No way to know
My understanding having just replaced mine, there is no way really to know whether your IMS is original, good or bad shape, single or double row, without pulling it . And checking for shavings in the oil filter will only tell you if it’s too late. If you have reason to believe it has been replaced with an LN Engineering IMS bearing, you can check with them. If the bearing was registered properly they can tell you. They also provide adhesive number plates with their bearing that owners apply next to the VIN plate and in door sills.
At 140k, I’d just enjoy the car until you need a clutch. Then replace the bearing.
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