BMW F20 LCI 118i B38 136HP ECU Kit DME 8691836 + 2 Keys + FEM + Lock Manual

BMW F20 LCI 118i B38 136HP ECU Kit DME + 2 Keys + FEM + Lock Manual is a professionally selected package of engine and vehicle security control components, including the DME controller, FEM module, two keys, and a lock for the manual transmission version. The kit is designed for the B38 petrol engine with 136 HP, allowing for a consistent, technically correct replacement of control electronics in this specific variant of the facelifted (LCI) BMW 1 Series. As a result, you receive a cohesive set of components that facilitates the restoration of full functionality to the powertrain and vehicle start system.

Specifications and technical data

• SKU: 8691836-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8691836
• Substitutable numbers: 8691836, 0 261 S18 529, 0261S18529, 6843901, 61356843901
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and kit configuration

The presented ECU kit has been prepared for the BMW F20 LCI 118i model with a 136 HP B38 petrol engine, working in conjunction with a manual transmission. The set includes the DME engine controller, the FEM module responsible for managing body functions and authorization, two keys, and a lock, which allows for maintaining the integrity of the immobilizer system and comfortable vehicle starting after the electronics replacement.

A package configured in this way is particularly useful when replacing a damaged engine controller or when it is necessary to transfer the complete control system to another chassis as part of post-accident repairs or advanced upgrades.

Functionality of the DME controller and FEM module

The DME controller in this kit is responsible for precise management of the three-cylinder B38 unit – from fuel injection and ignition control to cooperation with OBD diagnostic systems. The use of a dedicated ECU for a specific engine version and fuel type ensures correct operating maps and compatibility with the factory electrical installation.

The FEM module plays a key role in integrating the engine controller with the vehicle's security system, key handling, and selected body functions. The presence of two keys in the set facilitates vehicle configuration after installation and allows for maintaining the convenience of daily operation, while the matched lock ensures mechanical consistency with the electronic system.

Application in repairs and upgrades

The complete ECU kit with keys and FEM module is a practical solution in situations where repairing a single controller is unprofitable or technically difficult. Using a ready-made package allows for reducing the time required for programming and matching individual elements, as the components come from a single vehicle configuration.

In workshop practice, such a set is effective for:

• replacing a damaged engine controller in a BMW F20 LCI 118i B38,
• mechanical and electronic swaps after collisions,
• resolving issues with key authorization and the immobilizer in petrol versions with a manual transmission.

This allows for an orderly restoration of the powertrain and starting system, minimizing the risk of conflicts between modules.

Category characteristics and BMW electronics selection

The product belongs to the Electronic control modules and controllers group, which are components responsible for engine operation logic and integration with other vehicle systems. In the case of modern petrol units such as the B38, the correct selection of the ECU, FEM module, and keys has a direct impact on engine stability, diagnostic capability, and anti-theft security.

If you are planning a comprehensive repair or upgrade of the engine control and security system area in your BMW and need other elements from the same group, such as additional controllers, body modules, or comfort management systems, check the available parts in the BMW electronic control modules and controllers category.

Condition, origin, and practical tips

The offered kit comes from dismantling and is a used item, which in the case of BMW electronics often represents a reasonable compromise between cost and functionality. By choosing such a set, you gain original components that are factory-matched, which facilitates integration with the vehicle's installation and limits the need for deep programming intervention.

To better plan your repair and consciously decide when it is worth reaching for used control modules, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the selection of ECUs and other automotive electronics components.