Change History

Discussion of Boxsters and other Porsches

Expect the best, and accept no substitute.	Products for your Boxster, Cayman and Carrera.

Message: If you have high mileage on the pre-cat sensors

Forum List Message List

Changed By: Boxsterra
Change Date: August 20, 2025 10:36PM

If you have high mileage on the pre-cat sensors

it might be a good idea to replace them regardless. They're not that expensive and it should increase the efficiency of the engine.

If the codes car has post-cat codes then I would move the best ones you have (they should be all interchangeable) to post-cat positions and put fresh ones in the pre-cat positions.

But that's just me. It's all about priorities.

Original Message

Author: Boxsterra
Date: August 19, 2025 03:06PM

If you have high mileage on the pre-cat sensors

it might be a good idea to replace them regardless. They're not that expensive and it should increase the efficiency of the engine.

If the codes post-cat codes then I would move the best ones you have (they should be all interchangeable) to post-cat positions and put fresh ones in the pre-cat positions.

But that's just me. It's all about priorities.