If you have been trying to clear the Motor and Battery Swap stamp in Forza Horizon 6 and nothing seems to register, you are not alone. A lot of players assume any upgrade on an EV will do the trick, then end up wasting time in the garage. The game is fussier than it looks, and if you are low on FH6 Credits, you probably want to get it done with the least amount of trial and error.

What the Challenge Actually Wants

This stamp is tied to the Car Upgrades side of the Discover Japan book, and it is really about using the proper conversion menu rather than just bolting on random parts. That is the part that trips people up. You need a car that actually supports the swap, then you have to go through the Body Kits and Conversions path and install the Motor and Battery Swap from there. If you only buy a normal performance upgrade, the game will not treat it the same way, even if the car is electric already.

Picking a Car That Works

The easiest way to save yourself a headache is to start with a vehicle that definitely has the option available. The BMW iX xDrive50, the Wuling Hongguang Mini EV, and the Honda e are all good examples because they open the right menu without any extra fuss. If you already own one, great, you can jump straight in. If not, it is worth buying one before you start messing around with other EVs that may not support the swap at all. That is where a lot of people burn credits for nothing.

How to Make the Game Count It

Once you are in the right car, head into your garage or home menu, go to Cars, then Upgrades and Tuning, and open Custom Upgrade. From there, move into Body Kits and Conversions and look for Motor and Battery Swap. Pick one of the available options and confirm the install. The actual power level does not matter for the stamp, so you do not need to chase the expensive version unless you want it for driving feel. After the purchase, leave the garage and go back into free roam. That exit matters more than people expect.

Why It Sometimes Fails

If the challenge still does not pop, the issue is usually one of three things. Either the car was not compatible, the wrong upgrade path was used, or you stayed inside the menu instead of returning to the open world. It sounds simple, but that final step is easy to miss when you are moving fast. I have seen players install the swap, sit there waiting for a popup, and never get it because they never actually reloaded into the world. Give it a clean exit, then check the notification again.

Final Thoughts

Once you know the trick, this stamp is quick. It is one of those jobs that looks awkward on paper, then takes only a minute when you use the right EV and the right menu. The bigger win is that it pushes you into parts of the upgrade system that many players never touch, and that can help later when you want to tune cars properly instead of guessing. If you want to keep your garage moving without draining your balance, it helps to buy FH6 Credits only when you really need to, then spend them on upgrades that actually unlock progress.