# LEGO 7691-1 — ETX Alien Mothership Assault (2007)

Source: https://www.brickmissing.com/sets/7691-1-etx-alien-mothership-assault
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

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.

## Set facts

- Set number: 7691-1
- Name: ETX Alien Mothership Assault
- Theme: Space › Mars Mission
- Released: 2007
- Pieces: 434
- Distinct part + colour lots: 143
- Build difficulty: intermediate
- Repairability: 4.9% of this set's lots are hard to replace (7 of 143 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (143 lots, 434 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 1 | Aero Tube 32 x 3 x 2 1/3 | Trans-Orange | 23221 | 4505360 | — |
| 2 | Equipment Goblet / Glass | Black | 2343 | 4106973 | — |
| 2 | Tile Special 1 x 2 Grille with Bottom Groove | Orange | 2412b | 4125254 | €0,06 |
| 5 | Tile Special 1 x 2 Grille with Bottom Groove | Dark Bluish Gray | 2412b | 4210631 | €0,06 |
| 1 | Tile 1 x 4 with Groove | Black | 2431 | 243126 | €0,12 |
| 2 | Tile 1 x 4 with Groove | Dark Bluish Gray | 2431 | 4211053 | €0,12 |
| 1 | Tile Special 1 x 2 with Handle | White | 2432 | 243201 | €0,11 |
| 2 | Tile Special 1 x 2 with Handle | Black | 2432 | 243226 | €0,11 |
| 1 | Brick 2 x 6 | Black | 2456 | 4181144 | €0,29 |
| 1 | Brick Special 1 x 2 with Pin | Dark Bluish Gray | 2458 | 4211087 | — |
| 2 | Brick Special 1 x 2 with Pin | Light Bluish Gray | 2458 | 4211364 | — |
| 3 | Plate Special 1 x 2 Side Handle [Free Ends] | Black | 2540 | 4140588 | €0,07 |
| 2 | Tile Special 1 x 1 with Clip and Straight Tips | Black | 2555 | 255526 | — |
| 2 | Brick Special 1 x 4 with Groove | Light Bluish Gray | 2653 | 4211613 | €0,19 |
| 9 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 2 | Lever Small Base with Black Lever | Black | 298c02 | 4118620 | — |
| 1 | Brick 2 x 4 | Black | 3001 | 300126 | €0,22 |
| 1 | Brick 2 x 3 | White | 3002 | 300201 | €0,17 |
| 2 | Handlebars | Black | 30031 | 3003126 | €0,10 |
| 1 | Brick 1 x 2 | White | 3004 | 300401 | €0,11 |
| 4 | Brick 1 x 1 | Light Bluish Gray | 3005 | 4211389 | €0,07 |
| 2 | Brick 1 x 6 | Light Bluish Gray | 3009 | 4211393 | €0,25 |
| 3 | Brick 1 x 4 | White | 3010 | 301001 | €0,16 |
| 2 | Brick 1 x 4 | Black | 3010 | 301026 | €0,16 |
| 2 | Brick Round 2 x 2 x 1 2/3 Dome Top, Blocked Open Stud | Trans-Clear | 30151a | 4113949 | — |
| 6 | Rock 1 x 1 Jewel / Gem 24 Facet | Trans-Neon Green | 30153 | 4114505 | — |
| 8 | Plate 2 x 4 | Dark Bluish Gray | 3020 | 4211065 | €0,15 |
| 3 | Plate 2 x 4 | White | 3020 | 302001 | €0,15 |
| 6 | Plate 2 x 3 | Dark Bluish Gray | 3021 | 4211043 | €0,13 |
| 10 | Plate 2 x 2 | Light Bluish Gray | 3022 | 4211397 | €0,10 |
| 1 | Plate 1 x 2 | Red | 3023 | 302321 | €0,08 |
| 4 | Plate 4 x 4 | Dark Bluish Gray | 3031 | 4243831 | €0,21 |
| 5 | Plate 4 x 4 | White | 3031 | 4243812 | €0,21 |
| 2 | Plate 2 x 8 | Light Bluish Gray | 3034 | 4211406 | €0,29 |
| 6 | Plate 2 x 8 | Black | 3034 | 303426 | €0,29 |
| 1 | Plate 4 x 8 | Dark Bluish Gray | 3035 | 4211061 | €0,46 |
| 2 | Brick Round 2 x 2 x 2 Robot Body, Axle Holder 'X' Orientation | White | 30361b | — | — |
| 2 | Hinge Brick 1 x 2 Locking with 1 Finger Vertical End | Dark Bluish Gray | 30364 | 4210723 | — |
| 2 | Hinge Brick 1 x 2 Locking with 2 Fingers Vertical End, 9 Teeth | Black | 30365 | 4129975 | — |
| 2 | Bar 4L (Lightsaber Blade / Wand) | Light Bluish Gray | 30374 | 6116608 | €0,05 |
| 3 | Slope 45? 2 x 2 | Black | 3039 | 303926 | €0,11 |
| 1 | Slope 45° 2 x 2 with Radar Screen Print | White | 3039pr0005 | 4261941 | — |
| 4 | Slope 45° 2 x 1 with Bottom Pin | White | 3040b | 4121932 | €0,10 |
| 4 | Hinge Brick 1 x 2 Locking with 1 Finger Horizontal End | Red | 30541 | 4183012 | — |
| 2 | Hinge Cylinder 1 x 2 Locking with 2 Click Fingers and Axle Hole, 9 Teeth | Black | 30553 | 4143372 | — |
| 2 | Plate Round Corner 4 x 4 | Lime | 30565 | 4504705 | €0,18 |
| 1 | Launcher, Aero Tube Air Pump 16 x 14 x 13 [Complete Assembly] | White | 30584c01 | 4504246 | — |
| 2 | Aero Tube Joiner 3 x 4 x 3 | Trans-Clear | 30585b | 4506997 | — |
| 3 | Slope 2 x 2 No Studs, with 3 Side Pistons Raised Edges | Black | 30603 | 4163524 | — |
| 4 | Technic Brick 1 x 2 [2 Pin Holes] | Dark Bluish Gray | 32000 | 4210762 | €0,10 |
| 1 | Technic Brick 1 x 2 [2 Pin Holes] | White | 32000 | 3200001 | €0,10 |
| 2 | Technic Beam 1 x 11.5 Double Bent Thick | Dark Bluish Gray | 32009 | 6271155 | €0,39 |
| 1 | Technic Axle and Pin Connector Angled #1 | White | 32013 | 6332573 | €0,08 |
| 1 | Technic Axle and Pin Connector Angled #3 - 157.5? | Black | 32016 | 6261386 | €0,13 |
| 3 | Technic Brick 1 x 14 [13 Pin Holes] | White | 32018 | 4112515 | — |
| 4 | Technic Brick 1 x 14 [13 Pin Holes] | Black | 32018 | 4107558 | €0,56 |
| 2 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Red | 32054 | 4125198 | — |
| 2 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Light Bluish Gray | 32054 | 4211865 | — |
| 3 | Technic Axle 2 Notched | Red | 32062 | 4142865 | €0,07 |
| 6 | Technic Brick 1 x 2 with Axle Hole Type 2 [X Opening] | Light Bluish Gray | 32064b | — | — |
| 3 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Light Bluish Gray | 32123b | 6271165 | €0,04 |
| 2 | Technic Plate Rotor 3 Blade with Smooth Ends and 6 Studs (Propeller) | Light Bluish Gray | 32125 | 4211842 | — |
| 4 | Technic Pin Double with Axle Hole | Black | 32138 | 4119589 | — |
| 1 | Technic Beam 2 x 4 L-Shape Thick | Light Bluish Gray | 32140 | 6271831 | €0,15 |
| 2 | Technic Beam 1 x 5 Thick | Light Bluish Gray | 32316 | 4211651 | €0,19 |
| 1 | Technic Beam 1 x 7 Thick | Dark Bluish Gray | 32524 | 4495931 | €0,25 |
| 10 | Technic Pin Connector Plate 1 x 2 x 1 2/3 [Two Holes On Top] | Dark Bluish Gray | 32530 | 4210763 | €0,13 |
| 2 | Technic Brick 4 x 6 with 2 x 4 Opening | Black | 32531 | 6456527 | €1,57 |
| 2 | Slope Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes] | Light Bluish Gray | 3660 | 4211436 | — |
| 2 | Plate 1 x 6 | Dark Bluish Gray | 3666 | 4211056 | €0,17 |
| 2 | Slope 65° 2 x 2 x 2 with Bottom Tube | Dark Bluish Gray | 3678b | 4234534 | €0,22 |
| 2 | Turntable 2 x 2 Plate - Top | Light Bluish Gray | 3679 | 4540203 | €0,08 |
| 2 | Turntable 2 x 2 Plate, Base | Black | 3680 | 368026 | €0,11 |
| 4 | Technic Brick 1 x 2 [1 Pin Hole] | Light Bluish Gray | 3700 | 4211440 | €0,12 |
| 3 | Technic Brick 1 x 4 [3 Pin Holes] | Black | 3701 | 370126 | €0,17 |
| 1 | Technic Axle 4 | Black | 3705 | 370526 | €0,08 |
| 1 | Technic Axle 6 | Black | 3706 | 370626 | €0,12 |
| 1 | Plate 1 x 4 | White | 3710 | 371001 | €0,12 |
| 2 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 2 | Plate Special 1 x 2 with 1 Stud without Groove (Jumper) | Dark Gray | 3794a | 379427 | — |
| 4 | Plate 2 x 6 | Dark Bluish Gray | 3795 | 4211002 | €0,19 |
| 2 | Technic Brick 1 x 6 [5 Pin Holes] | Black | 3894 | 389426 | €0,29 |
| 2 | Hinge Brick 1 x 2 Base | Light Bluish Gray | 3937 | 4211469 | €0,10 |
| 2 | Brick Round 2 x 2 with Axle Hole | White | 3941 | 614301 | €0,11 |
| 2 | Brick Round 2 x 2 with Axle Hole | Trans-Neon Green | 3941 | 611649 | — |
| 8 | Antenna 1 x 4 with Rounded Top | Tan | 3957a | 395705 | — |
| 1 | Plate 6 x 6 | Dark Bluish Gray | 3958 | 4211134 | €0,53 |
| 4 | Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening) | Dark Bluish Gray | 4032a | 4211042 | €0,06 |
| 1 | Large Figure Weapon Spear, Drill with Axle and Hole | Black | 40340 | 4144521 | — |
| 8 | Animal Body Part / Plant, Tail / Neck / Branch / Trunk, Middle Section with Pin, Round Pin Hole | Lime | 40378 | 4504566 | — |
| 6 | Animal Body Part / Plant, Tail / Claw / Horn / Branch / Tentacle, End Section | Lime | 40379 | 4295522 | — |
| 6 | Brick Special 1 x 1 with Headlight | Black | 4070 | 407026 | €0,07 |
| 2 | Seat / Chair 2 x 2 | Tan | 4079 | 6219785 | €0,19 |
| 2 | Plate Special 1 x 1 with Clip Light, Bar Hole [Thick Ring] | Black | 4081b | 6281993 | €0,10 |
| 10 | Tile Round 2 x 2 with Bottom Cross | Black | 4150 | 415026 | — |
| 2 | Wedge Plate 4 x 2 Right | Black | 41769 | 4160869 | €0,11 |
| 2 | Wedge Plate 4 x 2 Left | Black | 41770 | 4161332 | €0,11 |
| 2 | Plate Special 2 x 2 with Grills | Light Bluish Gray | 41862 | 4211748 | €0,25 |
| 1 | Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Black | 42003 | 6273708 | €0,12 |
| 2 | Brick Curved 6 x 1 | Black | 42022 | 4160393 | €0,30 |
| 1 | Wedge Curved 12 x 3 Right | White | 42060 | 4162779 | — |
| 1 | Wedge Curved 12 x 3 Left | White | 42061 | 4162781 | — |
| 3 | Technic Pin 1/2 | Light Bluish Gray | 4274 | 4211483 | €0,05 |
| 2 | Dish 6 x 6 Inverted, Radar / Webbed [Anti-studs at 90°] | Trans-Neon Green | 4285b | 4110049 | — |
| 7 | Technic Axle Pin with Friction Ridges Lengthwise | Black | 43093 | 4206482 | €0,06 |
| 8 | Wedge Plate 4 x 4 with 2 x 2 Cutout | Black | 43719 | 6275401 | €0,39 |
| 6 | Hinge Plate 1 x 2 Locking with 2 Fingers On End, with Groove, 9 Teeth | Black | 44302a | 4183060 | — |
| 6 | Hinge Plate 1 x 2 Locking with 1 Finger on Side, with Groove | Dark Bluish Gray | 44567a | 4210892 | — |
| 2 | Plate 1 x 10 | Dark Bluish Gray | 4477 | 4257526 | €0,16 |
| 1 | Hinge Tile 1 x 4 Locking Dual 1 Fingers on Top [4 Locking Ridges] | Black | 44822 | 4193108 | — |
| 4 | Plate Special 1 x 8 with Door Rail | Black | 4510 | 4286009 | €0,22 |
| 2 | Technic Axle 3 | Light Bluish Gray | 4519 | 4211815 | €0,05 |
| 1 | Technic Axle Connector Double Flexible [Rubber] | Black | 45590 | 4198367 | €0,17 |
| 2 | Cone 1 x 1 [No Top Groove] | Trans-Dark Blue | 4589 | 618843 | — |
| 8 | Cone 1 x 1 [No Top Groove] | Trans-Neon Green | 4589 | 458949 | — |
| 8 | Cone 1 x 1 [No Top Groove] | Trans-Red | 4589 | 618841 | — |
| 1 | Technic Worm Gear | Black | 4716 | 471626 | — |
| 1 | Panel 1 x 2 x 1 [Square Corners] | White | 4865a | 486501 | — |
| 2 | Wedge Curved 10 x 3 Left | Black | 50955 | 6344913 | €0,74 |
| 2 | Wedge Curved 10 x 3 Right | Black | 50956 | 6344914 | €0,68 |
| 2 | Animal Body Part, Barb / Claw / Tooth / Talon / Horn, Small | Red | 53451 | 6270107 | €0,07 |
| 1 | Projectile, Technic Competition Arrow, Liftarm Shaft with Hollow Black Rubber End | Light Bluish Gray | 57028c01 | 4299625 | — |
| 3 | Flexible Ribbed Hose 8mm Ends 19L | Orange | 57539 | 4505775 | — |
| 1 | Launcher, Technic Competition Cannon Flat Bottom [Complete Assembly] | Black | 57796 | 4499434 | — |
| 2 | Hinge Plate 1 x 12 Locking 7 Teeth with Angled Side Extensions and Tapered Ends | Lime | 57906 | 4506401 | — |
| 2 | Hinge Plate 1 x 12 Locking 7 Teeth with Angled Side Extensions and Tapered Ends | Black | 57906 | 6525158 | €0,59 |
| 4 | Projectile, Weapon Foam Dart with Black Tip | Black | 58842 | 4501928 | — |
| 6 | Brick Round Corner 10 x 10 with Slope 33° Edge, Axle Hole, Facet Cutout | Black | 58846 | 6454174 | €1,39 |
| 1 | Launcher, Weapon, Four Barrel Foam Dart Launcher | Orange | 59492 | 4505526 | — |
| 1 | Sticker Sheet for Set 7691-1 | Unknown | 59623 | 4506056 | — |
| 2 | Hinge Brick 2 x 2 Top Plate Thin | Black | 6134 | 4124096 | €0,15 |
| 4 | Plate Round 1 x 1 with Solid Stud | Trans-Dark Blue | 6141 | 6514055 | €0,05 |
| 4 | Plate Round 1 x 1 with Solid Stud | Trans-Neon Green | 6141 | 3005749 | — |
| 1 | Brick Arch 1 x 4 x 2 | White | 6182 | 6031098 | €0,28 |
| 1 | Bar 1 x 4 x 2 | Black | 6187 | 4141349 | €0,22 |
| 1 | Technic Axle Connector Ridged [with x Hole x Orientation] | Lime | 6538b | 4154499 | — |
| 1 | Technic Axle 1.5 with Perpendicular Axle Connector (Technic Pole Reverser Handle) | Black | 6553 | 4107765 | €0,19 |
| 7 | Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots | Black | 6558 | 655826 | — |
| 3 | Technic Axle 3 with Stud | Dark Bluish Gray | 6587 | 4211086 | — |
| 2 | Tile 1 x 6 with Groove | Dark Bluish Gray | 6636 | 4210651 | €0,13 |
| 4 | Hinge Plate 1 x 4 Swivel Top / Base - Solid Clip [Complete Assembly] | Light Bluish Gray | 73983 | 4219256 | — |
| 4 | Technic Pin Connector Round [No Slot] | Black | 75535 | 75619 | — |
| 4 | Technic Rubber Belt 24mm | Light Bluish Gray | 85544 | 6564266 | €4,55 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/7691-1-etx-alien-mothership-assault
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/7691-1-etx-alien-mothership-assault