I've never had any problems with the Bailey DV30, been running it longer than any other valve I've tried, it's also louder than the Forge 007P as well. I've run the atmospheric Bailey DV26 BOV as well, again zero issues, not even a single fault code. BUT ... I know the 1.8T is supposed to run recirculated to keep the fuelling correct, and the DV30 is almost as loud as the DV26 - so I sold the DV26 and stuck with the DV30.