2011 Toyota Prius Forward collision avoidance Problems
- Complaints
- 5about this part
- Share
- 1%of 522 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the forward collision avoidance of the 2011 Toyota Prius, 1% of the 522 complaints for this model year.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“2011 Prius. 80k miles. Brake booster buzz coming on every 15 seconds now. ABs, traction and brake lights on. I’ve heard of many Prius owners with the same issue. I also have another Prius with the same issue at 120k miles. Brake booster accumulator codes popping up with 80k miles. It is a safety concern as the abs brakes don’t work. Almost every Prius is effected by this.”
NHTSA complaint #11736723, filed 2026-05“Our trac abs and brake lights came on and braking became more difficult but not totally gone. I took it to my mechanic (not Toyota dealer) and he said the codes were going off for the abs hydraulic system and it would be $3000 to fix! This is unacceptable. I feel like my safety is affected but no one else has been hurt YET. I’m trying to be proactive. they first appeared last month. No manufacturer, insurance agent or cop has inspected it. It can be inspected by appt. Please help”
NHTSA complaint #11659010, filed 2025-05“Three lights appeared on the dashboard…code C1391. This has affected the braking system, and the traction control…and the brakes no longer regenerate the battery. The mechanic said “YOU MUST NOT DRIVE THIS CAR” until a $2,700 repair is made. There was, apparently, a service bulletin sent out in 2019, and was then extended until 2022…which we did not receive, although we’ve been at the same address since we bought the car. But our car did not develop this common issue until now…2023, and Toyota says it was not a safety recall, so they don’t need to fix it, or help us get it fixed. …”
NHTSA complaint #11524788, filed 2023-06“Brake warning came on and wouldn’t go off. Followed by continuous beeping and now the brakes are no longer working properly. You have to force the brake all the way to the ground to even come to a rolling stop. The problem first occurred on 3/8/25. The brake actuator seems to be a reoccurring problem that Toyota addressed but is no longer fixing. It is dangerous to drive my vehicle and others have said their brakes have completely failed when this problem arose.”
NHTSA complaint #11647696, filed 2025-03Related service bulletins
- 10203533Oct 4, 2021TSB: For proper calibration of the millimeter wave radar sensor, the vehicle and radar target must be on a level surface with a consistent plane. If a level surface with a…
Forward collision avoidance: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 19% |
| 2023 | 1 | 5% |
| 2021 | 1 | 17% |
| 2020 | 1 | 7% |
| 2019 | 4 | 13% |
| 2018 | 1 | 3% |
| 2017 | 1 | 1% |
| 2016 | 2 | 1% |
| 2015 | 7 | 4% |
| 2014 | 6 | 3% |
| 2013 | 12 | 3% |
| 2012 | 3 | 1% |
| 2011 | 5 | 1% |
| 2010 | 18 | 1% |
| 2009 | 5 | 1% |
| 2008 | 3 | 0% |
| 2007 | 1 | 0% |
| 2006 | 1 | 0% |
| 2004 | 1 | 0% |
Other parts of the 2011 Toyota Prius
278 complaintsElectrical system
68 complaintsExterior lighting
48 complaintsEngine
47 complaintsAir bags
46 complaintsOther or unknown
30 complaintsVehicle speed control
28 complaintsTransmission and drivetrain
18 complaintsElectronic stability control
16 complaintsVisibility (wipers, defrost, mirrors)
13 complaintsFuel system
11 complaintsHybrid propulsion system
10 complaints
← All problems reported for the 2011 Toyota Prius
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology