Take the steering column housing off (usually held by 4 screws from the bottom) and remove the starter cap from the back of the ignition cylinder. In a Nissan, the ignition cylinder usually has a T shaped pin which turns the starter. if you can start your vehicle by turning the starter cap with a screw driver, you probably don't have an issue with the starter.
It seems that there could be a problem with your starter. It happened to me too.
There are many different reasons why the Nissan Altima won't start. It could have a dead battery, a bad starter or even the engine. It is best to take it to a mechanic for them to diagnose the problem.
Dead battery, faulty starter, or defective ignition switch.
Where is the starter located on a 1994 altima engine
How do you know if the starter needs to be replaced on a 1993 Nissan Altima?
MY 03 ALTIMA HAD THE SAME PROBLEM I HAD TO REPLACE THE CAM SENSORS AND THE PROBLEM WAS SOLVE
The 2013 Nissan Altima does not have a mechanical keyhole. The 2013 Altima features the intelligent key which is a push button ignition. The push button ignition began with the 2013 models.
how to change a ignition switch on a nissan altima 2003
starter is located next to engine at front of transmissin
Maybe its the starter?!?!?!
The starter is located beneath the throttle body. Remove the intake tube, then the starter bolts can be removed and the starter replaced.
No - See Link