Burger Tuning BMS Downpipe Check Engine Light Fix V3 [BMSDPFIX3]

The BMS Downpipe Fix eliminates timing pull, oxygen sensor miscalibration, and tuning headaches associated with high flow exhaust systems. Installs in the ECU area and is compatible with all tunes.

Now fully adjustable, this unit will fix any "Check Engine" or "Service Engine Soon" lights associated with installing catless downpipes on your N54 BMW (335i, 135i, 535i), and prevent it from running rich.