Cosmic Car Key

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Desktop/Console/Mobile-Only Content: This information applies only to the Desktop, Console, and Mobile versions of Terraria.
Cosmic Car Key
  • Cosmic Car Key item sprite
Stack digit 1.png
Use time20 (Very fast)
TooltipSummons a rideable UFO mount
RarityRarity level: 8
Sell5 GC
Research1 required
Grants Buff
BuffUFO MountUFO Mount(Desktop, Console and Mobile versions)
Buff tooltipIt's a good thing you had a MAC
Summons Mount
UFO Mount
UFO Mount
  • Internal Item ID: 2769 (Desktop, Console and Mobile versions)
  • Internal Mount ID: 7
  • Internal Buff ID: 141 (Desktop, Console and Mobile versions)
Obtained from Obtained from
Classic mode icon.png Classic
Expert mode icon.png Expert
Master mode icon.png Master
Martian Saucer(Desktop, Console and Mobile versions)Martian Saucer.gifMartian Saucer(Desktop, Console and Mobile versions)116.66%

The Cosmic Car Key is a Hardmode, post-Golem mount-summoning item. When used, it summons a rideable UFO Mount that allows the player to fly and hover indefinitely. The Cosmic Car Key has a 1/6 (16.67%) chance of being dropped by the Martian Saucer during the Martian Madness event.


  • The UFO mount does not work in liquids. When attempting to fly through them, the player will automatically be dismounted.
  • The mount has a top speed of 41 mph when flying up/down or east/west. When flying diagonally, however, it can reach 58 mph max.
    • Because of this, one can fly at the same speed as, if not faster, than the Dungeon Guardian (41 mph consistently).
  • When ascending the UFO, it can travel upwards through a one block gap while also moving east or west.
  • The UFO cannot fly downwards through "bottom" platforms (that is, hammered to the lower half of the block), and will instead bounce off them. Other platforms can be passed downward with only a slight delay.
  • Falling from maximum speed and mounting the UFO allows it to fly at 51 mph.
    • Similarly, it is possible to fall from a height at max speed and then mount the UFO and fly diagonally. This reaches a speed of 66 mph.


Achievement The Cavalry.png
The Cavalry • Equip a mount.
Equip your first mount. (Desktop, Console and Mobile versions)
Category: Collector Collector


  • When using this mount, it may be useful to replace other mobility accessories such as any wings or boots with damage or defense-based accessories.
  • While they lack infinite flight time (unless the Soaring Insignia(Desktop, Console and Mobile versions) is used), using wings with hovering abilities in tandem with Lightning/Frostspark/Terraspark Boots(Desktop, Console and Mobile versions) can provide more speed and mobility.
  • Using wings with a fast ascent speed such as Jetpack, it is possible to fly upwards with the wings, deploy the mount and maintain the speed of the wings beyond the duration of the wings.
  • Using the Rod of Discord can be a great way to travel while using this mount, as it allows the player to teleport through tight areas rather than dismounting the UFO.
  • It is possible to give this mount to another player while mounted and still keep using the UFO.
  • The mobility of this mount and the ability to use items while riding it make it a good mount for construction.
  • If one needs to have an infinite flight mount underwater, the Cute Fishron Mount or the Witch's Broom(Desktop, Console and Mobile versions) are good replacements for the UFO.
  • This mount may not be the best to use in an arena for intense boss fights (such as the Empress of Light(Desktop, Console and Mobile versions)and Moon Lord), as its infinite flight time is overshadowed by its rather slow speed, lack of dashing ability, and slow turning speed. It may be preferable to use the Cute Fishron with Honey and Water bubbles (which has a very fast speed along with boosting damage by 15% when in and shortly after leaving liquids) or to not use mounts at all and instead have the Soaring Insignia(Desktop, Console and Mobile versions), the Expert mode-exclusive drop from the Empress of Light, which provides infinite flight time.


  • The buff tooltip is a reference to the film Independence Day, in which a Macintosh computer is used against an alien spaceship.
  • The name of the item might be a reference to a line in a rant about the insanity of everyday life by Eric T. Duckman from season 3, episode 6 "A Room with a Bellevue" from the American adult animated sitcom Duckman. The line goes, "...knowing when it's time to flash the cosmic car key at those Pearly Gates, I won't be in the coffin anyway...".


  • Desktop
    • Increased drop rate.
    • Worms and teleporting enemies will no longer spawn if the player stays still in the UFO for 5 or more seconds.