I'm sure it's intended to last to a belt change and probably much longer. With any part there will always be ones that preform as expected and there will be some that don't.
I have read here and elsewhere that the new replacement pumps do not have the collar, correct, but the control solenoid still gets plugged in... it just no longer does anything.
The VR6s are still variable, though, but they are vacuum controlled (via a solenoid nearby) not directly.
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