Used Bosch AS4 Engine ECU Tested, with Warranty

The Bosch AS4 is an engine ECU (ECM) from the Bosch AS range. This unit controls injection, ignition according to configuration, actuators, and communication with the vehicle network. We offer here a used Bosch AS4 tested, sold as is. It is a raw, uncoded part: after installation, coding/pairing is mandatory to disable the immobilizer and associate the VIN. This operation can be carried out by an equipped professional or as an optional paid service via our configurator. Before purchase, check that the Bosch reference and hardware/software index match your setup. Our quality control checks the electrical operation and communication of the ECM to provide a sound basis for correct adaptation to the vehicle. The Incarline warranty applies to the part according to our conditions, without including default programming.

Overview: Role of the Bosch AS4 Engine ECU (ECM)

The Bosch AS4 engine ECU is the electronic heart of engine management. It collects information from sensors (pressure, temperature, position, air flow depending on engine type), processes this data, and controls actuators (injectors, idle actuators, turbocharging components, ignition management on relevant engines). It also ensures communication with other vehicle modules via the multiplexed network, as well as immobilizer management.

In the Bosch AS range, the Bosch AS4 comes in hardware and software variants adapted to the engines and automotive manufacturers concerned. This is why pairing after installation is imperative: without coding the VIN and immobilizer data, the starter may be inhibited or the engine will refuse to start. The unit offered is a tested used part, provided as is, ready to be coded by a professional or via an optional paid service selectable on our configurator.

Your ECU at Incarline: Tested Used Part, Sold As Is, Quality Control and Warranty

Each Bosch AS4 offered by Incarline is a tested used part. Our checks cover power supply, communication with a suitable diagnostic tool, and essential functions accessible outside the vehicle, to ensure the ECM is a functional base. The casing is then cleaned and labeled to ensure traceability. We sell this unit as is: it is not cloned, programmed, or coded by default.

Mandatory coding/pairing: after installation, the immobilizer and VIN must be paired to allow starting. This step can be performed by your garage or, if you wish, via optional paid services (cloning, programming, immo off, or exchange) selectable in the configurator before order confirmation. These services are never included by default.

Warranty and Trust: The Bosch AS4 ECM benefits from the Incarline warranty on the part according to our conditions. The goal is to provide you with a used ECU whose basic functions are checked, to limit uncertainties at the time of coding and integration. We remain available to verify reference consistency before purchase, based on the label information of your old ECU.

Before finalizing your Bosch AS4 order, ensure: that the Bosch reference matches, that the hardware/software index is compatible, that you have a solution for coding (equipped professional or optional service via our configurator). By respecting these points, you secure the purchase of a tested used Bosch AS4 and save time when restarting the vehicle.