His car is a 2001 E46 Cabriolet with less than 90K miles and he's baffled. I post this for a friend that isn't a member here. Yes I know it was stupid that I did not check my coolant level in the beginning. Strange thing is both my E46 and the wifes X3 started having the coolant level light go off. Followed this procedure and everything is find. Coolant level sensor: AIRBAG light fix video How to reset BMW AirBag light The reason why no. I replaced my cooling system this summer and thought I bled the system correctly, but with the cooler weather the coolant level light started going on intermittently. Also there is no sighn of overheating, the needle stays in the middle as usual. the coolant levels seem to be fine, and its been less than 12 months since i had it changed. As the days progressed, the coolant light stayed on longer and longer, and this time it was periodically coming on and off even while driving. BMW e46 3 series Coolant level sensor replacement. if i turn up the heat in my car, the coolant light comes on its fine on 16 degrees which was fine in summer, but now i cant even clear my windows without this light coming on. Question 2A: What if you open the ET several days (or even two weeks) after the last drive and you hear pressure being released and the float bobbing as if full? coolant light came on, then turned off after a couple mins. Comes on at a stoplight, goes off under acceleration. Question 2: What if your coolant light intermittently comes ON/OFF with no real rhyme or reason? Comes on at 40mph, goes off at a stoplight. Question 1: How does the coolant circulate if the engine is OFF as step 5/6 would indicate? Allow the car to idle until normal operating temperature is reached. Replace the expansion tank cap and start the motor.ġ0. Replace the bleed screw and check the coolant level in the expansion tank.ĩ. Keep pouring coolant until you no longer see any air bubbles in the coolant coming out of the bleed screw hole.Ĩ. Slowly pour coolant into the expansion tank until coolant runs out of the bleed screw hole.ħ. Turn the climate control to the highest temperature and put the fan on the lowest setting.Ħ. If you do decide to replace the tank (17117573781), it will only run you around 70. Coolant level sensor and washer fluid level sensors are the same, so you can swap those to troubleshoot. Turn the ignition on but do not start the engine.ĥ. If you have an aftermarket tank, its not unheard of for the magnet inside for the level sensor to come loose. Remove the small black bleed screw from the elbow that connects to the expansion tank.Ĥ. I have a question about this procedure found on this forum for bleeding the cooling system:Ģ.
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