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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.

Checking

42125 Ferrari 488 GTE "AF Corse #51"

1,684 pieces in 239 part and color combinations.

LEGO counts 1,677 pieces. This inventory comes from a separate parts catalog and lists 1,684; the two do not always count the same elements, so their totals differ. 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.

Every bag and the box. Shake out each bag, check its corners and seams, and look inside the empty box.
Inside what you have built. Small pieces lodge inside tubes, under plates and between studs. Turn the model over and look.
The last few steps. Compare each recent step with its parts callout. A piece used in the wrong place earlier leaves you one short later.
Look-alike colors. 1 part in this set come in two colors that are easy to mix up; they are listed below.
The spare pieces. Many sets include a few extra small pieces. Check them before you order a replacement.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

Look-alike colors in this set

These parts appear in this set in two colors that are easy to confuse. If you are one short in one color, check whether it went in where the other color belongs. Each color has its own element ID in the parts list at the back of the instructions.

Technic Beam 1 x 7 Thick Black ×13 Dark Bluish Gray ×10 Black is darker than Dark Bluish Gray.

Piece checklist

Technic Bushes 51 pieces

Technic Bush Light Bluish Gray Part 3713 Element 6275844 or 6271817 ×18
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Light Bluish Gray Part 32123b Element 6271165 or 4211573 ×33

Plates Special 17 pieces

Bracket 1 x 2 - 1 x 2 Inverted Black Part 99780 Element 6020193 ×1
Plate Special 1 x 2 with Pin Hole Underneath Black Part 18677 Element 6192309 or 6167497 ×11
Plate Special 2 x 2 with 1 Pin Hole [Complete Underside Rib] Black Part 10247 Element 6061032 ×3
Plate Special 4 x 6, Studs on 3 Edges Black Part 6180 Element 4100378 or 618026 ×2

Tubes and Hoses 14 pieces

Axle Hose, Soft 16L Black Part 32202 Element 6057525 or 4121649 ×1
Axle Hose, Soft 7L Black Part 32580 Element 6132744 ×6
Hose Rigid 3mm D. 11L / 8.8cm Light Bluish Gray Part 75c11 Element 6411673 or 6191989 ×2
Axle Hose, Soft 19L Red Part 32235 Element 4614802 or 4227553 ×2
Axle Hose, Soft 7L Red Part 32580 Element 6334708 or 4569751 ×2
Axle Hose, Soft 12L White Part 32200 Element 4296264 or 4227522 ×1

Technic Gears 12 pieces

Technic Gear 12 Tooth Double Bevel Black Part 32270 Element 4177431 ×2
Technic Gear Rack 1 x 7 with Axle and Pin Holes Black Part 87761 Element 6327430 or 4562009 ×1
Technic Gear 8 Tooth [Reinforced] Dark Bluish Gray Part 10928 Element 6631413 or 6012451 ×2
Technic Gear Differential with Inner Tabs and Closed Center, 28 Bevel Teeth [Beveled Edge] Dark Bluish Gray Part 62821b Element 4562210 or 4525184 ×1
Technic Gear 16 Tooth Reinforced [New Style] Light Bluish Gray Part 94925 Element 4640536 ×2
Technic Gear 12 Tooth Bevel Tan Part 6589 Element 4565452 or 4514556 ×3
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] Tan Part 18575 Element 6346517 or 6084724 ×1

Bars, Ladders and Fences 10 pieces

Bar 1L with Clip [Cut Edges and One Side Hole] [Gap in Clip] Black Part 48729b Element 6278152 or 6037347 ×6
Bar 4L (Lightsaber Blade / Wand) Black Part 30374 Element 6116604 or 4140303 ×4

Technic Bricks 10 pieces

Technic Brick 1 x 1 with Pin Hole Black Part 6541 Element 654126 ×5
Technic Brick 1 x 2 [2 Pin Holes] Black Part 32000 Element 3200026 ×1
Technic Brick 1 x 2 with Axle Hole Type 1 [+ Opening] and Bottom Pin Black Part 32064a Element 6178922 or 4233487 ×2
Technic Pin Connector Block 1 x 5 x 3 Black Part 32333 Element 6271358 or 4141810 ×2

Bricks Wedged 9 pieces

Brick Wedged, Curved 2 x 1 with Stud Notch Left Black Part 29120 Element 6181720 ×2
Brick Wedged, Curved 2 x 1 with Stud Notch Right Black Part 29119 Element 6181713 ×2
Brick Wedged, Curved 4 x 3 No Studs [Plain] Black Part 64225 Element 6009018 or 4539743 ×1
Brick Wedged, Curved 2 x 1 with Stud Notch Left Blue Part 29120 Element 6172414 ×2
Brick Wedged, Curved 2 x 1 with Stud Notch Right Blue Part 29119 Element 6172411 ×2

Technic Beams Special 9 pieces

Technic Beam Frame 11 x 15 Black Part 39790 Element 6295161 ×1
Technic Beam Frame 7 x 11 Black Part 39794 Element 6265643 ×3
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick Light Bluish Gray Part 64178 Element 4540797 ×1
Technic Beam 3 x 0.5 Liftarm with Boss and Blocked, Squared Pin Hole Red Part 61408 Element 6331864 ×2
Technic Beam 3 x 5 Thick [90° Offset Centre Beam Holes] Red Part 14720 Element 6534281 or 6185105 ×2

Bricks Round and Cones 8 pieces

Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Black Part 25214 Element 6179182 ×4
Brick Round 1 x 1 diameter Tube with 90 Degree Elbow (2 x 2 x 1) and Axle Holes (Crossholes) at each end Flat Silver Part 25214 Element 6335563 ×2
Brick Round 2 x 2 with Axle Hole Trans-Red Part 3941 Element 6514289 or 6334501 ×2

Plates Round Curved and Dishes 8 pieces

Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×4
Plate Special 1 x 2 Rounded with 2 Open Studs Red Part 35480 Element 6210269 ×2
Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Trans-Red Part 2654 Element 6581776 or 6254635 ×2

Wheels and Tyres 8 pieces

Tyre 68.8 x 36 ZR Black Part 44771 Element 6062225 or 4614801 ×4
Wheel 56 x 34 Technic Racing Medium with 6 Pin Holes, Open Spokes Black Part 49294 Element 6257076 ×4

Technic Special 6 pieces

Technic Cam Black Part 6575 Element 4143187 ×2
Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] Black Part 48267 Element 6288220 ×2
Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] Red Part 48267 Element 6285599 ×2

Flags, Banners and Signs 4 pieces

Flag 2 x 2 Trapezoid with Flat Area between Clips White Part 44676 Element 6023099 or 4507191 ×4

Bricks Curved 3 pieces

Brick Curved 4 x 2 No Studs Black Part 93606 Element 4647286 ×1
Brick Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] Red Part 11153 Element 6583512 or 6045937 ×2

Plates Wedged 2 pieces

Wedge Plate 4 x 2 Left Black Part 41770 Element 4161332 ×1
Wedge Plate 4 x 2 Right Black Part 41769 Element 4160869 ×1

Stickers 2 pieces

Sticker Sheet 1 for Set 42125-1 [No Color/Any Color] Part 72212 Element 6323458 ×1
Sticker Sheet 2 for Set 42125-1 [No Color/Any Color] Part 77422 Element 6337818 ×1

Windscreens and Fuselage 2 pieces

Windscreen 6 x 4 x 1 Curved with Headlights, Grill, Red Bodywork Print Trans-Clear Part 18973pr0009 Element 6335199 ×1
Windscreen 6 x 4 x 1 Curved with Headlights, Grill, Red Bodywork Print Trans-Clear Part 18973pr0010 Element 6335200 ×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.

LEGO Missing Piece Checker

42125 Ferrari 488 GTE "AF Corse #51"

Before you call it missing

Look-alike colors in this set

Your missing list

Piece checklist

Technic Pins 623 pieces

Technic Beams 294 pieces

Technic Connectors 257 pieces

Technic Axles 138 pieces

Technic Panels 79 pieces