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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.

Mountain Police Chase

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10751 Mountain Police Chase

104 pieces in 74 part and color combinations, plus 2 minifigures.

The official piece count includes the 11 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 Special 13 pieces

  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×3
  • Plate Special 1 x 4 with Angled Tubes Flat Silver Part 61072 Element 4632100 ×1
  • Plate Special 1 x 2 with Clip Horizontal on Side Light Bluish Gray Part 11476 Element 6313114 or 6028812 ×1
  • Plate Special 2 x 2 with Wheel Holder Light Bluish Gray Part 4488 Element 6018081 or 4211496 ×1
  • Plate Special 9 x 16 x 2/3 with 1 x 4 Recessed Medium Nougat Part 18922 Element 6109775 ×1
  • Plate Special 2 x 2 with Wheels Holder Wide Red Part 6157 Element 6022740 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Tan Part 2540 Element 4140593 or 4125271 ×1
  • Plate Special 1 x 2, Top Clip [Split] White Part 92280 Element 4598527 ×1
  • Plate Special 1 x 2 with Bar Up [Horizontal Arm 5mm] Yellow Part 88072 Element 6261356 or 4611704 ×1
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Yellow Part 60470b Element 6337231 or 4556156 ×1

Tiles 13 pieces

  • Tile 2 x 2 with Police Badge Print Blue Part 3068bpr0348 Element 6210031 ×2
  • Tile 2 x 4 with 'Police', Badge, and White Line Print Blue Part 87079pr0136 Element 6209972 ×1
  • Tile 1 x 2 with '100' Banknote Print Green Part 3069bpr0100 Element 4295260 or 82317 ×3
  • Tile 1 x 2 with Red 82, Yellow and White Gauges Print Light Bluish Gray Part 3069bpr0101 Element 4227776 ×1
  • Tile 1 x 4 with Groove Tan Part 2431 Element 4550324 or 4542398 ×1
  • Tile 1 x 2 with Groove Trans-Dark Blue Part 3069b Element 6514219 or 6251289 ×2
  • Tile 1 x 2 with Groove Trans-Red Part 3069b Element 6514220 or 6251290 ×1
  • Tile 2 x 2 with Minifig Front Mugshot and 5000 Reward Poster Print White Part 3068bpr0346 Element 6210033 ×1
  • Tile 1 x 4 with Groove Yellow Part 2431 Element 243124 ×1

Plates 10 pieces

  • Plate 1 x 6 Black Part 3666 Element 366626 ×4
  • Plate 1 x 4 Reddish Brown Part 3710 Element 4211190 ×2
  • Plate 2 x 4 Reddish Brown Part 3020 Element 4211186 ×2
  • Plate 2 x 6 Tan Part 3795 Element 4113993 or 379505 ×1
  • Plate 3 x 3 Cross White Part 15397 Element 6099412 ×1

Bricks 8 pieces

  • Brick 1 x 2 Blue Part 3004 Element 4613959 or 300423 ×2
  • Brick 1 x 2 x 5 with Hollow Studs Blue Part 2454b Element 6055104 ×2
  • Brick 1 x 4 Blue Part 3010 Element 301023 ×1
  • Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×1
  • Brick 2 x 6 Dark Red Part 2456 Element 6089268 or 4496339 ×1
  • Brick 1 x 2 Yellow Part 3004 Element 4613966 or 300424 ×1

Wheels and Tyres 8 pieces

  • Tyre 21 x 12 with Offset Tread Small Wide and Center Band Black Part 87697 Element 6575727 or 4568644 ×4
  • Wheel 11 x 12 with Hole Notched for Wheels Holder Pin Light Bluish Gray Part 6014b Element 4211764 1 spare in the box ×4

Bricks Curved 7 pieces

  • Brick Curved 2 x 2 with Lip, No Studs with Rugged Gray Strip and Yellow Lights Print Black Part 30602pr0007 Element 6210061 ×1
  • Brick Curved 4 x 1 Double, No Studs Blue Part 93273 Element 4649773 ×1
  • Brick Curved 2 x 2 with Lip, No Studs Trans-Dark Blue Part 30602 Element 6171721 or 6134912 ×2
  • Brick Curved 2 x 2 with Lip, No Studs White Part 30602 Element 4195869 ×2
  • Brick Curved 3 x 1 No Studs Yellow Part 50950 Element 4247771 ×1

Bricks Special 7 pieces

  • Brick Special 1 x 4 with 4 Studs on One Side Light Bluish Gray Part 30414 Element 4211636 ×1
  • Brick Special 1 x 2 Palisade [aka Log] Reddish Brown Part 30136 Element 4211180 ×4
  • Brick Special 1 x 2 with Vertical Clip [Open O Clip] White Part 30237b Element 6320300 or 6092873 ×2

Minifig Accessories 5 pieces

  • Equipment Radio [Extended Handle, Expanded Speaker Grille] Black Part 19220 Element 6170545 or 6100054 ×1
  • Equipment Weapon, Loudhailer / Speaker / Blaster / Space Gun Black Part 4349 Element 434926 ×1
  • Equipment Telescope / Torch / Spyglass, Support Round 1 x 1 x 1 2/3 Dark Brown Part 64644 Element 4538950 ×1
  • Equipment Handcuffs Light Bluish Gray Part 61482 Element 6173615 or 4641048 1 spare in the box ×1
  • Equipment Cup / Mug [Plain] Red Part 3899 Element 389921 ×1

Transportation - Land 5 pieces

  • Steering Wheel Small, 2 x 2 [Reinforced] Black Part 16091 Element 6057397 ×1
  • Steering Stand 1 x 2 with Black Steering Wheel Light Bluish Gray Part 3829c01 Element 4226995 ×1
  • Mudguard 2 x 4 with 2 x 2 Studs and Flared Wings Red Part 41854 Element 6109466 or 4163394 ×2
  • Seat / Chair 2 x 2 with Center Sprue Mark Reddish Brown Part 4079b ×1

Transportation - Sea and Air 4 pieces

  • Propeller 3 Blade Small Black Part 2421 Element 6170693 or 4289255 ×1
  • Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Black Part 2479 Element 247926 ×1
  • Helicopter Body 4 x 14 x 5 with Top Pin Blue Part 19000 Element 6210366 ×1
  • Helicopter Skid Rails 12 x 6 Dark Bluish Gray Part 30248 Element 6259802 or 4546207 ×1

Windows and Doors 4 pieces

  • Door Frame 1 x 4 x 6 Type 2 Dark Bluish Gray Part 60596 Element 6262942 or 4535833 ×1
  • Door Frame 2 x 4 x 6 Light Bluish Gray Part 60599 Element 6170385 ×1
  • Door 1 x 4 x 6 Barred with Stud Handle Pearl Titanium Part 60621 Element 6037634 ×1
  • Glass for Window 1 x 4 x 3 - Opening with ATV Red Warning Square Against Mountains and Field with Trees Print Trans-Light Blue Part 60603pr0006 Element 6254135 or 6210003 ×1

Bars, Ladders and Fences 3 pieces

  • Fence Spindled 1 x 4 x 2 [4 Top Studs] Reddish Brown Part 15332 Element 6066114 ×2
  • Bar 7 x 3 with Double Clips (Ladder) [Straight Clips] Yellow Part 6020 Element 6070784 or 4240376 ×1

Bricks Round and Cones 3 pieces

  • Brick Round 1 x 1 Open Stud Light Bluish Gray Part 3062b Element 4211412 ×2
  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×1

Bricks Sloped 3 pieces

  • Brick Sloped 45° 2 x 4 Dark Bluish Gray Part 3037 Element 4211127 ×2
  • Brick Sloped 45° 2 x 1 with Bottom pin, with Green and Red Buttons and Keypad Print Light Bluish Gray Part 3040bpr0003 Element 4228198 ×1

Containers 2 pieces

  • Box 2 x 2 x 2 [Hollow Studs] Light Bluish Gray Part 4345b Element 4211491 ×1
  • Box 2 x 2 x 2 Door with Slot Trans-Clear Part 4346 Element 6499105 or 6247357 ×1

Minifig Lower Body 1 piece

  • Leg Skeleton Black Part 6266 Element 6240496 or 6038453 1 spare in the box ×1

Minifig Shields, Weapons, & Tools 1 piece

  • Tool Crowbar Red Part 92585 Element 4599453 ×1

Panels 1 piece

  • Panel 1 x 6 x 6 with Window White Part 15627 Element 6055192 ×1

Plants & Trees 1 piece

  • Plant, Round 1 x 1 - 3 Bamboo Leaves Green Part 30176 Element 6270003 or 6248461 ×1

Plates Round Curved and Dishes 1 piece

  • Plate Round Corners 2 x 6 Double Green Part 18980 Element 6133852 ×1

Rock 1 piece

  • Rock Panel 2 x 4 x 6 Dark Bluish Gray Part 47847 Element 4513326 ×1

String, Bands and Reels 1 piece

  • Chain 16L [21 Links] Dark Bluish Gray Part 60169 Element 6258887 or 4516456 ×1

Supports, Girders and Cranes 1 piece

  • Hook with Towball Dark Bluish Gray Part 30395 Element 30395199 or 6347464 ×1

Windscreens and Fuselage 1 piece

  • Windscreen 4 x 4 x 4 2/3 with Handle Trans-Light Blue Part 11289 Element 6280333 or 6019162 ×1

Minifigures 2 figures

  • Policeman, Dark Blue Shirt with Radio and Badge, Dark Tan Legs, White Helmet with Visor Minifigure, checked as a whole figure ×1
  • Criminal, Prison Shirt with #86753, Dark Bluish Gray Legs, Reddish Brown Helmet with Goggles, Dark Tan Backpack, Beard 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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