There are two types of custom steering wheels. One that does not have any controls or airbags and another that has airbags and customisable buttons. The former is mostly only used by those who love vintage style. They won’t support any type of controls except for the horn. They are also not commendable due to safety reasons. In the case of the latter, all the controls of a stock steering wheel can be remapped to it. This type of steering wheel is vehicle specific. So, you have to ensure that the wheel is compatible with your car before the purchase.