Hey, I have a 2011 535i Xdrive with about 90k miles on it. whenever I cold start the car, the engine knocks. Once the car is warmed up it completely goes away. This has been going on for a little less than a year now and it's driving me crazy. Recently I have noticed that sometimes comes back at idle.
i attached a video of the sound on a cold start. Please let me know if you all have any tips for me.
https://share.icloud.com/photos/095D...sjCHXNcl55rIcA