Let's come back to the detailed question of whether the brakes from MY23, which are supposed to be better, can be converted to MY22 and earlier.
The question for me here is what components are actually installed.

Which brake fluid does MMC specify?
Which brake booster is used?
Which brake master cylinder is used?
Which brake caliper with how many pistons?
Which brake pads are used?
Which ABS is installed? Definitely a four-channel system, as you can see from the photo.

Unfortunately I don't have a picture of the brake disc and caliper.

Are the components on the PusFour and PlusSix the same?

Maybe one or the other member can answer one or the other question.

Once the questions for the different model years up to MY23 have been answered, the question of retrofitting can be answered.

[Linked Image]

Clemens

PlusFour Red Baron MY 2022