I found the same with my Volvo. The adaptor mechanism is too tight, so the cassette player thinks the tape is binding, and spits it out. Nothing wrong with the cassette player. I stripped my adaptor and lubricated everything with silicone spray, then assembled it loosely. It worked for a few weeks, then started to bind again. I gave up on the iPod and went back to playing CDs (at least I had that option).