Seat Leon 5F FR 1.8 TFSI CJSA 231HP Quattro Engine ECU 06K907425B Automatic

Seat Leon 5F FR 1.8 TFSI CJSA 231HP Quattro Engine ECU is a factory electronic control module designed for petrol units paired with an automatic transmission. This used Engine Control Unit ensures precise engine management, supporting stable power, smooth throttle response, and proper operation with the all-wheel-drive system.

Specifications and technical data

• SKU: 06K907425B-12
• Mark: Seat
• Condition: Used
• OEM Part Number: 06K907425B
• Substitutable numbers: 06K907425B, 06K 907 425 B, 5WA18004, 8V0906264H, 8V0 906 264 H, 5Q0937084CQ, 5Q0 937 084 CQ, A2C10391104, 1K0905851, 1K0 905 851
• Fuel type: Petrol
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented control unit belongs to the Electronic control modules and controllers group and is responsible for comprehensive management of the 1.8 TFSI unit in the FR version with Quattro drive. It controls, among other things, fuel dosage, ignition timing, auxiliary equipment operation, and communication with the automatic transmission, which translates into dynamic yet predictable vehicle behavior in various road conditions.

Thanks to dedicated software, the ECU is matched to the characteristics of the petrol engine, ensuring proper operating parameters both during calm driving and in the more sporty mode typical of the FR version.

Benefits of using an original ECU

Using an original engine control unit in a Seat Leon 5F FR allows for maintaining the factory logic of the drivetrain systems. This is particularly important in configurations with Quattro drive and an automatic transmission, where the ECU communicates with many other modules in the vehicle.

• Stable operation of the petrol unit – correct injection and ignition maps matched to the 1.8 TFSI engine.
• Consistent cooperation with the automatic transmission – the ECU transmits and receives signals necessary for smooth gear shifting.
• Better compatibility with factory vehicle systems – no need to experiment with universal solutions.
• Possibility of diagnostics compliant with factory procedures – easier service work and faster resolution of potential faults.

Selection, installation, and compatibility

When selecting an engine control unit for a Seat Leon 5F FR, it is crucial to match it to the specific engine version, fuel type, and transmission type. This ECU has been designed to work with a petrol engine and an automatic transmission, which minimizes the risk of communication issues between modules.

Before installation, it is recommended to verify compatibility by OEM number and interchangeable numbers, as well as to consult an electrician or diagnostician who will confirm the possibility of adapting the controller to a specific vehicle. In many cases, programming or immobilizer coding procedures are required, so installation is best entrusted to a workshop with appropriate diagnostic equipment.

To better understand the principles of selecting used electronic modules, including ECUs, it is worth reading the Global Parts guide – Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?, where issues such as hardware and software compatibility and practical installation examples are discussed.

Characteristics of the used module

The offered engine control unit is a used item, which means it comes from disassembly and was previously operated in a vehicle. This type of solution is often chosen as a technically sound alternative to new components, allowing for a significant reduction in repair costs while maintaining the manufacturer's original specifications.

In the case of used ECUs, it is particularly important that they come from a reliable source and are selected based on compatibility with the specific vehicle configuration. Additional information on the advantages and common opinions regarding used components can be found in the article Used car parts: Myths and facts you need to know, which helps dispel doubts related to choosing second-hand parts.

Expansion of the control system in the Seat

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