From a previous thread....
"Dinan does not "automatically void factory warranty". If a Dinan accessory/tune is proven to have caused a failure or other issue, and BMW denies warranty repair for that issue, Dinan will cover it. Your entire factory warranty is NOT "voided". The Dinan warranty is a "parallel" warranty that covers a denied factory warranty claim attributed to the installation of Dinan equipment."
I'm sure this depends on your dealer and the service tech/manager you work with as well and I wouldn't be surprised if some were easier to work with than others
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Archie
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