Free tool
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.
Checking
25 pieces in 19 part and color combinations.
LEGO counts 24 pieces. This inventory comes from a separate parts catalog and lists 25; the two do not always count the same elements, so their totals differ. Spare parts are counted in neither figure.
Builders who report a missing piece often find it in one of these places. Tick each one off as you look.
LEGO's request form asks for the set number (3590) and each piece's element ID, both listed above.
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Duplo Toolo Arm 2 x 6 with Triangular Set Screw and Clip Ends
×2
Duplo Toolo Brick 2 x 2 with Angled Bracket with Forks and Two Screws, Holes at Side
×2
Duplo Toolo Intelligent Brick Sound Key #2
×1
Duplo Toolo Sound Brick Type 1
×1
Duplo Toolo Wheel with Action Wheeler Screw
×4
Duplo Toolo Cockpit 4 x 6
×1
Duplo Toolo Digger Bucket with 3 teeth
×1
Duplo Toolo Drill Bit, with Pearl Light Gray End
×1
Duplo Toolo Intelligent Brick / Base
×1
Duplo Toolo Scoop 6 x 4 x 3
×1
Duplo Toolo Brick 2 x 4 with Holes on Sides and Top and 1 Screw in Top
×1
Duplo Tread, Thick Cleats
×2
Duplo Fuel Container 1 x 2 x 2
×1
Duplo Toolo Exhaust Pipe
×1
Duplo Windscreen Roll Cage
×1
Duplo Figure, Early, Cap Blue, Orange Legs with Belt, Pen, Chain, Radio, and Wrench Print (Action Wheeler)
×1
Duplo Toolo Tool Screwdriver
×1
Duplo Toolo Intelligent Brick Sound Key #3
×1
Sticker Sheet for Sets 3586-1, 3587-1, 3588-1, 3589-1, 3590-1
×1
Tick each piece as you find it, or mark it missing.
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 LEGOMark 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.
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.
