2001 Jetta keeps stalling (for unknown reason)

[OceanHorse]

Hi everyone. My wonderful hippie daughter (who I am proud of) loves her Jetta, but it keeps stalling at the most inconvenient times. Usually, it is while she is driving. Power steering and everything else shuts down without notice. It really freaks her out when it happens on the freeway (as you can imagine). Mechanics have tuned it up, replaced the catalytic converter and battery but no one has resolved the matter. I see this is a common thing. Has anyone seen what has resolved this matter.

Thanks to all,

Bob