As used cars surge in popularity, illegal odometer tampering is also on the rise KGO Share: SAN FRANCISCO (KGO) -- Because of the pandemic, many don't want to board mass transit or get in rideshares. New car prices are high, so many consumers are turning to used cars. Auto website iSeeCars.com says that has caused prices to increase nearly 10% from last year. Now a Carfax study finds a 13% increase in illegal odometer rollbacks. With electronic odometers widely used for 20 years, many believe odometer tampering is more difficult now or even a crime of the past. On my Facebook page one person posted, "In my grandad's day this stuff was commonly done."