Does this car have a timing chain or a timing belt?

+I intend to buy a 1997 Nissan Altima, GXE 119,000 miles for 3000 USD.
This car looks good but when I brought it to an automechanic, he told
me that there is a noise in timing chain. He just took a glance and
heard the sound from the engine.

I left the lights on in the hospital parking lot. The young security
fellow hooked up his jump start battery backwards. Blew the main 100 amp
fuse and has caused other gremlins. Service engine soon light on.
Occasionally now, everything goes dead. No lights, locks, etc. Nothing.

I recently replaced the low beam head light bulb on my 2002 Nissan
Altima and I couldn't find a good picture illustrated guide online to
help me.
So I took pictures and created one.

I recently replaced the low beam head light bulb on my 2002 Nissan
Altima and I couldn't find a good picture illustrated guide online to
help me.
So I took pictures and created one.

I just installed an AEM Cold Air Intake (stillen.com) on my 2003 Nissan
Altima 2.5 automatic.
The sound is amazing (deep and throaty) and the RPMs bury when you hit the
gas. Quiet in the city within low RPMs and a screamer when you step on it.

My wife has a 2003 Altima.  The smaller of the engines that you can
choose.
Hooked up scan tool and she is getting:
P0507 Idle Control System RPM High

ignition wont unloc
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woothut
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