Motec M4 E Lambda UpgradeMoTec M4 lambda Upgrade is a software upgrade to enable Lambda It can only be added to an ecu that already has the Motec M4 Pro upgrade. You will also require a Lambda sensor. This is a software upgrade which consists of a new code which is sent to the ecu via laptop. You may purchase online, but please forward your ECU serial number. You will receive your code via email.
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