I'm considering a Dinan software upgrade when my 535i arrives next month. My question is....
If I get the Dinan software tune, can the dealer tell it's there? It seems if the dealer updates the car software, blowing away the Dinan tune, then I can go back to Dinan for a reinstall at little or no cost.
FWIW, I would be going to the Pleasanton, CA shop. If there are any pros/cons, I'd like to know.
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