Originally Posted by wpoll (Post 1138397)

Should work by the looks of it. So long as it contacts both the pins it is wrapped around properly, it will work fine. Pin 2 ties to pin 20, at least in all the images I've seen. Presumably the factory fitted cap connects pin 17 to either pin or pin 20 (not sure which) but it doesn't matter - the suggestion is that a jumper from pin 2 to pin 20 will allow for full ODB access on the 16-pin connector (when the 20-pin cap is in place).

Not sure this wil sort your emission testing issues but as I said, what's to loose?

Originally Posted by cuban_bmwx5 (Post 1138454)

now how will i know if its working or not? i have one of those laptops for scanning the car but i dont know how to use it i could never get it to work

Originally Posted by wpoll (Post 1138466)

Did you previously try the laptop on the 16-pin OBD port? Maybe it will work now.

Unless you have some device that can scan the car, you can't really test the ports functions.

A cheap way to do this is to use a small Bluetooth or Wi-Fi ODB adapter and an app on your smart phone. BT for 'droid, Wi-Fi for iOS. I have the INPA/PASoft etc. laptop but I keep a small BT adapter in the glove box for emergencies away from home.

https://images.kogan.com/image/fetch...TELM327A_2.jpg

Originally Posted by andrewwynn (Post 1138523)

16-pin won't work if 20-pin doesn't.

Sounds like a broken wire before the 20 pin connector.

Find the broken wire or fuse and I'm betting both 20 pin and 16 pin come back to life

Originally Posted by wpoll (Post 1138485)

Hmmm. Hard to know what to suggest next. You have a car with an unknown diagnostic system and a diagnostic system that has never talked to your car. Could be one problem, could be two (or more).

The only way to isolate where the issue lies is to have at least one known-good car or diagnostic system and proceed from there. Prove that either the car is faulty (although BMW say it's not) or that the diagnostics system isn't working.