2003 camry
 

I have a 2003 camry with a 2.4 l does this engine have variable valve timing, should I replace the timing chain I have 90,000 miles on it, and if I don't replace it, if it breaks does it have valve interference.

Yes on variable timing.
No the chain does not need replacing.
Yes if it break the engine will be damaged, but it does not break.