Quote:
Originally Posted by BlueZ4AZ
Most likely, BMW, like any manufacturer, will figure out a way to place the blame on the aftermarket item. They'll say this was caused by that which was caused by the other thing, which was caused by your aftermarket product. Then you have the hassle of arguing against them in a no win situation.
It's a businees, so they will figure out any way possible to avoid having to pay for something under warranty.
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Maybe, but it's still subject to law and arbitration. If a wheel falls off or the windshield implodes, I doubt BMW would get off the hook.
But there are worries. With a firmware tune to the ECu, I think there are two areas of genuine concern. One is the turbos and all the stuff (waste gates, blow-outs, etc.) associated with them. I've yet to hear of an N54 turbo going bad, but if one did with a Dinan software tune, would have to guess that BMW wins that one. The second area of concern is torque limits in the drivetrain most especially the gearbox. Dinan's N54 Stage II tune in the E9X produced over 420 lb-ft of torque. The 7-speed DCT in the Z4 35i is only rated to 375 lb-ft. Dunno the rest of the drivetrain or what the MT is rated to, but if a drivetrain component blows with Dinan firmware installed, again I think BMW wins it.