Tabless Ends Black (Ends different color than Tube) Yellow Part 73590c01b ×2
  • Plate 1 x 3 Yellow Part 3623 Element 362324 ×2
  • Plate 2 x 3 Yellow Part 3021 Element 302124 ×3
  • Seat / Chair 2 x 2 Yellow Part 4079 ×2
  • Tap 1 x 1 with Hole in Spout Yellow Part 4599a Element 459924 ×4

Trans-Light Blue 9 pieces

  • Glass for Window 1 x 2 x 2 Plane Trans-Light Blue Part 4862 Element 486242 ×6
  • Windscreen 2 x 4 x 2 Inverted Trans-Light Blue Part 4284 Element 4159264 ×2
  • Windscreen 4 x 4 x 4 1/3 Helicopter Trans-Light Blue Part 2483 Element 4188185 or 248342 ×1

Trans-Dark Blue 5 pieces

  • Brick Round 1 x 1 Open Stud Trans-Dark Blue Part 3062b Element 6514233 or 6238044 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Dark Blue Part 6141 Element 6514055 or 6240214 1 spare in the box ×4

Trans-Yellow 5 pieces

  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 2 spares in the box ×5

Blue 4 pieces

  • Brick Sloped 75° 2 x 1 x 3 with Open Stud Blue Part 4460a ×2
  • Brick Sloped 75° 2 x 2 x 3 [Hollow Studs] Blue Part 3684 Element 4248061 or 4219959 ×2

Trans-Clear 4 pieces

  • Plate 1 x 1 Trans-Clear Part 3024 Element 6513962 or 6252041 Also in White ×2
  • Plate Round 1 x 1 with Solid Stud Trans-Clear Part 6141 Element 6514052 or 6240030 Also in White ×2

Trans-Red 3 pieces

  • Plate 1 x 1 Trans-Red Part 3024 Element 6513963 or 6252042 ×2
  • Tile 1 x 1 with Groove Trans-Red Part 3070b Element 6581817 or 6254248 1 spare in the box ×1

Trans-Green 2 pieces

  • Plate 1 x 1 Trans-Green Part 3024 Element 6513967 or 6252046 ×1
  • Tile 1 x 1 with Groove Trans-Green Part 3070b Element 6581818 or 6254249 ×1

[No Color/Any Color] 1 piece

  • Sticker Sheet for Set 4031-1 [No Color/Any Color] Part 163184 ×1

Minifigures 4 figures

  • Fireman, Blue Jacket with Zipper, Black Helmet, Yellow Life Vest Minifigure, checked as a whole figure ×2
  • Man, Blue Suit with Tie and Three Buttons, Black Hat Minifigure, checked as a whole figure ×1
  • Man, Blue Jacket with Zipper, Blue Legs, Black Helmet with Visor 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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