It was fitted to my 2001 Miata almost a year ago. This is a brand new generator and works great! They even flow into the test results for him. The only downside is that it makes a vibrating/whistling noise at high rpm. I have adjusted the tensioner in various ways but the noise persists. It's not the worst noise in the world, I'm just thinking the bearing may have been installed or removed incorrectly. But hey the product works great and my car works great.