Does BMW transmission have fluid temperature sensor so you can monitor fluid temperature with diagnostic software when filling? I have filled trans fluid on Audi this way. Not sure IR heat sensor is always accurate since it is hitting the pan, not the fluid.

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2004 X5 4.4i
2001 E46 M3
1995 E34 525i
2008 Acura MDX
1984 Maserati
2011 997 Turbo