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Old 04-19-2020, 06:09 AM   #1
JW240
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Default Bosch QBA efan info and connector source

The good old 2 speed Bosch efan im using is worn out. Rattling and stuff.
So I took a look at suitable replacements; easy to find, powerful, preferably controlled and even brushless, compact and durable yadda yadda. And of course, cheap. Should have put cheap first in the list of requirements!

Search started with brand new Spal fans, but those were expensive and difficult to source here. Some fans only found on one model which limited the availability, no dice. Then I stumbled on this Bosch fan.
Many 'premium' cars 2005-2015 used the Bosch QBA efan. Think BMW Porsche Audi Mercedes Volvo etc. Brand new they cost a small fortune. Low mile from junkyard? Cheap!

Figured out how to trigger the efan to run and with a simple pwm signal one can control the rpm. The fan seems to be quite powerful and per datasheet pulls a maximum of 48 Ampère at 2600 rpm, flowing 0,85m3/s (which 42 bathtubs per flagpole, or 1800cfm). Nearly takes off going full gaz.

I'm gathering parts for the wiring loom for aftermarket ems and would like to buy the correct connector. Anyone know a source? Best bet probably bmw dealership? Or..? See pictures.

Ps: the volvo version I sourced needs slightly different frequency, 100hz pwm. The Audi A6 comes with the same frame pictured in the data sheet, which makes mounting it a breeze.
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File Type: jpg IMG_20200419_114016.jpg (199.8 KB, 67 views)
File Type: jpg Screenshot_20200419-115449__01.jpg (158.6 KB, 67 views)
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Old 05-03-2020, 07:41 AM   #2
OttoB
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I have efan in my plans for my 164. Have bmw fan.

Looked for connector also

Is this suitable
BMW 69005369?
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Old 05-08-2020, 01:27 PM   #3
JW240
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Quote:
Originally Posted by OttoB View Post
I have efan in my plans for my 164. Have bmw fan.

Looked for connector also

Is this suitable
BMW 69005369?
Looks good, yes! Lets see what the connector + contacts/seals costs.
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