2009 Toyota Prius Vehicle Speed Control Problems
NHTSA component category: VEHICLE SPEED CONTROL · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How vehicle speed control ranks on this vehicle
Share of the 502 complaints citing each category; one complaint can cite several. Full breakdown on the 2009 Toyota Prius overview page.
What owners report
“I HAVE A 2009 PRIUS AND ON AT LEAST 4 OCCASIONS IN CRUISE CONTROL MY CAR HAS ACCELERATED WITHOUT MY DOING SO. ALL OF THE…”NHTSA complaint 10308885 — filed 02/12/2010
“THE UNINTENDED SPEEDING ALSO HAPPENS ON 2009 TOYOTA PRIUS WHEN DRIVING ON A BUMPY ROAD, THIS HAPPENS EVERY TIME WHEN I HIT A POT HOLE…”NHTSA complaint 10306395 — filed 02/05/2010
“I NOTICED ON MY TOYOTA PRIUS 2009 TAKES ABOUT A SECOND OR TWO TO ACTUALLY BRAKE. I NOTICED THAT EVEN WHEN I START BRAKING SLIGHTLY…”NHTSA complaint 10305377 — filed 02/04/2010
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Vehicle Speed Control complaints by year filed
Frequently asked questions
Does the 2009 Toyota Prius have vehicle speed control problems?
Vehicle Speed Control is the #3 most-reported problem area on the 2009 Toyota Prius: 67 of 502 complaints on file (13.3%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2009 Toyota Prius have in total?
502 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 64 involved a crash, 4 involved a fire, 27 reported injuries, and 2 reported deaths.
What does NHTSA's vehicle speed control category include?
NHTSA assigns each complaint to standard component categories; this page reports the VEHICLE SPEED CONTROL category exactly as NHTSA defines and records it.
