They require a save editor or a hacked console.
Forza Motorsport 4 reached "End of Life" (EOL) status in , meaning all DLC was officially delisted and removed from the Xbox 360 Marketplace. Today, obtaining this content via USB is a primary method for preservationists and players looking to restore their garage. The State of FM4 DLC in 2026
If you have a friend with the DLC or a second console that still has it installed, you can use a USB drive to transfer it:
Do you still have your FM4 save file? Drop a comment below with the rarest car you’ve got in your garage. Let’s keep the ALMS and Top Gear spirit alive.