【Untested.】I bought this used and it's been sitting unused ever since. After researching the part number 5201-15511, it should be compatible with N55 engines in F series 335i, 435i, AH3, and X3, X4, and X5 35i models (I'm not an expert, so apologies). I no longer need it since I've installed BM3 on my own car, so I'm selling it cheap.