I have obtained diagnostic scan for "service engine soon light indicator" results - A I R D - Secondary air injection pump - Question> what is the function and is it easy to replace?
Tom Demyan answered your question: "I have a 2000 BMW 528i with 200k miles on it, service engine soon indicatir came on however everything seems to be running great. Could this be just air cleaners replacement or similar? Would rather not go to dealer if I can eliminate myself.".
He wrote:
"Your best bet would be first to purchase an OBDii scan tool to find out what code is setting off the light. Once you have the code or codes, post back here and we can begin to fix the problem. Basic scanners run $25 to ones a couple hundred that can do everything."