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 15.7% repair risk Easy

Ultimate Builders Set (3800-1) is a LEGO Mindstorms from 2001. The set contains 322 parts across 12 part and colour combinations in 7 colours — the full inventory below shows exactly which pieces you need to build or complete it.

Parts Inventory

🧱 322 parts

Part	Color	Qty	LEGO price each
String Cord Medium Thickness 200cm 14728c200	Black	1×	Check price → View
Technic Pin with Friction Ridges Lengthwise and Center Slots 2780	Black	20×	Check price → View
Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top 2793c01	Trans-Clear	1×	Check price → View
Plate Special 2 x 2 with 2 Pin Holes 2817	Light Gray	4×	Check price → View
Technic Beam 1 x 4 Thin with Stud Connector 2825	Light Gray	2×	Check price → View
Technic Turntable Large Type 1 Top, 56 Tooth 2855	Trans-Clear	1×	Check price → View
Technic Turntable Large Type 1 Base, 56 Tooth 2856	Black	1×	Check price → View
Technic Beam Triangle Thin [Type I] 2905	Black	2×	Check price → View
Technic Pin 3/4 32002	Dark Gray	4×	Check price → View
Technic Tread Hub 32007	White	2×	Check price → View
Technic Reel 3 x 2 32012	Yellow	1×	Check price → View
Plate Special 1 x 2 with Door Rail 32028	Light Gray	4×	Check price → View

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Repairability

Can you fix Ultimate Builders Set if a piece goes missing?

15.7%High repair risk

easy to fixguard this box

11 of the 70 part+color combinations in this set appear in 3 or fewer sets ever made. Lose one of those and a replacement is very hard to find.

Theme average

8.4%

All sets

6.7%

Hardest to replace

String Cord Medium Thickness 200cm · Black · only this setPneumatic Cylinder · Trans-Clear · only this setTechnic Turntable Large Type 1 Top, 56 T… · Trans-Clear · only this set

How we calculate this →