Checking

1649 Lego Motion 4B, Sea Skimmer

17 pieces in 13 part and color combinations.

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.

Brick 1 x 2 White ×2 Trans-Clear ×2 Trans-Clear is see-through: hold the piece up to a light.

Piece checklist

White 6 pieces

Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 Also in Trans-Clear ×2
Brick 2 x 2 White Part 3003 Element 6552095 or 6548256 ×1
Brick Sloped 33° 3 x 2 White Part 3298 Element 329801 ×1
Brick Special 1 x 2 with Pin White Part 2458 Element 4160228 or 245801 ×1
Plate 2 x 6 White Part 3795 Element 6550146 or 379501 ×1

Blue 4 pieces

Brick 2 x 4 Blue Part 3001 Element 300173 or 300123 ×1
Brick Sloped 45° 2 x 2 Blue Part 3039 Element 303923 ×1
Brick Sloped Inverted 33° 3 x 2, No Connections between Studs, Ovoid Bottom Pin Blue Part 3747a Element 4500460 or 374723 ×1
Propeller 4 Blade 5 Diameter with Rounded Ends, Open Hub Blue Part 2479 Element 4192952 or 247923 ×1

Yellow 4 pieces

Engine - Smooth, Small 1 x 2 Side Plate [With Axle Holders] Yellow Part 3475b Element 4500611 or 4215616 ×2
Plate 2 x 6 Yellow Part 3795 Element 379524 ×2

Trans-Clear 3 pieces

Brick 1 x 2 Trans-Clear Part 3004 Element 4256587 or 300410 Also in White ×2
Brick Sloped 45° 2 x 2 Trans-Clear Part 3039 Element 6514100 or 6244886 ×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

1649 Lego Motion 4B, Sea Skimmer

Before you call it missing

Look-alike colors in this set

Your missing list