Quote:
Originally Posted by dzhou102684
Here comes an age old debate, for those of you that has done a JB4 or MHD tune. Any issues with the warranty or does your dealership just say that the warranty or extended warranty is voided
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I consulted a former BMW service tech and he advised me to go the JB4 route and have fun with the car. He mentioned to remove the JB4 before service appointments to avoid any issues.