BMW AK90+ V3.19 EWS Key Programmer
The BMW AK90+ Key Programmer is a specialized desktop tool for reading and writing compatible BMW EWS immobilizer modules and preparing replacement transponder keys. It is designed primarily for selected BMW vehicles equipped with EWS2, EWS3 or EWS4 systems manufactured approximately between 1995 and 2009.
The AK90+ connects to a Windows computer through USB. The EWS module must normally be removed from the vehicle and connected to the supplied adapter for reading, data inspection and authorized key preparation.
Main Features
- Reads compatible BMW EWS immobilizer data
- Supports selected EWS2, EWS3 and EWS4 modules
- Reads and writes supported EWS MCU data
- Displays available key-position information
- Identifies enabled and disabled key positions
- Prepares compatible replacement transponder keys
- Writes key data to supported blank transponders
- Allows backup and restoration of EWS data
- Displays available VIN and module information
- Supports selected BMW vehicles from approximately 1995–2009
- Connects to a Windows computer through USB
- Supplied with EWS and transponder adapters, depending on package
- Software version commonly supplied as V3.19
EWS Module Reading
The AK90+ reads data directly from the compatible EWS module. Depending on the module version, the technician may need to:
- Remove the EWS unit from the vehicle
- Open the EWS enclosure
- Clean the MCU contact points
- Select the correct MCU type in the software
- Position the correct adapter over the processor
- Read and save the original EWS data
Always create and safely store multiple verified backups before making any changes.
Key Information
After successfully reading a supported EWS module, the software can display available information such as:
- EWS module type
- Vehicle identification information when available
- Available key positions
- Used and unused key slots
- Enabled or disabled key status
- Selected key data required for key preparation
The information available depends on the EWS version and the condition of its stored data.
Replacement Key Preparation
The BMW AK90+ can write calculated key information to a compatible transponder. This allows an authorized locksmith or technician to prepare a replacement key for a supported EWS-equipped BMW.
A suitable key blade must still be cut mechanically to match the vehicle. Remote-control synchronization may also require a separate procedure after preparing the transponder.
Supported EWS Systems
The tool is intended for selected versions of:
- BMW EWS2
- BMW EWS3
- BMW EWS3+
- BMW EWS4
- Compatible Rover or Land Rover applications using related EWS technology, where explicitly supported
Exact compatibility depends on the EWS module, MCU version, software and adapter supplied with the package.
Vehicle Coverage
The AK90+ is commonly used with selected older BMW models from approximately 1995–2009, including some versions of:
- BMW 3 Series
- BMW 5 Series
- BMW 7 Series
- BMW X3
- BMW X5
- BMW Z Series
- Other BMW models equipped with a compatible EWS system
Vehicle year alone does not confirm compatibility. The installed immobilizer system and MCU type must be checked before purchase.
Basic Operating Procedure
- Install the AK90+ software and USB driver on a compatible Windows computer.
- Remove the EWS module from the vehicle.
- Identify the EWS version and MCU type.
- Connect the AK90+ and select the correct adapter.
- Position the adapter correctly on the MCU.
- Read the EWS data several times.
- Compare and save verified backup files.
- Select an available key position.
- Insert a compatible transponder into the key adapter.
- Write the replacement key data.
- Verify the newly prepared key.
- Reinstall the EWS module and test the key in the vehicle.
Important Compatibility Notice
The AK90+ does not support every BMW manufactured between 1995 and 2009. It supports compatible EWS immobilizer systems only.
It does not support:
- BMW CAS1, CAS2, CAS3 or CAS4 systems
- BMW FEM or BDC systems
- Modern BMW G-Series immobilizer systems
- General OBD2 vehicle diagnostics
- Engine, ABS or airbag fault-code diagnosis
- Key cutting
- Every transponder type or EWS MCU version
For CAS-equipped BMW vehicles, a compatible CAS key programmer is required. FEM and BDC vehicles require a suitable modern BMW immobilizer programming solution.
Technical Requirements
- Compatible Windows computer
- Available USB port
- AK90+ software and driver
- Correct EWS MCU adapter
- Compatible blank transponder
- Stable computer power
- Basic electronic and immobilizer-service experience
Software compatibility with modern Windows versions can vary. Some packages may require manual driver installation or an older compatible Windows environment.
Professional Use and Safety
- Use the tool only on vehicles you own or are legally authorized to service.
- Verify the vehicle ownership and customer identity before performing immobilizer work.
- Disconnect vehicle power according to the manufacturer’s procedure before removing the EWS module.
- Never write data without first creating verified backups.
- Incorrect adapter placement may damage the EWS processor.
- Do not repeatedly force or move the adapter while power is connected.
- Protect original EWS data because corrupted or lost data may prevent the vehicle from starting.
- Package contents and supplied transponders may differ according to the selected seller option.
Explore more automotive key and ECU programming toolshttps://diagzonelb.com/product-category/ecu-programming-tools/
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