BMW Z4 Series E85 2.5i Complete Engine M54 B25 256S5 192HP w 59k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

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

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

BMW Z4 Series E85 2.5i Complete Engine M54 B25 256S5 192HP w 59k miles, WARRANTY is a proven solution for drivers looking for a solid power unit for their roadster. This six-cylinder petrol engine provides the smooth operation and linear power delivery characteristic of BMW, while also allowing for economical operation. Thanks to its preserved mileage and factory configuration, it represents an attractive base for replacing a worn-out unit or for a professional rebuild.

Specifications and technical data

• SKU: 0140992-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0140992
• Substitutable numbers: 11000140992, 0140992, 11000140993, 0140993
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Mileage: 59 000

Technical characteristics of the M54B25 engine

The presented engine belongs to the esteemed series of BMW inline-six petrol units, known for their balanced operation and good throttle response. The cylinder configuration promotes low vibration, which translates into driving comfort, especially in the lightweight body of the BMW Z4 E85. The unit was designed for dynamic driving, but with proper maintenance, it maintains stable parameters even in daily use.

The M54B25 engine in the 2.5i version offers a balanced combination of performance and durability, making it a popular choice when replacing a worn-out powertrain in first-generation Z4 models. The design works well with both manual and automatic transmissions, and the availability of service parts facilitates subsequent maintenance.

Purpose and compatibility with the BMW Z4 E85

The engine was factory-intended for use in the BMW Z4 Series E85 2.5i, making it a perfect fit for the original engine bay architecture of this model. The mounting points, intake system, and accessory configuration are adapted to the specifics of the Z4, which minimizes the need for modifications during installation.

The unit is particularly recommended in situations where the existing engine has suffered a major mechanical failure or would require uneconomical repairs. Replacing it with a complete M54B25 engine allows you to restore the vehicle's full performance while maintaining the car's original character and factory operating parameters.

Benefits of installing a used BMW engine

Using a complete M54B25 engine in a BMW Z4 E85 is a solution that is often more economically advantageous than a complete overhaul of the existing unit. A used engine with documented mileage allows you to shorten vehicle downtime and simplify the repair process. An additional advantage is the preservation of the original BMW specification, which is important for both future diagnostics and the vehicle's value.

The petrol unit responds well to regular oil service and proper operation, so after professional installation, it can continue to perform reliably on the road for a long time. This is a particularly attractive solution for those who want to keep their Z4 as close to the factory configuration as possible, without experimenting with other engine types.

BMW engine zone – parts selection and technical knowledge

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

When choosing a power unit for a BMW, it is worth knowing the typical weak points of individual engine series and consciously choosing a solution that fits your driving style and budget. A practical guide regarding problematic units, which you can find in the article Troublesome BMW E90 engines: check what can ruin your budget!, may be helpful. This will make it easier for you to assess how to plan the service and operation of your engine to avoid costly surprises.

Summary

BMW Z4 Series E85 2.5i Complete Engine M54 B25 256S5 192HP w 59k miles, WARRANTY is a sensible proposal for Z4 owners looking for a proven, six-cylinder petrol unit with excellent operating culture. The original BMW design, compatibility with the E85 model, and the potential for further, predictable operation make it an attractive base for a professional powertrain replacement and restoring the car's full functionality.