P0430 Catalytic Converter

[chedeng]

Hi, new member here. I recently acquire a 173K - 2001 BMW X5 3.0i with 5-speed MT.


Check Engine Light is ON with the dreaded P0430 Code Catalyst System Efficiency Below Threshold (Bank 2).


Here are my Questions.



1. Can the rear exhaust manifold be removed without removing the front
exhaust manifold first? The plan is to remove all nuts from top, then twist/turn the manifold down to clear. Can it be done?


2. Is Bosal replacement catalytic converter any good?

Thanks for any suggestions you can offer.