I've had a recurring problem with the Air Bag warning light. I replaced the Passenger front seat belt pretentioner. Nissan has a list of things to try to fix this issue. They want to replace a seat bottom for $1300! And, they can't guarantee that will fix the problem. It seems Air Bag issues should be important. But, they don't seem to be.

Does not happen when vacuum line from egr or turbo disconnected

it's not a problem, it's just a question