Adaptive Cruise Control problems of the 2012 Toyota Prius

While driving 65 mph on the expressway on January 12th, 2026 under cruise control, I tapped my brakes to slow down. My brake warning light came on, along with the abs warning light, and the anti-swerve warning light. Cruise control no longer worked, and my brakes were noticeably hard to apply. I immediately had the vehicle computer checked and the issue is a leaking brake booster component, a faulty part known by Toyota to fail prematurely with this and other Prius models. No recall was issued however. The car is now unsafe to drive until a ~$4000 repair is done, according to my service representative.

Coming to a yellow light, I braked and the vehicle made a strange sound with loss of braking, so I sped up instead, having to go through a red light. Shortly after, that afternoon, when I again started the vehicle, the safety lights lit up in the dashboard and my vehicle kept making a strange cycling noise. As it turns out, it was the whole brake actuator assembly. Under great financial hardship, I had the vehicle repaired ($4300+). I applied to Toyota corporate for help but they denied it, saying I was outside the extended warranty. I’ve since learned this brake problem was a known issue, and Toyota settled a class action settlement. My vehicle has only 90,000 miles on it, and it is has been used primarily as an in-town vehicle, our only car. I’m asking for a recall and reimbursement on repair for affected vehicles. Toyota has been allowed to get away with responsibility for a known issue by putting it into a extended warranty program, now expired. Meanwhile, this dangerous, known defect continues to happen to unsuspecting drivers. I was lucky with my incident, as no cars came out when the light changed, but it could have been a different outcome.

Abs unit failure (may also be called abs control module actuator and pump assembly). Three mechanics, including a Toyota dealership, is unable to reset the system to correct. The pcs system cannot be disabled which, in turn, means cruise control is no longer operable.