Upgraded the callipers + discs on my mk5 fiesta zetec-s with with fiesta ST150 items on the weekend. The parts are a straight swap, but when I went for a drive afterwards the abs + traction control lights came on for about 1/4 mile then went off again. Why would this happen? They work absolutely fine.
I didn't touch any sensors or connections, didn't have to use any force on anything, I was very careful.