BMW Z4 E85 E87 E90 N46 Petrol Mechanical Coolant Pump 7574119

The BMW E87 E90 N46 Petrol Water Pump is an original cooling system component designed for BMW N46 petrol engines, used in models such as the E87 and E90. Thanks to its factory design, it ensures proper coolant circulation and stable thermal conditions for the engine. A used OEM part is a sensible choice for drivers looking for a proven component at an attractive price.

Specifications and technical data

• SKU: 7574119
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7574119
• Substitutable numbers: 11517574119, 7574119, 7529370, 7500335, 32427500335, EM
• Fuel type: Petrol
• Category: Water Pumps

Purpose and Role in the Cooling System

The water pump in the N46 engine is responsible for the forced circulation of coolant between the engine block, cylinder head, radiator, and heater core. A properly functioning pump:

• maintains the stable operating temperature of the petrol engine,
• reduces the risk of overheating under heavy load,
• supports efficient heat dissipation from critical engine zones.

By being tailored to the specifics of the N46 engine, using this pump allows for the preservation of the cooling system's original operating parameters, which translates to engine durability and predictable vehicle behavior in urban traffic and on the road.

Compatibility and OEM Selection

The offered pump belongs to the Water Pumps group dedicated to the BMW brand and has been designed as an OEM component, which facilitates selection by part number and interchangeable numbers. This allows a mechanic or service advisor to quickly verify compatibility with a specific engine version and vehicle year, minimizing the risk of installing an incorrect component.

The presence of reference numbers also allows for easy comparison with other pump variants used in the BMW petrol engine family, which is important when planning repairs, upgrades, or overhauls of the cooling system.

Technical Characteristics and Operation

The water pump designed for N46 petrol units operates under demanding temperature and mechanical conditions, so its construction is adapted for continuous operation across a wide range of RPMs. A correctly selected component:

• ensures adequate coolant flow across the entire engine load range,
• reduces the risk of cavitation and localized overheating,
• works with other cooling system components without requiring modifications.

A used OEM water pump is a solution that preserves the original geometry of the impeller, housing, and connections, which facilitates installation and subsequent service. For petrol engines, stable operating temperature control is particularly important, influencing mixture combustion, exhaust emissions, and the overall smoothness of the unit's operation.

Practical Application and Advantages of Choosing OEM

Choosing an original BMW water pump for the N46 engine is beneficial for both workshops and individual users. Key advantages include:

• certainty of fit for the specific petrol engine configuration,
• preservation of the original coolant flow characteristics,
• easier diagnosis of potential future faults due to unambiguous OEM marking.

A used OEM part from the Water Pumps category can also be an attractive basis for potential refurbishment, if the workshop employs such service procedures. This allows for cost optimization while maintaining a high-quality component.

Technical Support and Additional Materials

To better understand the relationships between the water pump, fuel system, and overall engine thermals, it is worth consulting educational materials. A detailed discussion on selecting parts by OEM numbers, diagnostic principles, and refurbishment can be found in the article “Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Refurbishment”, which helps to organize knowledge about the cooperation of key engine components.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as pump housings, seals, or additional mounting elements, check the available parts in the BMW Water Pumps category.

Summary

The BMW E87 E90 N46 Petrol Water Pump is a used, original OEM water pump designed for N46 petrol engines. It ensures assembly compatibility with the factory cooling system, supports stable engine operating temperature, and is a practical solution for drivers and workshops looking to combine manufacturer part quality with service cost control.