How many pieces does the LEGO Ultimate Builders Set (3800-1) have?

The LEGO Ultimate Builders Set set (3800-1) contains 322 pieces. It was released in 2001 as part of the LEGO Mindstorms theme.

How can I find missing parts for LEGO set 3800-1?

On BrickMissing you can check which parts from the LEGO Ultimate Builders Set (3800-1) you already own. Add your LEGO collection and we'll show exactly which of the 322 pieces you're missing and which you already have.

Can I build the LEGO Ultimate Builders Set with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 322 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Ultimate Builders Set from?

The LEGO Ultimate Builders Set (3800-1) belongs to the LEGO Mindstorms theme. You can browse all Mindstorms sets on BrickMissing to find more sets from this theme.

Ultimate Builders Set

🏷️ 3800-1•🎨 Mindstorms•📅 2001•🧱 322 parts•Easy

Ultimate Builders Set (3800-1) is a LEGO Mindstorms from 2001. This page uses the available set and theme data until a fuller product description is available.

Parts Inventory

🧱 322 parts

Part	Color	Qty
String Cord Medium Thickness 200cm 14728c200	Black	1×
Technic Pin with Friction Ridges Lengthwise and Center Slots 2780	Black	20×
Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top 2793c01	Trans-Clear	1×
Plate Special 2 x 2 with 2 Pin Holes 2817	Light Gray	4×
Technic Beam 1 x 4 Thin with Stud Connector 2825	Light Gray	2×
Technic Turntable Large Type 1 Top, 56 Tooth 2855	Trans-Clear	1×
Technic Turntable Large Type 1 Base, 56 Tooth 2856	Black	1×
Technic Beam Triangle Thin [Type I] 2905	Black	2×
Technic Pin 3/4 32002	Dark Gray	4×
Technic Tread Hub 32007	White	2×

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Technic Turntable Large Type 1 Top, 56 Tooth	2855	Trans-Clear	1×
Technic Turntable Large Type 1 Base, 56 Tooth	2856	Black	1×
Technic Beam Triangle Thin [Type I]	2905	Black	2×
Technic Pin 3/4	32002	Dark Gray	4×
Technic Tread Hub	32007	White	2×
Technic Reel 3 x 2	32012	Yellow	1×
Plate Special 1 x 2 with Door Rail	32028	Light Gray	4×
Technic Axle Connector with Axle Hole	32039	Light Gray	4×
Technic Axle Connector with Axle Hole	32039	Black	4×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Black	24×
Technic Axle 2 Notched	32062	Black	5×
Technic Axle 5	32073	Black	4×
Technic Bush 1/2 Smooth with Axle Hole Reduced	32123a	Tan	5×
Technic Beam 2 x 4 L-Shape Thick	32140	Black	4×
Large Figure Throwing Disk, MindStorms Print	32171pr0062	Black	6×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Black	4×
Technic Axle and Pin Connector Angled #4 - 135°	32192	Black	2×
Technic Gear 20 Tooth Bevel	32198	Light Gray	1×
Technic Axle 5.5 with Stop [Flat Short End]	32209	White	2×
Technic Beam 3 x 5 L-Shape with Quarter Ellipse Thin	32250	Black	4×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 2 [X Opening]	32269	Light Gray	3×
Technic Gear 12 Tooth Double Bevel	32270	Light Gray	3×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Trans-Neon Orange	2×
Technic Beam 1 x 9 Bent (7 - 3) Thick	32271	Trans-Neon Green	2×
Technic Beam 1 x 15 Thick	32278	Black	6×
Technic Beam 1 x 15 Thick	32278	Black	5×
Technic Axle and Pin Connector Perpendicular Double	32291	Black	4×
Technic Beam 1 x 5 Thick	32316	Black	8×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Black	2×
Technic Beam 1 x 4 Thin	32449	Black	4×
Technic Beam 1 x 4 Thin	32449	Black	4×
Technic Beam 1 x 3 Thick	32523	Black	6×
Technic Beam 1 x 7 Thick	32524	Black	4×
Technic Beam 3 x 5 L-Shape Thick	32526	Yellow	2×
Technic Beam 3 x 5 L-Shape Thick	32526	Black	2×
Technic Pin Connector Plate with One Hole (Single on Bottom)	32529	Black	2×
Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top]	32530	Black	6×
Technic Brick 4 x 6 with 2 x 4 Opening	32531	Trans-Clear	2×
Technic Brick 6 x 8 with 4 x 6 Opening	32532	Trans-Clear	2×
Tyre 15 x 6 Offset Tread Small	3641	Black	4×
Technic Brick 1 x 8 [7 Pin Holes]	3702	Black	4×
Technic Axle 10	3737	Black	1×
Technic Gear Rack 1 x 4	3743	Light Gray	4×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Light Gray	6×
Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)	4032a	White	2×
CD-Rom, Ultimate Builders Set (Set 3800)	4153273	Unknown	1×
Technic Axle 3	4519	Black	5×
Hose, Pneumatic 4mm D. 195L	5102c195	Trans-Clear	1×
Wire with Brick 2 x 2 x 2/3 Pair, 69L	5306bc069	Black	1×
Arm Piece with Pin, 2 Fingers	6048a	Black	4×
Plate Round 1 x 1 with Solid Stud	6141	Light Gray	36×
Technic Axle and Pin Connector Perpendicular	6536	Black	6×
Technic Axle Connector Ridged [with x Hole x Orientation]	6538b	Black	2×
Technic Brick 1 x 1 with Pin Hole	6541	Black	14×
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6558	Black	26×
Technic Axle 3 with Stud	6587	Dark Gray	4×
Technic Gearbox 2 x 4 x 3 1/3	6588	Trans-Clear	1×
Technic Beam 1 x 3 Thin	6632	Light Gray	2×
Technic Beam 1 x 3 Thin	6632	Black	2×
Technic Beam 1 x 3 Thin	6632	Black	4×
Motor, 9V Mini [Old Style]	71427c01	Light Gray	1×
Rubber Band Small 13mm (Square Cross Section)	71509	Black	4×
Pneumatic Pump 1 x 5.5	74982	Yellow	1×
Pneumatic Switch with Top Studs	75215	Light Gray	1×
Technic Pin Connector Round [No Slot]	75535	Black	4×

Build DNA

Parts inventory insights for Ultimate Builders Set

322 pieces puts this build -32% against the average Mindstorms set and +48% against the average 2001 release.

LEGOMINDSTORMS

Vs average Mindstorms set

-32%-151 parts

This set322

Average set473

Average Mindstorms set: 473 pieces across 33 other sets.

Vs average 2001 set

+48%+105 parts

This set322

Average set217

Average 2001 set: 217 pieces across 145 other sets.

Color profile

10different colors

Dominant color

Black

Black215x

67%

Light Gray71x

22%

Trans-Clear8x

Dark Gray8x

Unique parts

5 pieces per unique type

Repeat factor

Average pieces per unique type.

Most used part

Plate Round 1 x 1 with Solid Stud

36x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩64unique parts🎨10different colors📊32.2avg. parts per color🏆36×Plate Round 1 x 1 with Solid Stud

🎨 All Mindstorms sets 📅 All sets from 2001

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