You spend $xxx on one and then have to spend more to fix the problem.
I have a Green Cotton Twister on my S3 and you can hear the Forge DV do it's thing on that. In fact it is pretty loud inside the car, if you come off the throttle quickly.
It's a good bet that the std DV died long ago, so I'd say get a replacement one anyway. They don't usually cause a fault to register.
You can test them easily.