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.
4,776 pieces in 444 part and color combinations, plus 2 minifigures.
The official piece count includes the 8 parts inside the set's minifigures, which this inventory lists separately. 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.
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.
Tile 1 x 2 with GrooveWhite ×2Trans-Clear ×1Trans-Clear is see-through: hold the piece up to a light.
Brick 1 x 3Black ×2Dark Bluish Gray ×4Black is darker than Dark Bluish Gray.
Plate 2 x 16Black ×6Dark Bluish Gray ×34Black is darker than Dark Bluish Gray.
Plate 2 x 3Black ×6Dark Bluish Gray ×8Black is darker than Dark Bluish Gray.
Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)Black ×2Dark Bluish Gray ×51Black is darker than Dark Bluish Gray.
Windscreen 5 x 2 x 1 2/3Light Bluish GrayPart 6070Element 6262077 or 4550285×4
Technic Steering, Suspension and Engine
2 pieces
Technic Steering Arm 5 x 1 with Towball Socket (Type2)Light Bluish GrayPart 31794Element 6247352×2
Pneumatics
1 piece
Pneumatic T-Piece (T Bar) [New Style]BlackPart 4697bElement 61042091 spare in the box×1
Stickers
1 piece
Sticker Sheet for Set 75252-1[No Color/Any Color]Part 64983Element 6277350×1
Tools
1 piece
Brick and Axle Separator v2.0OrangePart 96874Element 6240515 or 4654448×1
Minifigures
2 figures
Imperial Crew, Light Bluish Gray Uniform, Dark Bluish Gray Cap, Printed ArmsMinifigure, checked as a whole figure×1
Imperial Officer / Lieutenant, Dark Bluish Gray Uniform, Dual Molded LegsMinifigure, checked as a whole figure×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.
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.