I have a E46 (1998) 328i and I'm pretty sure its the same engine. Anyway the thermostat on my engine is located behind the viscous fan and approx 9inches above the center of the fan. The viscous fan drives the water pump and the thermostat housing is just above the water pump at the front of the engine. The thermostat is a one piece unit and is a bit expensive £55 at dealers £42 independent. You will need to remove the viscous fan to get at it there are special spanners for this and its a 30mm socket left hand thread ( screws off clockwise). I had to put a steel chisel on one corner and give it a sharp smack to loosen off. Be patient it took me an hour to get the dam thing off. You will also need to remove the plastic shroud surrounding the fan. I suggest you take digital photos as you go along as back up reference and keep all fixings.
good luck
IN BETWEEN THE TIRE AND THE RIM
The primary cause for a 2000 BMW 528i to run hot is a defective thermostat. A stuck thermostat will prevent coolant from flowing and can lead to overheating.
I would like to know, where the ac blower is located on a 1999 BMW 528i
can u show me where the brake fluid resevior on a 1998 bmw 528i is located
It is in the trunk.
removing the thermostat on a 1997 BMW 528i series will be simple. First the fan will need to be taken off, then the cowl covering will need to be removed. After these parts are removed, the thermostat is in plain view. The hoses on the thermostat do not need to be removed on this car. The thermostat will removed by taking the two bolts off.
There are a few things that could be causing your 200 BMW 528i to overheat. You may not have the correct mixture of coolant in the vehicle. The problem could also be your thermostat. Have the thermostat checked out to ensure that it is working as it should.
The air conditioner blower motor is located on the firewall in the engine compartment in 2000 BMW 528i.
The thermostat on a BMW 525I is located into the water pomp in the thermostat housing.
in the trunk, driver side.
in glow compartment
On a 97 528i the speed sensor is located on the transmission tail shaft housing at the top.