We have a 1995 BMW 525i. I need to replace some

There's trapped air in the cooling system.

• You need to remove the bleeder screw on top of the radiator when adding water to the expansion tank.
• With the engine running, pour water into the expansion tank till you see air go out through the bleeder screw's hole.
• Just keep adding water until no more air bubbles come out then just put the screw back in place.
• Then fill the expansion tank to it's normal level/line.

Does the blower motor work? YOU HAVE GOOD AIRFLOW THEN?

check the fuse for your blower problem if not the fuse could be a conection on the unit or the blower unit has died. as for the lack of heat this could be cos of the blower or fan motor as i call it not working but could also be your thermostat stuck open or a air lock in the water system

sounds like its turning over but not firring.
I had this problem with my 1992 525i and it was the fuse for the fuel pump. there was no fuel pressure. i have another one and it had the same problem but it was the fuel pressure regulator had failed. this is situated on the fuel rail and has a vacume line attached to it. good luck.

Hi, Sounds like you have tried about everything. Ok the aux. coolant switch is for the electric pump for the heater core will not cause an over heating condition just a longer warm up of the heater core. Has the cooling system been bleed properly if there is a trapped air pocket it will not let coolant circulate. Was the new thermostat installed correctly? They have a vent that needs to be towards the top or they trap air on the back side and cant take an accurate reading to open and close. Other areas to look at would be proper operation of the fan clutch, if they fail they can cause the fan to not lock up properly and supply enough air movement through the radiator. The aux. electric fans and their temp switches do you hear them coming on are they coming on at the right temp.

u probley need a new blower motor for your heat

could be 3 things. The fuse, the motor, or the resistor. Just because it was replaced doesn't mean it won't go bad. It went bad the 1st time. Fuse is more common. As is the resistor, oh and a 4th item...the relay.. Rare for that one to go out though.

this should be on the rear. it is fuse number 76 with a 40A rating.

ebay is the best place to try and find this.

have you checked the fuse?

getting access to the horns takes time hut check the wires going to the horn and check for voltage