Just about everyone I know uses the ones from TQ Racing. They are available in a bunch of lengths from 50mm to 200mm. The wires are very pliable, so they don't bind the pods on pan cars. Some people even go as far as to cut the flexible sheath off of them to make them even more pliable.
About the only thing that causes them to go bad is pulling them out by the wires, or getting damaged in a crash (especially touring car, since the motor end bell is exposed).
The Tekin RS / RS Pro has a sensor diagnostic function. Have the ESC powered up, and turn the motor by hand. LEDs 5, 6, 7 should light up (dimly) in sequence as the rotor is turned by hand. That at least shows that the sensor wire and sensor board are OK. If they don't light up, one or both are bad.
*** The Gate - Celebrating 7 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car