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
42 pieces in 21 part and color combinations.
LEGO counts 41 pieces. This inventory comes from a separate parts catalog and lists 42; 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 (8561) and each piece's element ID, both listed above.
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Large Figure Foot, with Ball Joint Socket 2 x 3 x 5
×2
Large Figure Shield 5 x 5 with Dual Round Prongs
×2
Large Figure Skeletal, Limb 1 x 3 x 7 Beam with Axle Holes (Bohrok)
×2
Large Figure Skeletal, Torso, Beam 2 x 4 x 7 Angled
×2
Technic Axle 3
×5
Technic Axle 5
×1
Technic Axle 6
×2
Technic Axle Connector 2 x 3 with Ball Socket, Open Sides
×6
Technic Pin with Friction Ridges Lengthwise and Towball - Square Pin Hole
×2
Windscreen Bohrok 4 x 5 x 7 Marbled Trans-Clear Pattern
×1
Large Figure Mask Holder Krana 3 x 4
×1
Technic Arm 1 x 7 with 9 Tooth Double Bevel Gear Ends
×2
Technic Arm 2 x 5 with 1/4 Gear 8 Tooth Double Bevel
×1
Technic Pin Long without Friction Ridges - Single Slot
×1
Large Figure Skeletal, Limb, Angular 90°, 4 x 4 x 2 with 2 Ball Joints, and Axle Hole
×4
Packaging Lid Clip, Bionicle
×1
Packaging, Lid, Canister Top, Bionicle
×1
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside]
×2
Large Figure Weapon, Claw / Tooth / Hook 2 x 3 with Axle and Hole
×2
Technic Rubber Belt Medium [24mm ID] [Round Cross Section]
×1
Packaging, Canister / Display Box, Bionicle with set 8561-1 Print (Sticker)
×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.
