Third party service/enhancement of electronics (Score 1)

If I understand DMCA correctly, third party service or after-market enhancements of any electronics gear would no longer be permissible. For example, aftermarket software for automotive proms (engine performance boosting, etc.) and independent repair of broken DVD players where the fix requires looking at the contents of _any_ part of the device configuration or the decoding software (even to the point of doing a checksum to verify that the program in question is 'bad')