How many pieces does the LEGO Ultrarex (8504 + 8505 + 8506 + 8507) (C8504-1) have?

The LEGO Ultrarex (8504 + 8505 + 8506 + 8507) set (C8504-1) contains 88 pieces. It was released in 1999 as part of the LEGO Technic theme.

How can I find missing parts for LEGO set C8504-1?

On BrickMissing you can check which parts from the LEGO Ultrarex (8504 + 8505 + 8506 + 8507) (C8504-1) you already own. Add your LEGO collection and we'll show exactly which of the 88 pieces you're missing and which you already have.

Can I build the LEGO Ultrarex (8504 + 8505 + 8506 + 8507) 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 88 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Ultrarex (8504 + 8505 + 8506 + 8507) from?

The LEGO Ultrarex (8504 + 8505 + 8506 + 8507) (C8504-1) belongs to the LEGO Technic theme. You can browse all Technic sets on BrickMissing to find more sets from this theme.

Ultrarex (8504 + 8505 + 8506 + 8507)

C8504-1 Technic 1999 88 parts 35.3% catalog rarity Beginner

Ultrarex (8504 + 8505 + 8506 + 8507) (C8504-1) is a LEGO set with a listed count of 88 parts. Available inventory data is shown below.

Parts Inventory

🧱 88 parts

Showing the first 12 rows of the parts list (88 pieces in total). The full list loads automatically.

Color	Qty	LEGO price each
Black	6×	Check price → View
Black	6×	€0,07 View at LEGO → View
Black	1×	Check price → View
Tan	10×	Check price → View
Black	2×	Check price → View
Green	2×	Check price → View
Black	2×	Check price → View
Yellow	2×	Check price → View
Black	1×	Check price → View
Trans-Brown	1×	Check price → View
Yellow	1×	Check price → View
Purple	1×	Check price → View

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Catalog rarity

How common are the parts in Ultrarex (8504 + 8505 + 8506 + 8507)?

35.3%Very high rarity

more commonless common

12 of 34 recorded part+color combinations appear in 3 or fewer sets in our catalog. This does not measure replacement availability or price.

Theme average

6.5%

All sets

6.7%

Least common in our catalog

Large Figure Skeletal, Arm Forked · Yellow · 2 sets in our catalogLarge Figure Visor / Limb Cover, Armour… · Trans-Brown · 2 sets in our catalogLarge Figure Visor / Limb Cover, Armour · Yellow · 2 sets in our catalog

How we calculate this →