Mechanical mounts

Mechanical mounts in World of Warcraft are numerous and distinct.

Drops

 * Mimiron's Head drops from Yogg-Saron in the 25-man version of Ulduar on hard mode.
 * Kor'kron Juggernaut is a rare drop from Garrosh Hellscream in Siege of Orgrimmar on Mythic difficulty.
 * Felsteel Annihilator drops from Archimonde in Mythic.
 * G.M.O.D. drops from High Tinker Mekkatorque in Battle of Dazar'alor.
 * Aerial Unit R-21/X drops from King Mechagon in Operation: Mechagon.
 * Mechagon Peacekeeper drops from HK-8 Aerial Oppression Unit in Operation: Mechagon.
 * Rusty Mechanocrawler drops from Arachnoid Harvester in Mechagon Island.
 * Rusted Keys to the Junkheap Drifter drops from Rustfeather in Mechagon Island.

Vendor

 * Darkmoon Dirigible is sold during the Darkmoon Faire by Lhara on Darkmoon Island for.
 * Goblin Trike Key and Goblin Turbo-Trike Key can be purchased from, in the Goblin Slums of Orgrimmar so long as your character has riding skill of 75/150 and you either are a goblin or have reputation with the Bilgewater Cartel.
 * Lightforged Warframe (item) is sold by Vindicator Jaelaana on the Vindicaar.
 * Vicious War Trike is sold by Deathguard Netharian in Orgrimmar.
 * Rustbolt Resistor is sold by Stolen Royal Vendorbot for when  with Rustbolt Resistance.

Achievement

 * Chauffeured Chopper is rewarded from Heirloom Hoarder.
 * Mechanized Lumber Extractor reward for completing the achievement Remember to Share.
 * Keys to the Model W for completing the achievement Mecha-Done in Mechagon.
 * Wonderwing 2.0 for completing the achievement Battle for Azeroth Pathfinder, Part Two.

Quest

 * Scrapforged Mechaspider quest line in Mechagon Island.

Engineering

 * Flying Machine &mdash; the schematic is taught by the trainers.
 * Turbo-Charged Flying Machine &mdash; the schematic is taught by the trainers.
 * Mekgineer's Chopper &mdash; the schematic can be learned from Schematic: Mekgineer's Chopper which requires the player to be with the Alliance Vanguard.
 * Mechano-Hog &mdash; the schematic can be learned from Schematic: Mechano-Hog which requires the player to be with the Horde Expedition.
 * Sky Golem &mdash; the schematic can be learned from Schematic: Chief Engineer Jard's Journal which drops from any mob in Pandaria, as long as the player knows engineering.
 * Mecha-Mogul Mk2 &mdash; the schematic can be learned from Schematic: Mecha-Mogul Mk2 which drops from Mogul Razdunk in the MOTHERLODE!!.

Other

 * Mechanocat Laser Pointer for X-995 Mechanocat is crafted from Junkyard Tinkering in Mechagon Island.
 * This mount is available in nine colors, with eight colors needing to be unlocked. The color is changed by Marvelous Martini.
 * Xiwyllag ATV is made from parts crafted from both engineers and blacksmiths.
 * This mount is available in four colors, with three colors needing to be unlocked. The color is changed by Kram Kelada.

Promotion

 * Two mounts were part of a promotion for Azeroth Choppers, a webseries competition. The Warlord's Deathwheel was the winner, granted to players who logged in during August and September 2014. Champion's Treadblade remains in the game, sold by Paulie in Stormwind City for.
 * Presumably also available to attendees of BlizzCon 2017, purchasing the BlizzCon 2017 Virtual Ticket (beginning on Sep. 13, 2017) also rewarded the Stormwind Skychaser and Orgrimmar Interceptor, character-sized, flying passenger gunships mounts, for World of Warcraft.
 * Meat Wagon (item) is a reward for purchasing the Warcraft III: Reforged Spoils of War Edition.
 * Keys to the Explorer's Jungle Hopper is a reward for Recruit-A-Friend.

Shop

 * Steamscale Incinerator mount available for purchase from the shop or the In-Game Store.

Not yet available
The following mechanical mounts never made it out of the Battle for Azeroth patch 8.2.0 PTR:
 * Keys to the Silver Mono-Wheel