I think it comes down to how you feel about the risk of it failing. My 04 Tip with low miles seemed a high risk to me (at 8% failure rate), so I had the IMS Solution installed almost a year ago. Since then I have had much more enjoyment from driving the car, so to me it was worth the considerable expense. If I had a car with the dual row or later single row bearing, I probably would not have done the upgrade. And my old single row bearing was still OK, but fairly dry and did not spin freely, so I suspect it was on the way to failure.
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