I spent months chasing a "gremlin" in my 2014 M235i's DME before finally deciding to send it to The ECU Pro. Beginning with testing, their Team was able to replicate the trouble code I was receiving. Once identified, they attempted physical repairs to the circuitry, as well as software patches to defeat my "gremlin". Unfortunately, my DME was not able to be repaired. While this was a disappointing result, it certainly saved me time and frustration from further attempts to fix it myself. I ultimately had to purchase a cloned, replacement DME, which is (so far) working flawlessly. I highly recommend The ECU Pro to DIY'ers and weekend mechanics like myself. I'm awarding 4 stars out of 5 due to communication issues that occurred during my DME's service. I believe The ECU Pro was experiencing email server issues so there were longer than desired periods when I did not receive any status updates. Once The ECU Pro realized that this was a problem, my Service Rep contacted me using their personal email, which was very appreciated. They also went out of their way to quickly complete my project once the communication issues were resolved.