In Reply to: Re: My factory chip seems to be soldered?? 95 M3 posted by Brian C on January 30, 2001 at 11:46:51:
The "chip" in question has 28 pins, divided into two 14 pin rows. The pins are spaced exactly 1/10 inch apart and there is solder on both sides of each plated-through hole. It takes (as mentioned in a previous post) a very small tip iron at a controlled temp and a method for removing the solder without damaging the board. Then the new chip is inserted (correctly) and resoldering begins. This is not a job for an amateur and the damage risks are very high. New ECU are very expensive. BTW, I worked as a NASA-trained computer tech for many years.
My advice, unless you're experienced with this technology and have the tools and skills, send it out.
(BTW, the OBDII cars have flash memory that can be erased and reprogrammed by devices like Jim C's Shark Injector).