CD/USB receiver firmware updates

Improved functions


  • Improved stability. (Model group A)


  • Fixed the problem of no sound after starting the engine.

The firmware for the following products have been updated.

Model group Models
KDC-461U U494BT U494
B KDC-X598 KDC-X398 KDC-BT558U
KDC-358U KMR-D558BT KMR-D358
C KDC-X498 KDC-HD458U  

Be sure to read and follow the instructions in the "CD/USB Receiver Firmware Update Guide."

"CD/USB Receiver Firmware Update Guide (ENGLISH)" download (PDF:31KB)

Software License Agreement

You must agree to the following conditions before downloading this update program.

  • A written permission from JVC KENWOOD Corp. is necessary in order to redistribute this software on your personal web page.
  • Modification, alteration, translation, merging, reverse compiling, or reverse engineering of this software is prohibited.
  • JVC KENWOOD Corp. is the sole owner of all copyrights and intellectual property rights of this software and accompanying manuals and other documents.
    This software is not sold but licensed to the user by JVC KENWOOD Corp. The customer has ownership only of the media containing this software and the ownership of the software itself is reserved by JVC KENWOOD Corp.
  • JVC KENWOOD Corp. does not guarantee the suitability of this software or its quality and function for the customer's use and will not be liable for any problems caused by the use of this software except as explicitly noted.
    The customer is responsible for the selection and installation of this software as well as the result of using this software.

Download file

Model group A

Target Model: KDC-X700BT, KDC-X400, KDC-BT44U, KDC-461U, U494BT, U494
File "te1316e.krm " download (1.9 MB)

Model group B

Target Model: KDC-X598, KDC-X398, KDC-BT558U, KDC-358U, KMR-D558BT, KMR-D358
File "te1313k.krm" download (1.9 MB)

Model group C

Target Model: KDC-X498, KDC-HD458U
File "te1318k.krm" download (1.9 MB)