After someowners spotted text referring to an "Acceleration Boost" upgrade when poring over their cars' profiles, Tesla has made the update available, but not for free. That's correct, this is not a free update. Instead, Tesla charges $2,000 to unlock the quicker acceleration.
This new upgrade will be only for Model 3 vehicles with the dual-motor configuration. It shaves half a second off the 0-60 mph time, according to Tesla. Right now, the Model 3 with dual motors will dispatch the run in 4.4 seconds; the update takes the time down to 3.9 seconds.
Tesla did not respond to a request for comment on the update, but owners took to Reddit to share their experiences after downloading the update. "No regrets, took it for a short drive and yes it's a noticeable difference!" posted user DopeWeasel.
Back to the results: Owners posted screenshots showing the car was capable of running from 0-60 mph in 3.67 seconds in dry, warm weather. In colder temperatures and rain, the update still produced a 3.73 0-60 mph time. Both results are lower figures than what Tesla quotes, but also include a one-foot rollout. In this measurement, the timer doesn't start until the front wheel is all the way past the starting point.
Originally published Dec. 18.
Update, Dec. 19: Adds information from the Acceleration Boost update that is now live.