IBR circuit board removal. Was getting codes U0129, U16A4, U16A5 on my 2011 260is. Checked connectors, fuses, hi and low can buss continuity and no luck. Pulled IBR actuator, the motor is fine but circuit board showed signs of water intrusion. Wanted to remove circuit board for inspection and repair but couldn’t determined how to get it out without breaking. Made the call to go with a new IBR unit so decided to do a destructive dismantling and post pics so maybe someone else MIGHT be able to get theirs apart with out damage.
It looks like desoldering the four 12 volt power pins, nine can buss pins, and two others if you have the water tremp sensor that are all circled in red on the attached picture would let the boards to come out without breaking by allowing the pins to remain with the case. I went with the nuclear option and cut it all apart with a Dremel but had I known more about how it was assembled may it could have come out in-tacked. The Dremel cut off wheel wasn’t large enough to cut through all of the 9 pins on the buss connector and the three that were left pulled through the silicon easily so maybe they wouldn’t all have to be desoldered.
It looks like desoldering the four 12 volt power pins, nine can buss pins, and two others if you have the water tremp sensor that are all circled in red on the attached picture would let the boards to come out without breaking by allowing the pins to remain with the case. I went with the nuclear option and cut it all apart with a Dremel but had I known more about how it was assembled may it could have come out in-tacked. The Dremel cut off wheel wasn’t large enough to cut through all of the 9 pins on the buss connector and the three that were left pulled through the silicon easily so maybe they wouldn’t all have to be desoldered.
