i *think* that means something not related to emissions is wrong with the car. i remember hearing somewhere that the actual light that says "check engine" is only set off by problems related to the emissions control equipment. on all cars, not just e36s or bmws. correct me if im wrong plz.
Don't listen to Ivan -- he looks like Sarah Michelle Gellar. That light is your brake pad wear warning light. That means that your brake pads have worn down almost completely and will need to be replaced soon. People's estimates vary, but usually 100 to 300 miles is about as much as you want to drive on your brakes before you have them replaced -- if you don't have that done immeditely.
do you need to change the sensor everytime you change the pads??
No, unless the light went off. If you change the pads because you noticed that they were going low, you can just reuse the existing sensor. However, if the sensor has activated the light, it is not reusable.
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