2000 Dodge Avenger Acceleration problems

I have 2 dodge cars, both 2000, an intrepid and an avenger. The speed sensor has gone out in both cars in the beginning of the year 2002. Both happened while driving on a highway, causing immediate deceleration. I sent a letter to chyrsler in july of 2002, but got no response. I have the invoices from the repairs and the part # is the same on both cars. *Jb