I need four new bolts that hold the rear of the control arm to the body. I looked at the Porsche PET for the part number. I see two different bolts with two different part numbers. (#s 14 and 15 on the PET). I plugged those numbers into pelican parts website. They are both labeled as Control Arm/Cross Member bolts. Only difference between them is one is a M12x75 and the other is a M10x65.

One part number is N0403211, the other is N0101831

I can't figure it out.

 

Measure your bolts, evidently 1 is a 12 mm bolt and the other is a 10.

 

One is 75mm and the other 65mm. The number after the "M" is the thread size. As ^^ said just measure and get the same size.