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% catalog rarity Easy

Ultimate Builders Set (3800-1) is a LEGO set with a listed count of 322 parts. Available inventory data is shown below.

Parts Inventory

🧱 322 parts

Showing the first 12 rows of the parts list (322 pieces in total). The full list loads automatically.

Color	Qty	LEGO price each
Black	1×	Check price → View
Black	20×	Check price → View
Trans-Clear	1×	Check price → View
Light Gray	4×	Check price → View
Light Gray	2×	Check price → View
Trans-Clear	1×	Check price → View
Black	1×	Check price → View
Blue	2×	Check price → View
Dark Gray	4×	Check price → View
White	2×	Check price → View
Yellow	1×	Check price → View
Light Gray	4×	Check price → View

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Catalog rarity

How common are the parts in Ultimate Builders Set?

15.7%High rarity

more commonless common

11 of 70 recorded part+color combinations appear in 3 or fewer sets in our catalog. This does not measure replacement availability or price.

Theme average

8.4%

All sets

6.7%

Least common in our catalog

String Cord Medium Thickness 200cm · Black · only this set in our catalogPneumatic Cylinder · Trans-Clear · only this set in our catalogTechnic Turntable Large Type 1 Top, 56 T… · Trans-Clear · only this set in our catalog

How we calculate this →