The Motor and Battery Swap stamp is one of those Forza Horizon 6 tasks that sounds easy, then quietly wastes ten minutes if you pick the wrong car. You don't need to throw loads of FH6 Credits at random EV upgrades, either. The game wants one very specific conversion option, not just a better tyre compound, weight reduction, or a quick power bump from the usual performance menu.

What This Stamp Actually Wants

This challenge sits in the Discover Japan stamp book under car upgrades. The aim is simple: take a supported electric vehicle and install a proper Motor and Battery Swap from the conversions menu. That's the bit many players miss. If you only tune the car, change parts, or install normal upgrades, the stamp may not pop. It has to be the named swap option, bought and fitted through the garage system.

Quick Menu Route

• Get into a compatible electric vehicle first.
• Go to your Home or Garage menu.
• Open Cars, then choose Upgrades and Tuning.
• Enter Custom Upgrade.
• Go into Body Kits and Conversions.
• Select Motor and Battery Swap.
• Buy one available swap and install it.
• Leave the garage and return to free roam.

Cars That Make It Easy

Not every EV in the garage supports this conversion, which is why the challenge can feel bugged when it really isn't. If you want the cleanest route, use a car that's already known to show the Motor and Battery Swap option. The BMW iX xDrive50, Wuling Hongguang Mini EV, and Honda e are good picks. If you own one, use it. If not, buy the cheapest one that fits your budget and keep the spend sensible.

Picking the Swap Without Overspending

Once you're in the Motor and Battery Swap screen, you'll usually see more than one option. One may be modest and fairly affordable. Another might turn the little EV into something much quicker, but it'll cost far more. For the stamp, the game doesn't care which one you choose. If your only goal is Discover Japan progress, buy the cheaper swap, confirm the install, and don't sit in the menus expecting the reward right away.

Getting the Completion Pop

After the swap is installed, back out of the upgrade menus and drive back into the open world. That step matters. The notification normally appears once the game reloads you into free roam. If nothing shows, check two things before panicking: you used a supported EV, and you bought the actual Motor and Battery Swap rather than a standard performance part. In most cases, one of those is the issue.

Final Thoughts

This is a small stamp, but it's worth doing because it teaches you where Forza Horizon 6 hides some of its more interesting EV conversion tools. Use a supported car, take the cheaper route if you're saving for bigger buys, and keep cheap FH6 Credits in mind if you're planning several builds at once. Once the swap is fitted and you're back on the road, the Discover Japan points should be yours.