HOW DO YOU FIGURE OUT IF A 2001 A6 4.2 L VIN #WAUZL64B51N076764 ENGINE 2001 A8 #WAUML54D21N011571
you see the b5 and d2? that is the frame code. If your still unsure open your trunk lift the spare tire cover and look at the back of the donut hole. There will be a label there stating your engine code trany code excetra.
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