S52/M50/M52/M54 Oil Pump Tensioner Kit

BMW M5X / S5X Oil Pump Chain Tensioner Kit

The only true oil pump chain tensioner solution for BMW S52, M50, M52, M52TU, and M54 engines.

Oil pump failures are a well-known issue on BMW M5X and S5X engines, especially in high-RPM, track, and motorsport use. The common failure is usually blamed on engine harmonics, but the real problem often starts with excessive oil pump chain slack. At high RPM, the loose chain can whip back and forth, shocking the oil pump, sprocket, shaft, and nut. Over time, this can lead to spun oil pump nuts, damaged sprockets, chain wear, or even broken oil pump shafts.

BMW used oil pump chain tensioners in motorsport applications, but production engines were built without them. This kit adds the missing tensioner solution to help stabilize the oil pump chain and reduce the abuse placed on the oiling system.

While an upgraded oil pump shaft is a common solution, and one we also offer [HERE], the best approach is to address the root cause of the problem: uncontrolled chain movement. For a more complete oil pump reliability upgrade, this tensioner kit is the missing piece. If your chain is worn, we reccomend changing it while in there. The IWIS Master Link chains work well. 

The kit uses a proven polymer chain tensioner that rides against the oil pump chain to control slack and reduce chain whip at high RPM. The tensioner itself is an OEM-style component used in other vehicle applications and repurposed specifically for BMW M5X and S5X oil pump systems.

Installation requires drilling and tapping one mounting hole using the included template.

Full installation instructions can be found [HERE].

Fitment

• BMW M50
• BMW M52
• BMW M52TU
• BMW M54
• BMW S52

Kit Includes

• Oil pump chain tensioner
• Drill/tap template for mounting hole location
• Optional drill and tap kit

The items installed or applied to vehicles are intended strictly for off-road use only and track vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use under Environmental Regulatory Agency (ERA) laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free to contact us here with your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across the continental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.