BMW Factory Tool Set-Oil Filter Cap Wrench & Pressure Tester (E30/E36) - I tried ordering just the cap wrench (# 83300495448) years ago and accidently ended up buying a set which included a metal oil filter housing cover with a threaded nipple on the top for a pressure gauge attachment. I cannot find an exact crossover to a later part number. Old manuals may refer to this as tools # 117330 and # 117331. For M42/M44 engines. Possibly others. The cap socket is universal for BMW spin on filters and housing covers that with 14 flutes and 74mm diameter. This cap wrench works with the pressure tester as it has a recess for the threaded nipple on the tester.
Tool is NEW - never used. (Note- last picture is of the standard black plastic filter housing cover that this tool replaces when testing pressures)