Quote:
Originally Posted by Yetello
I checked the partnumbers for the BDC and there is no mentioning of any option codes. Like for the door switch it mention the S416A for roller blind equipped cars but for the BDC not a single code. Thats why I think they would all be correct and only needed coding because a new BDC is the last thing you want to change on the car.\
On the otherhand I retrofitted headlamp washers on my car and I only had to code the BDC to activate the Headlamp washer Pump.
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I got the parcel shelf and connector for the motor side in the mail. Was an 18 gauge and 22 gauge wire. Swapped an 18 gauge over from the BDC connector I bought and now both are 18 gauge. For future readers, the copper wire itself minus insulation should measure about 1mm in diameter using calipers. I wouldn't use thinner wire for this.
I agree with Yetello that I don't see anything regarding a relay, or different part numbers for the BDC depending on option code. If the pins are present it should just work. It could have been that other forum poster had an early model or a poverty spec g30 which did not have something in the BDC for it. It looks like the part numbers used on a 2017 525i and a 2021 m550 do not share any part numbers. They are separate lineages it seems from 2017 to 2023. I'm still going to give this a shot and worst case I'm out a few bucks and time for the switch and will have to wire it like others have done to a switch Best case it works like factory cars.