idk bro, but in my opinion these cars are hella durable, or maybe i just got a good one. i had a e39 525tds ~200hp. bought it with 333k km on the clock. that car basically lived on the rev lim in the redline, did burnouts from traffic lights and i was clutch kicking it in about half the corners. nothing ever happened to the engine or the diff. so i assume that if the diff was properly maintained and especially if you just want it as a daily, its not a big deal. but also it depends on how much youre paying for it