Two problems related to speed sensor have been reported for the 2003 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Nissan Altima based on all problems reported for the 2003 Altima.
My daughter was driving home from work in my 2003 Nissan Altima when the car suddenly stopped running, the steering wheel froze and she nearly ran off the road. Thank goodness there were no other cars coming and she was able to pull off the road with no incident. I pulled the codes and found it to be the p0335 (crankshaft position sensor) and p0725 (engine speed sensor). After searching the web, it appears there are many people with the same issue. I looked on the NHTSA website and found NHTSA campaign id number: 03v455000, Nissan recall no. R3022 that states exactly what did happen - the check engine light came on and the engine stopped without warning. The remedy is that a dealer replace the crankshaft position sensor. So, I called Nissan, found the other recall that is related to the sensor, took the car to the dealer (barely - I drove and the car stopped twice - again, lucky there was no crash). The dealer called and said he could not fix this recall because the sensor was bad. Now I have to go back and pickup the car and pray again that I don't have a crash coming home. Seems totally unreasonable that Nissan would have a recall for this exact problem - the crankshaft position sensor - for, among many others, 2002-2003 Altimas and yet there are many people out there with these cars that Nissan won't fix. I was laid off and certainly cannot afford a $300 fix for a $40 part so we will have to drive this death car until I can figure out how to get it fixed. And pray every time I get in it that we don't end crashing the car, hurting myself, my young twins, my older daughter or anyone else on the road. This is a severely dangerous issue and Nissan should replace all cars - not just a select few.
Recently while driving my ses light came on. I took my vehicle to the nearest service center and had them read the codes which were 0725 engine speed sensor and 0335 crank shaft position sensor. Upon looking into the problem I found that this is a common problem with many Nissan owners, particularly the Altima models. Nissan has issued a recall to reprogram the ecm free however this does not solve the problem. The problem is the crankshaft sensor, and Nissan should be responsible for replacing the defective part (the part has been modified from plastic to metal because of other complaints however they will not cover the replacement, ridiculous!) this is particularly dangerous due to the fact that I can cause the car to stall randomly while driving, which has happened to me on two occasions (luckily not in heavy traffic of on the highway! but it has happened in more serious situations to others).