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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.
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 (71049-5) and each piece's element ID, both listed above.
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Bar, Curved U-Shape 2 x 3
×1
Plate Special Round 1 x 1 with Hollow Stud and Bar on Underside - Long Space
1 spare in the box
×1
Tile 1 x 2 with White 'ASTON MARTIN' Print
×1
Tile Special 1 x 2 with Minifig Neck Pin
×1
Tyre 14 x 6 Solid Smooth
×4
Vehicle Base 3 x 9 (Formula 1 CMF)
×1
Vehicle Body, Front Fender 1 x 4, Formula 1
×1
Brick Curved 2 x 1 No Studs with White Aston Martin Logo, Yellow Lines, Black Triangles Print
×1
Brick Curved 2 x 1 No Studs with Yellow Lines Print
×2
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)
1 spare in the box
×1
Helmet, Formula 1 with Trans-Yellow Visor Pattern and Black Stripes Print
×1
Plate 1 x 1
1 spare in the box
×1
Plate Special 1 x 1 with Clip Horizontal [Thick Open O Clip]
×1
Tile Round 1 x 1 Quarter
1 spare in the box
×2
Tile Special Round 1 x 1 with Hollow Bar
1 spare in the box
×1
Minifig Head [Plain] [Vented Stud - 2 Holes]
×1
Technic Axle Pin without Friction Ridges Lengthwise
×4
Wheel 11 x 8 with Center Groove, One Smooth Side with Black Circles Print
×4
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.
