BMW E90 E92 E93 M3 420HP V8 Bare Engine S65 S65B40A with 34k 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 E90 E92 E93 M3 420HP V8 Bare Engine S65 S65B40A with 34k miles, WARRANTY is an advanced V8 powertrain unit designed for the sports versions of the BMW 3 Series E9x generation. It is offered as a bare engine block, which serves as a solid foundation for a professional rebuild or a swap in M3 vehicles. This solution is intended for users seeking a precise, high-revving gasoline engine with a distinctly sporty character.

Specifications and technical data

• SKU: 0442123
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0442123
• Substitutable numbers: 11000442123, 0442123, 11000428218, 0428218, 11000442124, 0442124, 11000428221, 0428221, 2303727, 11002303727, 11303728, 11002303728
• Fuel type: Petrol
• Number of cylinders: 8
• Category: Engines
• Engine code: S65B40A
• Mileage: 34 000

Technical characteristics of the S65B40A engine

The engine belongs to the family of naturally aspirated BMW V8 units, designed for dynamic track and road driving. The eight-cylinder V-layout construction ensures smooth power delivery and rapid revving, which is particularly valued in the E90, E92, and E93 generation M3 models.

The unit runs on gasoline, allowing for high specific power and quick throttle response. The eight cylinders promote smooth operation across the entire rev range, and the characteristics of the S65B40A engine are well-known in the motorsport community and among BMW enthusiasts as a base for projects with a distinctly sporty profile.

Purpose and application in BMW M3 E90 / E92 / E93

The offered bare engine block is dedicated to the BMW M3 generation E90 (sedan), E92 (coupe), and E93 (convertible). This form of delivery means that the user receives the base of the powertrain unit, prepared for further configuration of accessories according to individual project or service requirements.

This type of solution is particularly beneficial when:

• a comprehensive engine rebuild using new or refurbished accessories is planned,
• an engine swap is being carried out within the E9x M3 platform,
• it is necessary to replace a damaged block or engine core while retaining existing auxiliary components.

Thanks to this, it is possible to flexibly select the remaining elements of the drivetrain, adapting them to a specific application – from a road car to a track project.

Condition, mileage, and operational potential

The engine comes from the category of used powertrain units, which is important when planning a repair or upgrade budget. The declared mileage allows for an assessment of the potential for further operation after performing standard service procedures and workshop inspection.

In practice, this means that the engine core can serve as a good base for:

• a major overhaul with the replacement of wear-and-tear parts,
• building an engine for sports applications,
• professional refurbishment at a specialized BMW or M-Power service center.

Before installation, it is recommended to perform a detailed verification of the unit at a workshop specializing in BMW M engines, which will allow for optimal preparation for further operation.

Benefits of using an original BMW V8 engine

Choosing an original engine core from the S65 family brings a number of practical advantages compared to replacement units or those adapted from other models:

• Full structural compatibility with factory mounting points and the BMW M3 E90/E92/E93 drivetrain.
• The ability to use existing accessories and vehicle electronics, which facilitates the installation and configuration process.
• Better predictability of the unit's behavior after an overhaul due to the well-known characteristics of the S65B40A engine.

For users who want to maintain the original character of the M3, using this unit is a natural choice, allowing for the consistency of the entire drivetrain to be preserved.

Parts selection and technical support

The engine belongs to the Engines category, which makes it easier to search for compatible elements within the same product group. Interchangeable numbers and OEM part numbers are also available in the database, allowing for precise verification of compatibility with a specific vehicle configuration.

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 blocks, cylinder heads, or complete powertrain units, check the available parts in the BMW Engines category.

For E90 series users who want to better understand common powertrain issues and consciously plan their repair budget, the following article will be helpful: Troublesome BMW E90 engines: check what can ruin your budget!