Knee Bolster - NSX (91-05) - OEMOEM Honda Acura NSX lower knee bolster cover. This leather cover that protects the steering columns wiring is underneath the steering column. Because of the high traffic nature of its location sometimes the clips or even the leather gets worn out. The leather can separate from the panel or the entire panel can hang unevenly Luckily a replacement can help your interior look brand new. With the lower knee bolster, there are 4 options to choose from;