Free tool

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.

Lawnmower

Checking

40044 Lawnmower

25 pieces in 13 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.

Show

Piece checklist

Plates Special 8 pieces

  • Bracket 1 x 2 - 1 x 4 [Square Corners] Black Part 2436 Element 4282746 or 243626 ×2
  • Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×1
  • Plate Special 1 x 2 with Clips Horizontal [Thick U-Clips] Black Part 60470a Element 4537901 ×1
  • Plate Special 1 x 2 with 1 Stud with Groove (Jumper) Dark Bluish Gray Part 3794b Element 4211119 ×2
  • Plate Special 1 x 2 Side Handle [Free Ends] Red Part 2540 Element 4140585 or 254021 ×2

Bricks Sloped 5 pieces

  • Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Dark Bluish Gray Part 54200 Element 4504378 or 4244373 1 spare in the box ×5

Transportation - Land 4 pieces

  • Steering Wheel Small, 2 x 2 Black Part 30663 Element 4153044 ×4

Plates 2 pieces

  • Plate 1 x 1 Dark Bluish Gray Part 3024 Element 4210719 1 spare in the box ×1
  • Plate 2 x 4 Dark Bluish Gray Part 3020 Element 4211065 ×1

Plates Round Curved and Dishes 2 pieces

  • Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×2

Plates Wedged 2 pieces

  • Wedge Plate 2 x 4 Light Bluish Gray Part 51739 Element 4507056 or 4252368 ×2

Bars, Ladders and Fences 1 piece

  • Bar 1 x 4 x 3 [End Tabs] Black Part 62113 Element 4521681 ×1

Bricks Curved 1 piece

  • Brick Curved 2 x 2 x 2/3 Two Studs and Curved Slope End Red Part 47457 Element 4220515 ×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.