Is all previous history available when upgrading to TezLab Pro?

When upgrading to TezLab Pro or joining Founders Series, at least 30 days of historical information from prior to your 7-day free subscription window will be available.

For free accounts, data is purged on a rolling basis and the availability of information at upgrade time depends on several factors.

TezLab Pro and Founders Series include unlimited history for all vehicles on your account. The best way to ensure the continuity of data is to join as a Pro member as soon as possible upon downloading TezLab.