how to fix secondary air pump on bmw
If you have to replace a secondary air pump we will recommend to watch this video. It might save you a few hundred dollars. Usually secondary air pump are very simple. There is a motor and a fan on top of it. We removed this one out of a BMW E90. However, almost all air pump are identical the way they are designed. Once we fixed it worked great. Some models and years might differ. Always wear eye protection and gloves when repair secondary air pump. The plastic fan on top is fragile so remove it carefully.