Obdii can bus Compatible with the newest cars which require a direct can connection for diagnostics including all golf-5 platform cars and latest audi a3, a6 and a8, q7, etc. Protocol timing indistinguishable from a real vag/vas tool. Works reliably even with "difficult" control modules such as the 1991-1994 1z audi tdis and the 1993-1994 audi 2.6l with hella ecu. Built-in vag-saver functionality -- instantly alerts the user if either the k/k1 line or the l/k2 line is shorted to ground or vbatt. Full support for dual-k lines found in "new" (b6/8e chassis audi a4 and 2002+ audi a6, a8, q7, etc.