In this video, we diagnose the horrible knocking sound we heard on the test drive and what caused it. It's not good. You can support me on Patreon! - / m539restorations T-Shirts, hoodies & mugs - https://teespring.com/stores/m539-res... Follow me on Instagram - / m539_restorations Max, BMW parts - https://oembimmerparts.com/ Aqua (vapor) blasting cabinet - https://www.vaporblastingequipment.co... Find Liqui Moly oil and additives for your car - https://www.liqui-moly.com/en/service... BendPak lifts - https://www.bendpak.com/ Luuk, BendPak & Quickjack Europe - https://liftmotive.com/ Massive thanks to Radu from RT Design Studio for making new merch happen! - https://www.rt.md/ Email: M539restorations@gmail.com