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March 29, 2013 Service bulletin

On your 2012 model year Prius vehicle, the Lane-Keeping Assist (LKA) system may not activate the lane...

Toyota technical service bulletin Prius LKA Follow for 2012 Toyota Prius.

Bulletin number
Prius LKA Follow
Component
Lane departure: lane keep: steering assist
Summary
On your 2012 model year Prius vehicle, the Lane-Keeping Assist (LKA) system may not activate the lane departure warning (beep) when the vehicle begins to deviate from the marked lane. All other features of the LKA system operate as designed.

Owners of these vehicles have filed 12 complaints in the driver assistance category.

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