BMW S50B30 Euro oil pump upgrade

Ever have an oil pump sprocket retaining nut back off and lose oil pressure? How about shearing off the oil pump shaft with the sprocket and nut still attached? Chances are you lost that engine. We hear this all the time and it happens to unsuspecting BMW enthusiast more than you might think. This kit is very popular for a reason; it eliminates all failure modes permanently while retaining serviceability. Some people believe it is enough to weld the OEM bolt on, or use a special nut and/or safety wire, however in these cases this does not solve the shearing of the shaft (completely off!) and in some cases can make things worse.