I wouldn't say it is a complete fix, but a way to increase your chances of success is to buy a simpler model

When my E53 was done there was no way I was going to buy an E70. An X3 with 260 hp and a six speed manual handles and goes better than a 4.4 X5, with no transmission or electrical system worries. Ever.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue