Modder Cracks Open Forza Horizon 6's Car Interiors

One car. That's where it starts. Modder Smidgeee has released Customizable Interior, a mod for Forza Horizon 6 that lets you swap out seats, steering wheels, and interior colour schemes on the 2014 BMW M4 Coupé, filling a gap that Playground Games left wide open at launch.

Forza Horizon 6 shipped with 550 cars and a Japan-spanning open world, but its customisation suite stops at the cabin door. You can bolt on bodykits, tune your suspension, and paint your exterior any shade you want, but the interior? Untouchable. It's a strange omission for a game that otherwise drowns you in options, and it's one that competitors have already noticed. Clutch, the newly-announced open-world racer from former Forza Horizon 5 creative director Mike Brown's studio Maverick Games, made a point of showing off interior customisation in its reveal, right down to letting you scatter junk across your dashboard.

Smidgeee's mod works by hooking into existing upgrade tiers for the M4. According to the mod's description, selecting the third stage of interior upgrade, which normally just installs a rollcage, now swaps the M4's stock seats for those from the Toyota GR GT, Horizon 6's cover car. Higher weight reduction tiers replace the steering wheel with Sparco and OMP racing units. On the cosmetic side, you can toggle between leather and alcantara, then independently colour the seats, dash, and door inserts. It's not a full cabin overhaul, but it's a proof of concept that works, and the install is as simple as extracting a ZIP file.

More cars are coming

Smidgeee has said the M4 is intended to be the "first of many cars," and given that Horizon 6's garage runs into the hundreds, there's a lot of ground to cover. I think this is the kind of mod that could snowball quickly if the community picks it up. Interior modding in racing games has always had a dedicated following, and someone got it running this soon after launch suggests the game's file structure isn't fighting back too hard.

What makes this interesting beyond the mod itself is the timing. Playground Games built one of the best-received racing games in years, but left interior customisation entirely on the table. Now a solo modder is doing it for free, and a rival studio staffed by ex-Playground developers is using it as a selling point. If that doesn't nudge Playground toward adding official interior options in a future update, I'm not sure what would.

Smidgeee has a track record of car mods from Forza Horizon 5, so this isn't a first attempt from an unknown. For anyone who wants to try the mod, it's available now and limited to PC.