There's an E-box fan?

[Jon K]

Where? Bentley says there is an E-Box fan, 2", but I don't see one...

[winfred]

only some cars have the fan, theres a place for it in all of them it's just not installed

[shogun]

I have one in the E32 750, sits behind the glovebox compartment. If you follow the plastic chute from the IHKA to the e-box, you'll find it. Sits behind the carpet in a black plastic box. Can be disassembled from the cabin when it starts singing/chirping like a bird.
Costs around 50 $ and looks like a fan for a PC.

[Russell]

Which cars?
Not sure mine has one. If so where is it located?

[Martin in Bellevue]

My 535, build Nov '88 has the fan.

[Jon K]

Is the fan an inlet or exhaust - does it suck into the ebox or exhaust out of the ebox?

[Martin in Bellevue]

Is the fan an inlet or exhaust - does it suck into the ebox or exhaust out of the ebox?

I think it blows cabin air into the ebox.
Jeff's 90? 535 doesn't have the fan.

[shogun]

Is the fan an inlet or exhaust - does it suck into the ebox or exhaust out of the ebox?

That is clear, it blows cold air from the aircon into the box. Has 2 speeds and in the e-box is a temperature feeler. Always blows, 2nd stage at 44 degree celsius.
http://www.realoem.com/bmw/showparts...51&hg=12&fg=35

Part 12901720343 (BLOWER UNIT) was found on the following vehicles:


E31: Details on E31
E31 840Ci COUPE
E31 840i COUPE
E31 850Ci COUPE
E31 850CSi COUPE


E32: Details on E32
E32 735i SEDAN
E32 735iL SEDAN
E32 750iL SEDAN
E32 740i SEDAN
E32 740iL SEDAN


E34: Details on E34
E34 525i SEDAN
E34 535i SEDAN
E34 525i TOURING
E34 530i TOURING
E34 530i SEDAN
E34 540i SEDAN
E34 M5 3.6 SEDAN

[Jon K]

Wow that is interesting Shogun - they are airconditioning the ECU box? That's going to introduce moisture without a doubt. I saw that there are "blanks" in the rubber sealing around my ECU box but I didn't know what would go there. Looks like I may throw a little 60mm fan in there for some added cooling.

[Bill R.]

air thats cooling the box. Unless you have a humidity controlled prius.

Wow that is interesting Shogun - they are airconditioning the ECU box? That's going to introduce moisture without a doubt. I saw that there are "blanks" in the rubber sealing around my ECU box but I didn't know what would go there. Looks like I may throw a little 60mm fan in there for some added cooling.