Missing Piece Checker: 4958 Monster Dino

Checking

4958 Monster Dino

792 pieces in 136 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. Compare each color with the step's parts callout, especially White against Trans-Clear.
The spare pieces. This set comes with 9 spare pieces, marked on each row of the checklist. One may be the piece you need.
The floor and your building area. Check under furniture, the chair and the edges of your building surface.

Piece checklist

Technic Pins 152 pieces

Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots Black Part 6558 Element 655826 ×46
Technic Pin with Friction Ridges Lengthwise and Center Slots Black Part 2780 Element 4121715 or 278026 1 spare in the box ×32
Technic Axle Pin with Friction Ridges Lengthwise Blue Part 43093 Element 4309323 or 4206482 1 spare in the box ×23
Technic Pin 3/4 Dark Bluish Gray Part 32002 Element 32002199 or 4211050 1 spare in the box ×10
Technic Pin Long without Friction Ridges - Single Slot Light Bluish Gray Part 32556a Element 4211709 ×8
Technic Pin without Friction Ridges Lengthwise Light Bluish Gray Part 3673 Element 4211807 or 3673194 1 spare in the box ×15
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] Red Part 32054 Element 4140806 or 4125198 ×4
Technic Axle Pin without Friction Ridges Lengthwise Tan Part 3749 Element 4666579 or 4186017 1 spare in the box ×14

Bricks Sloped 74 pieces

Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Black Part 54200 Element 4504382 or 4287159 ×18
Brick Sloped 33° 3 x 1 Black Part 4286 Element 428626 ×12
Brick Sloped 45° 2 x 1 with Bottom Pin Black Part 3040b Element 4121966 or 304026 ×6
Brick Sloped Inverted 34° 3 x 1 with Internal Stopper Light Bluish Gray Part 4287b ×10
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) Lime Part 54200 Element 4504372 or 4298015 ×19
Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] Red Part 3660 Element 366021 ×3
Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) White Part 54200 Element 6550179 or 4504369 ×6

Technic Bricks 50 pieces

Technic Brick 1 x 10 [9 Pin Holes] Black Part 2730 Element 273026 ×4
Technic Brick 1 x 6 [5 Pin Holes] Black Part 3894 Element 389426 ×8
Technic Brick 1 x 12 [11 Pin Holes] Dark Bluish Gray Part 3895 Element 4210963 ×2
Technic Brick 1 x 2 [2 Pin Holes] Dark Bluish Gray Part 32000 Element 4210762 ×2
Technic Brick 1 x 4 [3 Pin Holes] Dark Bluish Gray Part 3701 Element 4213607 or 370127 ×10
Technic Slope Short (Wing Front) Dark Bluish Gray Part 2743 Element 4273814 ×8
Technic Brick 1 x 2 [1 Pin Hole] Light Bluish Gray Part 3700 Element 4211440 ×4
Technic Brick 1 x 8 [7 Pin Holes] Light Bluish Gray Part 3702 Element 4211442 ×8
Technic Brick 1 x 1 with Pin Hole White Part 6541 Element 6609542 or 654101 ×4

Plates Special 44 pieces

Plate Special 1 x 2 [Side Handle Closed Ends] Black Part 48336 Element 4225201 ×2
Technic Plate 2 x 6 [5 Holes] Black Part 32001 Element 3200126 ×1
Bracket 1 x 2 - 2 x 2 Dark Bluish Gray Part 44728 Element 6117972 or 6048854 ×4
Bracket 1 x 2 - 1 x 4 [Square Corners] Red Part 2436 Element 4282742 or 243621 ×7
Plate Special 1 x 1 with Clip Horizontal [Thick U Clip] Red Part 6019 Element 601971 or 601921 ×4
Plate Special 1 x 1 with Tooth White Part 49668 Element 6601935 or 4224792 ×26

Plates Round Curved and Dishes 31 pieces

Plate Round 2 x 2 with Rounded Bottom [Boat Stud] Dark Bluish Gray Part 2654 Element 4613980 or 4278274 ×4
Plate Round 1 x 1 with Solid Stud Lime Part 6141 Element 4183133 1 spare in the box ×24
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) Red Part 4032a Element 403221 ×3

Hinges, Arms and Turntables 24 pieces

Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth Black Part 30553 Element 4143372 ×9
Hinge Cylinder 1 x 3 Locking with 1 Finger and Technic Friction Pin with Round Hole Black Part 41532 Element 4159335 ×1
Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] Dark Bluish Gray Part 73983 Element 6102774 or 4271344 ×2
Hinge Plate 2 x 4 with Articulated Joint - Female Dark Bluish Gray Part 3640 Element 4265486 or 4237555 ×2
Hinge Plate 2 x 4 with Articulated Joint - Male Dark Bluish Gray Part 3639 Element 4264952 or 4237553 ×2
Hinge Plate 1 x 2 Locking with 1 Finger On Top Green Part 30383 Element 4561793 or 4183128 ×6
Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove Yellow Part 44567a Element 4185617 ×2

Bricks Wedged 20 pieces

Brick Wedged, Angled 4 x 2 Left Black Part 41768 Element 6078889 or 4644755 ×1
Brick Wedged, Angled 4 x 2 Right Black Part 41767 Element 6078886 or 4644754 ×1
Brick Wedged, Curved 6 x 2 Left, Inner Ridges Black Part 41748 Element 4160130 ×4
Brick Wedged, Curved 6 x 2 Right, Inner Ridges Black Part 41747 Element 4160108 ×4
Brick Wedged, Curved Inverted 6 x 2 Left Light Bluish Gray Part 41765 Element 4260934 ×5
Brick Wedged, Curved Inverted 6 x 2 Right Light Bluish Gray Part 41764 Element 4260935 ×5

Bricks 19 pieces

Brick 1 x 2 Black Part 3004 Element 300426 ×11
Brick 1 x 1 Dark Bluish Gray Part 3005 Element 4211098 ×8

Bricks Curved 16 pieces

Brick Curved 3 x 1 No Studs Black Part 50950 Element 4251161 ×10
Brick Curved 6 x 1 Black Part 42022 Element 4160393 ×2
Brick Curved 6 x 2 Black Part 44126 Element 4180548 ×2
Brick Curved Inverted 6 x 1 Light Bluish Gray Part 42023 Element 6132260 or 4211731 ×2

Plates Wedged 14 pieces

Wedge Plate 3 x 2 Left Black Part 43723 Element 4180536 ×4
Wedge Plate 3 x 2 Right Black Part 43722 Element 4180508 ×4
Wedge Plate 3 x 3 Cut Corner Black Part 2450 Element 4227684 or 245026 ×2
Wedge Plate 4 x 2 Left Dark Bluish Gray Part 41770 Element 4210788 ×2
Wedge Plate 4 x 2 Right Dark Bluish Gray Part 41769 Element 4210782 ×2

Technic Gears 14 pieces

Technic Gear 36 Tooth Double Bevel Black Part 32498 Element 4255563 or 4177434 ×2
Technic Gear 12 Tooth Double Bevel Light Bluish Gray Part 32270 Element 32270194 or 4211634 ×4
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening] Light Bluish Gray Part 32269 Element 32269194 or 4211635 ×2
Technic Gear 24 Tooth [New Style with Single Axle Hole] Light Bluish Gray Part 3648b Element 4211565 ×4
Technic Gear 8 Tooth Light Bluish Gray Part 3647 Element 4211432 or 3647194 ×1
Technic Worm Gear Light Bluish Gray Part 4716 Element 4211510 ×1

Technic Special 14 pieces

Technic Brick Special 2 x 2 with Ball Socket and Axle Hole Dark Bluish Gray Part 57910 ×2
Technic Cam Dark Bluish Gray Part 6575 Element 6575199 or 4210759 ×4
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] Trans-Neon Green Part 41669 Element 4163577 ×2
Technic Tooth 1 x 3 with Axle Hole [Rounded Underside] White Part 41669 Element 4173941 ×6

Tiles 13 pieces

Tile 1 x 2 with Groove Black Part 3069b Element 306926 ×9
Tile 1 x 4 with Groove Black Part 2431 Element 243126 ×4

Animal / Creature Body Parts 9 pieces

Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section Glow In Dark Trans Part 40379 Element 4508461 or 4297137 ×9

Technic Bushes 7 pieces

Technic Bush Red Part 3713 Element 6271820 or 4227155 1 spare in the box ×5
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced Yellow Part 32123b Element 6271167 or 3212324 1 spare in the box ×2

Electronics 6 pieces

Battery Box, Power Functions 4 x 11 x 7 with Orange Switch and Dark Bluish Gray Covers [Complete Assembly] Light Bluish Gray Part 58119 Element 4506078 ×1
Control Unit, IR, Power Functions, with Dark Bluish Gray Bottom Light Bluish Gray Part 58122 Element 6225576 or 6074396 ×1
Motor, Medium, Power Functions, 3 x 6 x 3 with Dark Bluish Gray Bottom and 20cm Wire Light Bluish Gray Part 58120 Element 6209881 or 6151440 ×1
Motor, XL, Power Functions, 6 x 5 x 6, 20cm with Dark Bluish Gray Bottom Light Bluish Gray Part 58121 Element 6102930 or 6073386 ×1
Receiver Unit, IR, Power Functions Light Bluish Gray Part 58123a Element 6194861 or 6132634 ×1
Sound Brick 2 x 4 x 2 Light Bluish Gray Top with Dinosaur Roar Sound Light Bluish Gray Part 55206c02 Element 4510216 ×1

Wheels and Tyres 6 pieces

Technic Wedge Belt Wheel Tire Black Part 2815 Element 6028041 or 281526 ×2
Wheel 30.4 x 14 Solid Smooth Black Part 32146 Element 4288814 or 4120425 ×2
Technic Wedge Belt Wheel [aka Pulley] Light Bluish Gray Part 4185 Element 6321743 or 4494222 ×2

Bricks Special 4 pieces

Brick Special 1 x 4 with 4 Studs on One Side Light Bluish Gray Part 30414 Element 4211636 ×4

Technic Beams Special 4 pieces

Technic Beam 1 x 2 with Ball Joint Angled Dark Bluish Gray Part 50923 Element 4503381 or 4289258 ×2
Technic Beam 3 x 0.5 Liftarm with Boss and Pin / Crank Light Bluish Gray Part 33299a Element 4211688 ×2

Bricks Round and Cones 1 piece

Brick Round 4 x 4 with 4 Side Pin Holes and Center Axle Hole Black Part 6222 Element 6533083 or 4290056 ×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

4958 Monster Dino

Before you call it missing

Your missing list