As you know, the E9X does NOT comes with a dipstick. If the sensor fail, how do you check the oil level. Other than draining the oil and measure it with a 4 litres can and fill it back, there is no other way.A dipstick can roughly show the following:-1. Oil level - low, OK or high2. Good - colour check or smell check.So E9X owner, do you trust your sensor or your dipstick?I think Astroboy is going to retrofit a dipstick into his E90 soon. :top: