BMW F40 X1 F48 Mini F55 F56 Engine Cylinder Head B38B B38C Petrol 7934488

BMW F40 X1 F48 Mini F55 F56 Engine Cylinder Head B38B B38C is an original, used cylinder head from the Cylinder Heads category, designed for modern B38 series petrol engines. It provides a solid foundation for professional repair or refurbishment of the engine system in newer generation BMW F-series and Mini vehicles. Thanks to its factory design, it ensures proper mixture guidance and combustion chamber tightness in petrol engines.

Specifications and technical data

• SKU: 7934488
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7934488
• Substitutable numbers: 7934488, 11127934488
• Fuel type: Petrol
• Category: Cylinder Heads

Purpose and compatibility

The presented cylinder head is an engine system component designed for B38B and B38C petrol units used in BMW F40, BMW X1 F48, and Mini F55 and F56 models. The head's design is optimized for operation with a modern three-cylinder petrol engine, which allows for maintaining proper cylinder filling parameters, exhaust gas discharge, and thermal stability.

Its original origin from the BMW/Mini group means that factory manufacturing tolerances are maintained, which facilitates installation in place of a worn or damaged component without the need for engine accessory modifications.

Construction and function in the engine system

The cylinder head in a B38 petrol engine plays a key role in forming the combustion chamber, guiding intake and exhaust ports, and mounting timing components. It is responsible for:

• maintaining the tightness of the combustion chamber between the block and the valve train,
• guiding intake and exhaust ports for the air-fuel mixture and exhaust gases,
• stable seating of valves, guides, and valve seats,
• dissipating heat from the combustion area to the cooling system.

Thanks to the precise geometry of the ports and a properly designed combustion chamber, the head supports efficient petrol engine operation, correct mixture combustion, and the maintenance of proper engine performance.

Benefits of using an original cylinder head

Using an original cylinder head in a B38B/B38C engine allows for maintaining the operating parameters specified by the manufacturer. The most important advantages include:

• Factory fitment for BMW F40, X1 F48, and Mini F55/F56 units,
• preservation of the original geometry of intake and exhaust ports,
• possibility of professional refurbishment and workshop machining,
• consistency with engine accessories, timing system, and cooling system.

For workshops and users, this means predictable installation, easier parameter control after repair, and the ability to restore proper petrol engine operation without experimenting with replacements of uncertain origin.

Condition, preparation for installation, and service application

The head comes from the secondary market and is offered as a used component, intended for further service processing in accordance with manufacturer procedures or the standards of a given workshop. Before installation, it is recommended to perform a full workshop diagnostic, including checking flatness, tightness, and potential refurbishment of valve seats and guides, to ensure long-term and stable engine operation.

A component prepared in this way allows for an economical yet technically correct repair of a petrol engine in BMW and Mini vehicles, especially where maintaining the original design and compatibility with existing accessories is important.

Mini Cylinder Heads – expansion and engine system modernization

If you are planning a comprehensive repair or modernization of the engine area in your Mini and need other components from the same group, such as cylinder head housings, valve covers, or mounting elements, check the available parts in the Mini Cylinder Heads category.

More information about used parts

If you want to better plan your repair and learn practical tips regarding the selection of original components from the secondary market, it is worth checking out our guide: The best used car parts – a guide to the most frequently chosen original parts for popular car brands and models.