Man, you're making me miss ours. I've been looking at low mileage ones. If I could find someone to buy my e53 for a decent price I might take the plunge again, especially since I still have a bunch of leftover parts laying around. If your still under the emissions warranty I'd try to get the dealer to swap the secondary egr cooler. It seems to be a common enough issue, even with the recall part, the lead tech at BMW West called it immediately after seeing the codes but it was out of emissions warranty by like 2500 miles and they wouldn't even entertain helping me with it.

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Again Daily Driven SC'd 4.6iS, whats the point of having a sweet ride if you dont use it all the time.