BlockTalk Find Your Set

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.

Build My City Accessory Set

Checking

40170 Build My City Accessory Set

102 pieces in 78 part and color combinations.

LEGO counts 100 pieces. This inventory comes from a separate parts catalog and lists 102; 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.

Show

Piece checklist

Plates 14 pieces

  • Plate 1 x 3 Black Part 3623 Element 362326 ×2
  • Plate 4 x 4 Black Part 3031 Element 4243819 or 303126 ×1
  • Plate 1 x 2 Blue Part 3023 Element 302323 ×1
  • Plate 1 x 6 Blue Part 3666 Element 366623 ×1
  • Plate 2 x 4 Blue Part 3020 Element 4240375 or 302023 ×1
  • Plate 4 x 4 Green Part 3031 Element 4243821 or 4113158 ×1
  • Plate 2 x 3 Light Bluish Gray Part 3021 Element 4211396 ×1
  • Plate 2 x 4 Light Bluish Gray Part 3020 Element 4211395 ×2
  • Plate 4 x 4 Light Bluish Gray Part 3031 Element 4243797 or 4211403 ×3
  • Plate 2 x 4 Tan Part 3020 Element 4114309 or 302005 ×1

Plates Special 10 pieces

  • Plate Special 1 x 1 with Tooth Black Part 49668 Element 4273590 ×1
  • Plate Special 1 x 2 [Side Handle Closed Ends] Blue Part 48336 Element 4514398 or 4247103 ×2
  • Plate Special 2 x 2 with Groove and Center Stud (Jumper) Green Part 87580 Element 6389692 or 4565321 ×2
  • Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper) Light Bluish Gray Part 15573 Element 6066097 or 4211451 ×4
  • Plate Special 1 x 2 with Clips Horizontal [Open O Clips] Light Bluish Gray Part 60470b Element 6337268 or 4556157 ×1

Plants & Trees 8 pieces

  • Plant, 1 x 1 x 2/3 - 3 Large Leaves Bright Green Part 6255 Element 6269048 or 4107432 ×1
  • Plant, Apple Green Part 33051 Element 6596349 or 6145252 ×1
  • Plant, Flower Stem Green Part 3741 Element 6277589 or 374128 1 spare in the box ×1
  • Plant, Carrot Orange Part 33172 Element 6424015 or 6103249 ×1
  • Plant, Flower - Small Red Part 3742 1 spare in the box ×3
  • Plant, Banana Yellow Part 33085 Element 4114584 ×1

Plates Round Curved and Dishes 8 pieces

  • Plate Round 1 x 1 with Open Stud Black Part 85861 Element 6168646 or 6100627 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Blue Part 6141 Element 614123 1 spare in the box ×2
  • Dish 2 x 2 Inverted [Radar] Trans-Dark Blue Part 4740 Element 6580383 or 6398233 ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Green Part 6141 Element 6514057 or 6240221 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Orange Part 6141 Element 6514059 or 6240227 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Red Part 6141 Element 6514051 or 6208450 1 spare in the box ×1
  • Plate Round 1 x 1 with Solid Stud Trans-Yellow Part 6141 Element 6514056 or 6240216 1 spare in the box ×1

Bricks Special 7 pieces

  • Brick Special 1 x 1 with Stud on 1 Side Black Part 87087 Element 4558954 ×3
  • Brick Special 1 x 2 x 1 2/3 with 4 Studs on 1 Side Red Part 22885 Element 6135130 ×1
  • Brick Special 1 x 2 Palisade [aka Log] Tan Part 30136 Element 4218749 or 4114053 ×2
  • Brick Special 1 x 4 with 4 Studs on One Side White Part 30414 Element 6550167 or 4143254 ×1

Panels 7 pieces

  • Panel 1 x 1 x 1 Corner Tan Part 6231 Element 4612603 or 4568287 ×4
  • Panel 1 x 2 x 1 [Rounded Corners] Tan Part 4865b Element 6146221 ×2
  • Panel 1 x 2 x 3 [Side Supports / Hollow Studs] Trans-Brown Part 87544 Element 6507950 or 6239388 ×1

Tiles Round and Curved 6 pieces

  • Tile Round 1 x 1 Light Bluish Gray Part 98138 Element 6284071 or 4650260 1 spare in the box ×1
  • Tile Round 1 x 1 Quarter Light Bluish Gray Part 25269 Element 6176433 1 spare in the box ×4
  • Tile Round 1 x 1 Trans-Clear Part 98138 Element 6514191 or 6274738 1 spare in the box ×1

Hinges, Arms and Turntables 5 pieces

  • Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Blue Part 73983 Element 6102759 or 4119371 ×1
  • Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Light Bluish Gray Part 30553 Element 4222047 ×1
  • Hinge Plate 1 x 2 Locking with 1 Finger On End, without Groove Light Bluish Gray Part 44301b Element 6266231 ×1
  • Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth Light Bluish Gray Part 44302a Element 4211804 ×1
  • Hinge Plate 2 x 2 Locking with 1 Finger on Top Light Bluish Gray Part 92582 Element 6265742 or 4666449 ×1

Tiles 5 pieces

  • Tile 1 x 1 with Groove Light Bluish Gray Part 3070b Element 4211415 1 spare in the box ×1
  • Tile 1 x 2 with Groove Trans-Yellow Part 3069b Element 6514221 or 6251291 ×1
  • Tile 1 x 8 with Groove White Part 4162 Element 6552110 or 416201 ×1
  • Tile 2 x 2 with Groove White Part 3068b Element 6548263 or 306801 ×1
  • Tile 2 x 2 with Newspaper 'THE LEGO NEWS volume 3' Print White Part 3068bpr0201 Element 4655208 ×1

Bars, Ladders and Fences 4 pieces

  • Bar 1 x 4 x 3 [End Tabs] Dark Bluish Gray Part 62113 Element 4521886 ×1
  • Bar 1 x 12 with 1 x 2 Plate End with Hollow Studs and 1 x 1 Round Plate End Light Bluish Gray Part 99784 Element 6010686 1 spare in the box ×1
  • Bar 6L with Stop Ring Reddish Brown Part 63965 Element 6170468 or 6155727 ×1
  • Bar 1 x 4 x 2 with Studs Yellow Part 4083 Element 408324 ×1

Minifig Accessories 4 pieces

  • Equipment Shovel [Rounded Handle End] Dark Bluish Gray Part 3837 Element 4211006 ×1
  • Equipment Brush / Push Broom Reddish Brown Part 3836 Element 4211157 ×1
  • Equipment Bottle Trans-Clear Part 95228 Element 6507876 or 6247369 ×1
  • Equipment Cup / Mug [Plain] Yellow Part 3899 Element 389924 ×1

Bricks 3 pieces

  • Brick 1 x 2 Dark Tan Part 3004 Element 4521914 or 4497069 ×1
  • Brick 1 x 4 Dark Tan Part 3010 Element 6001822 or 4497072 ×1
  • Brick 1 x 2 White Part 3004 Element 6548257 or 4613964 ×1

Bricks Round and Cones 3 pieces

  • Brick Round 1 x 1 Open Stud Trans-Light Blue Part 3062b Element 6514238 or 6238677 ×1
  • Brick Round 1 x 1 Open Stud White Part 3062b Element 6619283 or 306201 ×1
  • Brick Round 2 x 2 Dome Bottom [Open Stud] White Part 15395 Element 6050914 ×1

Flags, Banners and Signs 3 pieces

  • Road Sign Clip-on 2.2 x 2.667 Triangular Light Bluish Gray Part 30259 Element 4211886 ×1
  • Road Sign Clip-on 2 x 2 Round White Part 30261 Element 6317571 or 4116816 ×1
  • Road Sign Clip-on 2 x 2 Square [Thick Open O Clip] White Part 15210 Element 6323185 or 6046383 ×1

Bricks Curved 2 pieces

  • Brick Curved 2 x 1 No Studs [1/2 Bow] Light Bluish Gray Part 11477 Element 6028813 ×1
  • Brick Curved 4 x 1 Double, No Studs White Part 93273 Element 6552143 or 6023806 ×1

Tiles Special 2 pieces

  • Tile Special 2 x 2 with Bar, Hollow Stud with Stop Ring (Flag Pole) Light Bluish Gray Part 98549 Element 6170708 or 6003098 ×2

Transportation - Land 2 pieces

  • Steering Wheel Small, 2 x 2 [Reinforced] Light Bluish Gray Part 16091 Element 6092956 or 6061697 ×1
  • Bicycle Frame, Reinforced Headlight [Hollow Stud] Medium Azure Part 65574 Element 6350702 ×1

Wheels and Tyres 2 pieces

  • Wheel Bicycle, Fixed Black Tire Trans-Clear Part 92851 Element 6503209 or 6163986 ×2

Windows and Doors 2 pieces

  • Window 1 x 4 x 3 without Shutter Tabs Dark Bluish Gray Part 60594 Element 4551044 ×1
  • Window 1 x 2 x 2 Flat Front Red Part 60592 Element 6382696 or 4521438 ×1

Animals / Creatures 1 piece

  • Animal, Frog Green Part 33320 Element 6171101 or 4157270 ×1

Containers 1 piece

  • Container Box 2 x 2 x 2 - Top Opening Green Part 61780 Element 4548102 ×1

Energy Effects 1 piece

  • Wave / Flame Rounded with Base Pegs Trans-Light Blue Part 6126a Element 4155537 or 612642 ×1

Minifig Shields, Weapons, & Tools 1 piece

  • Tool Jackhammer / Motor Hammer Dark Bluish Gray Part 30228 Element 4261117 or 4211083 ×1

Stickers 1 piece

  • Sticker Sheet for Set 40170-1 [No Color/Any Color] Part 34585 Element 6196674 ×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.

We value your privacy

We use cookies 🍪 for analytics and to improve your experience. Read our privacy policy