is a legacy CD receiver released around 2008. Currently, there are available for this specific model on Kenwood’s primary support portal , as it predates the era of frequent over-the-air or USB-based system software maintenance common in modern head units. Bluetooth Module Firmware While the main system firmware is static, the KDC-MP438U
A PC with Bluetooth capability or a Bluetooth USB dongle. Kenwood Kdc Mp438U Firmware
Update files and procedures for the Bluetooth module can be found on Kenwood’s Bluetooth Support Page . Checking Your Current Version is a legacy CD receiver released around 2008