Free tool

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

4535 LEGO Express Deluxe

34 pieces in 11 part and color combinations.

LEGO counts 762 pieces. This inventory comes from a separate parts catalog and lists 34; 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. Compare each color with the step's parts callout, especially White against Trans-Clear.
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.

Piece checklist

Dark Gray 25 pieces

Vehicle Track, Train, 9V Curved Dark Gray Part 74747 Element 4190056 or 74747 ×16
Vehicle Track, Train, 9V Straight Dark Gray Part 74746 Element 4190054 or 74746 ×8
Wire with Brick 2 x 2 x 2/3 and Train Track Contacts Dark Gray Part 5306c01 Element 4226208 or 4142332 ×1

Black 7 pieces

Brick 1 x 2 Black Part 3004 Element 300426 ×1
Electric Adapter / Transformer, 120V 60Hz, Train Speed Regulator 9V Black Part 70931 Element 4236496 or 4227582 ×1
Hub / Controller, Train Speed Regulator 9V Black Part 2868b Element 4235345 or 70783 ×1
Motor, Train Base, 9V [Complete Assembly] Black Part 70358 Element 70358 ×1
Train Motor Decorative Side 10 x 2 x 2 with Closed Hub Points (for 9V Train Motor) Black Part 2871a ×2
Wire with Brick 2 x 2 x 2/3 Pair, 36L Black Part 5306bc036 Element 75652 ×1

Chrome Silver 1 piece

Dish 2 x 2 x 2/3 Light Reflector Chrome Silver Part 71128 Element 71128 ×1

White 1 piece

Light Brick 1 x 2 with Single Side Light White Part 6035 Element 4603220 or 74880 ×1

Tick each piece as you find it, or mark it missing.

Sets inside this set

This set packs other sets whose pieces are listed separately. Check each one:

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.