I am replacing the steering rack on a 2009 Jetta TDI my part number is 1K1423051CL. I found a used part # 1K1423051DL it is slightly different but bolts in fine. The wireing to the steering motor plugs in but the plug from the control unit on the fire wall is slightly different. Both are two wire and the wires are the same color. When I hook it up I get "1 Fault Found:01309 - Power Steering Control Module (J500) 008 - Implausible Signal". The salvage yard where I got the used part says it should work. Does anybody know if these units are interchangable?