2004 BMW 3 Series - Answered Questions & Fixed issues

On this website you find fuse box description https://www.autogenius.info/bmw-3-series-e46-1998-2006-fuse-box-diagram

You can sometimes get lucky and do a brake fluid flush / replace and the codes can be cleared. Otherwise you will need to replace the two pressure sensors on the master brake cylinder... if you pull the error codes it can tell exactly which one has failed. ( i would do both since you are already in there)...REMEMBER buy BMW OEM parts... this is a difficult repair... so put the right parts in to avoid doing it again in 6 months

You’ll have to check amp draw on the starter, it may be bad ornaolenoid has quit. All auto parts stores have a little hand held machine to check this but I’m not sure if they’ll let you borrow it to take it home, if the car can’t make it rob the store.

head gasket

If u hear the engine cranking in the AM, the batt & alt sound good. If you don't get any engine cranking in the am you may have an electrical short draining the battery. Before u convict the starter u must make sure the battery has full power in the AM. (12V) & 12 V to the starter

It could be a faulty sensor or it could be warning you of a problem the sensor is finding.

is battery dead or any thing else

take it to a gaage

dont to it ur self its lengthey and complecated

take it for a run on high way high speed, low gear to clear the emmision

engine bay on cam shaft pulley

service gear box

check battery and tap the starter motor

most likely 6

there is a adjuster on the light headunit

if not working then check fuse

behind cigrette ligher be easiest

The seat pressure sensor. if it's the seat sensor you can find a BMW Airbag Bypass, Seat Occupancy Sensor Mat Emulator on ebay, they are cheap and it works well.

Should be 17 gallons.