Quote:
Originally Posted by TomsM4
I had the Dinan flash and heat exchanger installed on my 2018 M4. Took it to the track a week later, and it ran great during the first session. On the second session it soon went into limp mode and the check engine light came on. Cleared the codes with a scanner, but the check engine light would not go out and it stayed in limp mode. The significant code stated "Synchronisation Process for FlexRay Failed" code CD4827. A lot of time and money wasted.
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What dealer did the flash and HE for you? How did the upgrade feel in normal driving/highway situations vs stock?