Ever have an oil pump sprocket retaining nut back off and lose oil pressure? How about complete shearing of the oil pump shaft with the sprocket and nut still attached?
This can be ugly! This is a known issue with the weak oil pump drive shaft splines, and we hear (and see) all the time. It happens to the most unsuspecting BMW drivers more than you might think.

This kit is very popular for a reason; it eliminates all failure modes permanently while retaining 100% serviceability.
Some people believe it is enough to weld the OEM bolt on, or use a special nut and/or safety wire, however this does not solve the shearing of the shaft (completely off in some cases!) that is the common issue.
This oil pump issue effects both 100% stock and modified motors

This kit is the best solution on the planet addressing 100% of the issues. UPGRADE your oil pump with a VAC Oil Pump Upgrade Kit and safeguard yourself against silly yet extremely costly oil pump failures.

Replacing the oil pump is a simple job that can be completed by any competent mechanic when the oil pan is dropped.

VAC Oil Pump Upgrade Kit includes:

• New VAC design oil pump shaft
• Matching oil pump sprocket
• Grade 8 retaining hardware

VAC Tech Notes: -Kit install is relatively simple, but requires a hydraulic press and professional install is highly recommended.
-We can also offer our experienced machine shop staff to clean, check and install your new VAC kit into your pump for a $99 fee. You will receive your upgraded oil pump ready to bolt in in.