Check Engine Keychain

A classic “Check Engine” warning light icon turned into a 3D printable keychain or hanging tag.Perfect as:a funny gift for mechanics and car loversa keyring accessory for any drivera little wall or rearview mirror decorationa sarcastic reminder that your car might not be okay Designed for dual-color printing – the body of the icon is dark (like black or gray), and the engine outline pops in a bright color (like warning-light yellow). This model is provided as a .3mf file with two separate bodies (base + outline), ready for:Automatic filament switching (e.g. ACE Pro, AMS, MMU)Or manual pause-based switching – just insert a Pause at Layer command before the outline begins Tested Print Settings:Material: PETG (The Filament)Nozzle: 0.4 mmLayer height: 0.16 mmInfill: 40%Top Surface Pattern: Hilbert Curve (because I like it)Supports: Not requiredBrim: OptionalFilament swap: Pause before color layer (15)