NHTSA Complaint #11703999 — 2011 TOYOTA PRIUS

SERVICE BRAKES issue reported to NHTSA

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Complaint Details

ODI Number	11703999
Vehicle	2011 TOYOTA PRIUS
Component	SERVICE BRAKES
Date of Incident	November 25, 2025
Date Filed	December 9, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

The Master Cylinder started failing while I was driving the car, the car only has 138k miles, the dashboard lit up like a Christmas tree, all the warning lights were on, and when I went to step on the brake, I had to push it all the way to the floor for any braking to happen. I remember being scared for my life because I had almost no brakes which I could've got into a serious accident or been killed had it failed completely. I took the car to the dealer and they diagnosed it with code C139: Abnormal Leak at Accumulator Assembly, and recommended a new Brake Booster with Master Cylinder Assembly and Brake Booster Pump Assembly with Bracket. The car by age was not in Toyota's extended warranty on the parts but mileage-wise it still is, so I was footed with a $4-5k bill to replace both parts.

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