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The Workshop Sheet 10 of 22

LEGO Missing Piece Checker

Enter a set number, mark each piece found or missing, and leave with a list of what is missing, the element IDs LEGO asks for and links to buy the parts. It is free and needs no account. Rule out the usual hiding places first.

Ultimate Accessories

Checking

3801 Ultimate Accessories

45 pieces in 24 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

Black 15 pieces

  • Control Unit, RCX Remote Black Part upn0200 ×1
  • Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole Black Part 32184 Element 6276951 or 4121667 ×2
  • Technic Beam 1 x 15 Thick Black Part 32278 Element 4542573 or 4128603 ×2
  • Technic Beam 1 x 5 Thick Black Part 32316 Element 4142135 or 4140429 ×2
  • Technic Beam 1 x 7 with Fan Black Part 32177 Element 4586837 or 4260659 ×2
  • Technic Beam 1 x 9 Bent (7 - 3) Thick Black Part 32271 Element 6276835 or 4140327 ×2
  • Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin Black Part 32250 Element 6327162 or 4128557 ×2
  • Wire with Brick 2 x 2 x 2/3 Pair, 20L Black Part 5306bc020 Element 4100355 ×2

Yellow 6 pieces

  • Large Figure Skeletal, Limb, Angular, 2 x 7 with 2 Ball Joints Yellow Part 32173 Element 4528082 or 4193775 ×2
  • Technic Axle Connector 2 x 3 with Ball Socket, Open Sides Yellow Part 32174 Element 4120123 ×4

Light Gray 5 pieces

  • Sensor, Touch Light Gray Part 879 Element 4247135 or 4209116 ×1
  • Technic Axle and Pin Connector Perpendicular Double Light Gray Part 32291 Element 4140339 ×2
  • Technic Beam Triangle Thin [Type I] Light Gray Part 2905 Element 4142539 or 290502 ×2

Trans-Dark Blue 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Dark Blue Part 3065 Element 6514264 or 6244906 ×2
  • Brick Round 1 x 1 Open Stud Trans-Dark Blue Part 3062b Element 6514233 or 6238044 ×2

Trans-Green 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Green Part 3065 Element 6514266 or 6244908 ×2
  • Brick Round 1 x 1 Open Stud Trans-Green Part 3062b Element 6514234 or 6238046 ×2

Trans-Red 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Red Part 3065 Element 6514263 or 6244905 ×2
  • Brick Round 1 x 1 Open Stud Trans-Red Part 3062b Element 6514235 or 6238673 ×2

Trans-Yellow 4 pieces

  • Brick 1 x 2 without Bottom Tube Trans-Yellow Part 3065 Element 6514265 or 6244907 ×2
  • Brick Round 1 x 1 Open Stud Trans-Yellow Part 3062b Element 6514236 or 6238674 ×2

Blue 1 piece

  • Sensor, Rotation Blue Part 2977c01 Element 4119420 ×1

Chrome Silver 1 piece

  • Dish 2 x 2 x 2/3 Light Reflector Chrome Silver Part 71128 Element 71128 ×1

White 1 piece

  • Light Brick 1 x 2 with Single Side Light White Part 6035 Element 4603220 or 74880 ×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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