BMW 3 E46 325i Z4 E85 2.5i Bare Engine M54 B25 256S5 192HP 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 3 E46 325i Z4 E85 2.5i Bare Engine M54 B25 256S5 192HP 59k miles, WARRANTY is a used, complete bare engine block from the M54 family, designed for BMW models with the 2.5i unit. This is a solution for users looking for a proven base for an engine overhaul or replacement in their vehicle while maintaining the original operating characteristics. By adhering to factory specifications, this bare engine provides a solid starting point for further service work or modernization projects.

Specifications and technical data

• SKU: 0140992
• 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

Purpose and unit characteristics

The presented bare engine belongs to the Engines category and is dedicated to petrol versions of the BMW E46 325i and BMW Z4 E85 2.5i with the M54 B25 unit. The design, based on an inline six-cylinder architecture, ensures the typical BMW refinement, smooth power delivery, and flexibility across the entire rev range. It is a good base for both standard operation and more demanding applications where stability and predictable drivetrain behavior are essential.

Technical construction and service potential

The inline cylinder layout of this unit facilitates a clear design and easier service access, which is important for major overhauls, seal replacements, or inspections of internal components. This generation of petrol engine works well with factory BMW electronics, allowing for the retention of stock performance parameters without the need for deep ECU modifications. The bare engine is suitable for workshops specializing in the BMW brand, as well as for advanced enthusiasts assembling their own accessories.

Application in BMW E46 325i and Z4 E85 2.5i

This powertrain is intended for installation in popular mid-range BMW models and roadsters, where a combination of dynamic characteristics and daily usability is valued. In the E46 325i, the M54 B25 engine provides smooth acceleration and comfortable highway driving, while in the Z4 E85 2.5i, it emphasizes the sporty character of the body, ensuring an adequate power reserve. By maintaining the original configuration, the engine works well with both manual and automatic transmissions factory-fitted for these models.

Benefits of choosing a used bare engine

Choosing a used M54 B25 bare engine allows you to optimize repair costs compared to purchasing a complete unit or a new replacement. This option is particularly beneficial when you are planning a full engine overhaul, replacing wear-and-tear parts, or selecting custom accessories for a specific application. A used bare engine offers the opportunity to maintain the original BMW specification while leaving room for conscious modifications, such as changing the intake or exhaust system, in accordance with project goals.

BMW Engines – expansion and compatibility

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 powertrains, check out the available parts in the BMW Engines category.

A safe choice for a used engine

When purchasing a used bare engine, it is worth paying attention to the service history, mileage, and how the unit was prepared for sale. It is good practice to perform additional measurements and checks before installation to minimize the risk of unplanned service downtime. If you want to better understand the specifics of BMW units and take a conscious approach to drivetrain durability, the article dedicated to problematic engines of this brand will be helpful: Troublesome BMW E90 engines: check what can ruin your budget!.

Who is this M54 B25 bare engine for?

This bare engine will be suitable for BMW owners who:

• are planning to replace a worn-out unit in an E46 325i or Z4 E85 2.5i while maintaining the original specification,
• are carrying out a restoration or reconstruction project while preserving the factory character,
• are looking for a solid base for an engine overhaul at a specialized workshop,
• want to combine reasonable purchase costs with the predictable performance parameters of a petrol unit.

For those who are just starting their adventure with car modernization and are considering using used components, a practical guide on the pitfalls of choosing parts may be helpful: Buying used car parts – the most common mistakes when choosing tuning parts.