BMW 1 3 E87 E90 E91 118i 120i 120i 320i N45 N46 1 Engine Oil Pump Balance Shaft

BMW 1 3 E87 E90 E91 118i 120i 120i 320i N45 N46 1 Engine Oil Pump Balance Shaft is an original component from the Oil pumps and parts group, designed for BMW N45 and N46 series petrol engines in E87, E90, and E91 models. This solution is dedicated to users who want to restore proper lubrication to the power unit while maintaining factory performance characteristics and high reliability of the oil system.

Specifications and technical data

• SKU: 7594471-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7594471
• Substitutable numbers: 11277594471, 7594471, 11277507646, 7507646, 11417559948, 7559948, 11277536191, 7536191, EM
• Offset (ET):
• Category: Oil Pumps & Parts

Purpose and function in the lubrication system

The presented oil pump balance shaft set is responsible for transferring drive to the oil pump in BMW N45/N46 engines used in E87, E90, and E91 bodies. Properly selected shafts ensure stable oil pressure, which translates into correct lubrication of the bearings, crankshaft, timing system, and other moving components of the engine.

By maintaining the factory geometry and matching the specific engine family, this part allows for the maintenance of proper lubrication system operation without the need for structural modifications. This is particularly important during preventive repairs or after an oil pump failure, when it is necessary to restore the original engine operating parameters.

Compatibility and compliance with replacement numbers

The element was designed as an original BMW part, which means full compliance with the manufacturer's factory requirements regarding dimensions, tolerances, and installation methods. The product has an assigned OEM part number and a set of interchangeable numbers, which facilitates verification of compatibility with a specific power unit and vehicle year.

The presence of reference numbers allows mechanics and users to quickly check compatibility with BMW catalogs and parts selection software. Thanks to this, the risk of purchasing an incompatible element is limited, and the repair planning process becomes more predictable and organized.

Installation characteristics and service application

The oil pump balance shafts in this configuration are intended for installation at factory mounting points, using standard BMW service procedures. The design provides for cooperation with the original oil pump used in N45/N46 engines, which allows for replacement both during routine repairs and during a comprehensive engine rebuild.

The product will work well in the following service scenarios:

• repair after a drop in oil pressure caused by wear of the pump drive,
• engine regeneration with mileage requiring replacement of lubrication system elements,
• preventive replacement during a major engine overhaul,
• engine rebuilding in youngtimer projects, where maintaining the original specification is key.

Due to its factory origin and fitment, the part allows for the preservation of serial engine operating parameters, without interference with control software or additional mechanical modifications.

Condition, verification, and benefits of using a used part

The offered element comes from the used parts group, which allows for economical repair while maintaining the original quality of workmanship characteristic of the BMW brand. Such components are often chosen for renovation projects and for maintaining older generations of E87, E90, and E91 models in good technical condition.

The use of original oil pump balance shafts from the secondary market brings a number of benefits:

• preservation of factory design and fitment for a specific engine,
• possibility of restoring the original lubrication system operating parameters,
• optimal ratio of repair cost to component durability,
• better predictability of installation compared to replacements of uncertain origin.

Support for renovation and modernization projects

Owners of older BMW generations, including models from 1998–2012, increasingly treat their cars as youngtimers, investing in conscious repairs and refreshing key subassemblies. The lubrication system is one of the areas where the use of original elements has a direct impact on the durability of the power unit and its operating culture. If you want to better plan the renovation of your car and use the potential of parts from the secondary market, it is worth reading the guide: The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years.

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as pump housings, drive gears, or additional oil drive components, check the available parts in the BMW Oil pumps and parts category.