How many pieces does the LEGO ETX Alien Mothership Assault (7691-1) have?

The LEGO ETX Alien Mothership Assault set (7691-1) contains 434 pieces. It was released in 2007 as part of the LEGO Space theme.

How can I find missing parts for LEGO set 7691-1?

On BrickMissing you can check which parts from the LEGO ETX Alien Mothership Assault (7691-1) you already own. Add your LEGO collection and we'll show exactly which of the 434 pieces you're missing and which you already have.

Can I build the LEGO ETX Alien Mothership Assault 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 434 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO ETX Alien Mothership Assault from?

The LEGO ETX Alien Mothership Assault (7691-1) belongs to the LEGO Space theme. You can browse all Space sets on BrickMissing to find more sets from this theme.

ETX Alien Mothership Assault

7691-1 Space 2007 434 parts 4.9% repair risk Intermediate

The LEGO Mars Mission ETX Alien Mothership Assault (7691-1) details the fierce struggle for energy crystals on Mars. The massive ETX Alien Mothership, a versatile 4-in-1 strike ship, features weaponry including a firing missile launcher and deploys three attack vehicles for its objective. Countering this alien threat is the Mars Mission defense station, equipped with an air pump system that launches four foam missiles. The set includes two astronaut minifigures and five glow-in-the-dark alien minifigures, creating a dynamic confrontation. Astronauts operate the defense station's drill, moving it back and forth to unearth more energy crystals amidst the invasion.

Parts Inventory

🧱 434 parts

Part	Color	Qty	LEGO price each
Aero Tube 32 x 3 x 2 1/3 23221	Trans-Orange	1×	Check price → View
Equipment Goblet / Glass 2343	Black	2×	Check price → View
Tile Special 1 x 2 Grille with Bottom Groove 2412b	Orange	2×	€0,06 View at LEGO → View
Tile Special 1 x 2 Grille with Bottom Groove 2412b	Dark Bluish Gray	5×	€0,06 View at LEGO → View
Tile 1 x 4 with Groove 2431	Black	1×	€0,12 View at LEGO → View
Tile 1 x 4 with Groove 2431	Dark Bluish Gray	2×	€0,12 View at LEGO → View
Tile Special 1 x 2 with Handle 2432	White	1×	€0,11 View at LEGO → View
Tile Special 1 x 2 with Handle 2432	Black	2×	€0,11 View at LEGO → View
Brick 2 x 6 2456	Black	1×	€0,29 View at LEGO → View
Brick Special 1 x 2 with Pin 2458	Dark Bluish Gray	1×	Check price → View
Brick Special 1 x 2 with Pin 2458	Light Bluish Gray	2×	Check price → View
Plate Special 1 x 2 Side Handle [Free Ends] 2540	Black	3×	€0,07 View at LEGO → View

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Repairability

Can you fix ETX Alien Mothership Assault if a piece goes missing?

4.9%Moderate repair risk

easy to fixguard this box

7 of the 143 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

4.1%

All sets

6.7%

Hardest to replace

Brick Round 2 x 2 x 2 Robot Body, Axle H… · White · only this setSticker Sheet for Set 7691-1 · Unknown · only this setAero Tube 32 x 3 x 2 1/3 · Trans-Orange · 2 sets ever

How we calculate this →