Rear O2 sensor mod for all VW / Audi vehicles from 1996 through 2007
Rear O2 sensor mod, easy bolt-on kit installs inline with the rear 02 sensor on the 02 bung to prevent the CEL due to racepipes. Off road use only. This mod is only 90% effective as variation in rear 02 sensitivity varies from car to car. No Guarantees. Tested and works well on all VW / Audi vehicles from 1996 through 2007.
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