When I had my engine replaced the guys at the shop noticed this same wire was broken and was probably broken for a long time due to the corrosion on it. I never noticed anything with the old engine when turning at lower speeds. Never had a CEL and the engine never stumbled. When the shop replaced the engine the speed sensor was on back order so for the first month, or so, with the new engine I didn't have the sensor and, again, didn't notice anything. The shop installed the sensor once it came in from Isuzu (and yes, it wasn't cheap) and I really didn't notice any difference with it installed.