2003 nissan xterra engine stalled at red light. unable to start.

Check your crank sensor

replace oxygen sensor

Hi Slim Jim,Here's a link to a pic where your oxygen sensor is. 2000 2004 Nissan Xterra Oxygen Sensor O2 Sensor Location V6 Engine Here's another link to some new oxygen sensors.Get the exact fit ones. Oxygen Sensor

The oil light comes on when there is no pressure. There is no pressure when the pump either cannot get oil to pump or has oil and will not pump it.

Get it checked before you do anything else. A engine running with no pressure is a cooked engine.

Take it to a reputable independent repair shop that isn't a chain...that employees Master L-1 Technicians. Chain stores can barely change oil, let alone diagnose complicated issues.

Check for the injection
Hi octane gas and fuel injection cleaner
go for a ride.

sounds more like one of your cam position sensors has failed

We are having the same problem. We are right now changing the crankshaft position sensor along with the intake and manifold gaskets.

The fuel pump died out .
Replace the fuel pump , sometime they give no warning .

Good Luck

If it's the water pump there should be water leaking, if it's the steering pump the noise  would change as you turn the steering wheel left to right. If it's constant, it could be just old belt and bad idler and tension pully. Start buy praying a little water to the belt while the engine is running and if the noise goes away, the belt is in time to be chaged. If the noise is still there, then most likly it's the ilder bering or tension bearing. Good luck