I keep my foxwell in the driver's door pocket. When I was on a road trip last week, my car started throwing codes. Within a half an hour I had learned the codes (lean conditions) and verified my fuel trims and the operation of my airflow meter without ever leaving my seat. I would venture as far as saying nobody should own a BMW without one.

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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau