Can frequent kidney infections be a sign of renal artery stenosis?

I don't believe so : Frequent kidney infections may be related to incomplete treatment of a kidney or bladder infection, problems with urine drainage e.g.Kidney stone, tightness of the tube from the kidney to the bladder (urethral stricture), problems with the bladder which may lead to kidney infections.Renal artery stenosis is a blockage of the blood flow to the kidney. This may be assoc. W/ high blood pressure.

Not likely: The two conditions aren't really related. What is more likely is chronic or recurrent stones or some damage or scarring to the kidneys drainage system - not the arterial inflow to the kidney.