Now that I fixed every snag on the 4.4. I'm going to keep it.
Coolant transfer pipe, valve stem seals, cooling system ectomy,
transmission solenoids, all new gaskets and seals. It's a brand new X5 now.
It should easily go another 100K without any problems.

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2003 4.6is X5
2003 525it
2003 E53 X5 Standard shift