BMW Z4 E85 E86 3.0si Bare Engine Petrol N52 N52B30A with 59k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

BMW Z4 E85 E86 3.0si Bare Engine Petrol N52 N52B30A with 59k miles, WARRANTY is an original, used engine block from the N52 family, designed for the sporty Z4 3.0si versions. This six-cylinder inline petrol unit ensures smooth operation, high refinement, and characteristic, dynamic power delivery. It is the ideal solution for users who want to restore the full efficiency of the drivetrain while maintaining factory specifications and mechanical consistency of the entire powertrain.

Specifications and technical data

• SKU: 0421061
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0421061
• Substitutable numbers: 0421061, 11000421061, 0421062, 11 00 0421062
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Engine code: N52B30A
• Mileage: 59 000

Technical characteristics of the N52B30A engine block

The presented engine block belongs to the Engines category and serves as a base for completing a full powertrain unit in the BMW Z4 E85/E86 3.0si. The design, based on an inline six-cylinder petrol configuration, ensures even crankshaft load, low vibration, and predictable behavior at high RPMs. The N52B30A engine is valued for its modern construction, favorable curb weight, and good throttle response, which translates into precise vehicle handling and stable performance.

The bare engine block is the proper base for transferring accessories from the previous unit – this allows for maintaining compatibility with the existing electrical installation, control system, and auxiliary equipment. Such a configuration facilitates control over the assembly process and enables informed selection of additional components according to individual service requirements.

Application in the BMW Z4 E85/E86 3.0si

The N52B30A engine in the bare block version is intended for installation in BMW Z4 E85 and E86 models in the 3.0si variant, where maintaining the original operating characteristics of the powertrain is crucial. The inline-six petrol engine fits perfectly into the sporty character of the Z4, providing linear power development and appropriate flexibility across the entire rev range. Thanks to the preservation of the factory engine code, seamless matching with the stock ECU and the existing vehicle configuration is possible.

This type of unit will work well both for a standard replacement of a damaged engine and for more advanced renovation projects where compliance with the manufacturer's original specification is important. The structural consistency of the block with factory BMW solutions limits the risk of assembly issues and subsequent diagnostics.

Benefits of choosing a used engine block

Choosing a used N52B30A engine block for the BMW Z4 3.0si is a reasonable compromise between costs and maintaining the manufacturer's original technology. A used unit allows for significant expenditure reduction compared to a brand-new engine, while maintaining a proper base for further service. An additional advantage is the possibility of using existing accessories, which simplifies repair logistics and shortens vehicle downtime.

To better plan an investment in a used engine, it is worth reading an expert guide discussing facts and myths regarding such components, procedures for selection by VIN/OEM, and cost ratios – this is described in detail in the article Why it is worth buying used gearboxes and engines – facts instead of myths. It allows for an informed approach to the purchase and a proper assessment of the potential of a used powertrain unit.

Practical assembly and operational tips

When installing a bare engine block in the BMW Z4 E85/E86 3.0si, it is recommended to carry out a full service procedure, including leak checks, verification of the condition of accessories transferred from the old unit, and replacement of consumables in accordance with the manufacturer's recommendations. Such an approach minimizes the risk of unplanned downtime and allows for fully utilizing the potential of the inline-six petrol engine.

In the case of older vehicles, where the availability of new parts is sometimes limited, a guide on using dismantled parts may be helpful – this is described in more detail in the article No parts at the dealership? How to deal with repairing older models using dismantled parts. The tips contained therein facilitate optimal repair planning and the selection of components accompanying the engine replacement.

Expanding the powertrain within the BMW Engines category

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional blocks, short blocks, or cylinder heads, check the available parts in the BMW Engines category.