BMW F30 F32 F10 N20 Catalytic Converter 18327645666 - Used Original Parts

Diagnosis and Common Symptoms

From the workshop floor, a failing N20 catalytic converter presents a clear set of diagnostic flags. The most common trigger is the illumination of the Check Engine Light, prompted by fault code P0420 (Catalyst System Efficiency Below Threshold). In BMW's diagnostic software, this often corresponds to codes like 12BD30.

Physical symptoms are equally telling. A significant loss of engine power, especially during acceleration, points to a clogged or collapsed internal catalyst matrix, creating excessive exhaust backpressure. You may also hear a distinct rattling sound from underneath the vehicle, indicating the ceramic honeycomb has disintegrated. A persistent rotten egg (sulfur) smell from the exhaust is a final sign that the catalyst is no longer effectively converting exhaust gases.

Introduction

Restore your BMW's performance and emissions compliance with a genuine, road-tested component. This used original catalytic converter for the N20 engine has been professionally removed and rigorously inspected to ensure full functionality. It offers a direct-fit solution, allowing you to clear efficiency fault codes and pass emissions testing without the significant expense of a brand-new unit. Trust in a part that was designed by BMW, for your BMW.

Product Details

• Brand: BMW

• Model Compatibility: F30 328i, F32 428i, F10 528i (with N20 engine)

• Part Name: Exhaust Manifold with Integrated Catalytic Converter

• Condition: Genuine Used (Tested Working)

• Notes: The internal catalyst matrix has been borescope-inspected for structural integrity, ensuring no blockage or melting. All oxygen sensor bungs and mounting flanges are in excellent condition. To ensure longevity, it is critical to resolve the root cause of the original failure (e.g., misfires, oil leaks, faulty injectors) before installing this replacement.