2021 Toyota RAV4 Prime Brakes Problems

The car has a grinding sound and a brake slipping feeling that occurs while traveling and braking over rough pavement. It does not happen consistently, but it does happen fairly regularly (every 2-4 weeks). Note, the grinding sound can range from subtle to quite loud, depending on bump/timing of braking. This has been happening since I purchased the car and continues to happen, which is why I put today's date as the incident date, and I have been bringing it up with the Toyota maintenance department at most maintenance appointments. Their shop manager has driven it and thought I was mistaking it for the ABS activating. I have driven it with him, ABS has activated, and when he pointed it out to me, I have let him know that what is happening is definitely something different than the ABS activating. I have tried to find a location to show them to replicate it with the service center, but it happens randomly on rough patches. For example, it happened on a spot near the dealership that I thought I could use to show them, but when I drove over the same area again and braked, nothing happened. So, I have not been able to replicate this with the service center, but it is most certainly happening. I have notified Toyota through their consumer contact system that this issue is going on and they said Toyota tracks issues like this. However, no resolution has been offered. Other Toyota Rav4 Prime owners of the same year have experienced this (see [XXX] and [XXX] ). Although the maintenance manager was stumped, he said at a recent visit that another Prime owner voiced the same type of thing happening. Toyota needs to investigate to determine what the issue is and remedy the issue. I am concerned this could lead to a larger issue and is a safety recall issue that warrants immediate attention. It does not seem that Toyota is taking this seriously. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

When braking and hitting a slight bump in the road or on a wet road it actually like my car is accelerating, seems to be a possible issue with the regenerative brake system and the antilock brake system software working together. Luckily i have not hit anyone, but this is a major safety flaw. Has happened multiple times.

When pulling into a parking spot at less than 5 mph the car accelerated violently and couldn't be stopped while braking. A marble or granite barrier stopped the my car preventing me from going into a shallow ravine and potential on coming traffic. There have been multiple safety recalls on the braking system on the car and each have been executed in a timely fashion. I cannot determine if warning lights went off at the time due to how quickly the issue happened

All four brake rotors are defective, the metal is pitted scored and not smooth, as it should be. This increases the braking distance. The vehicle is equipped with regenerative braking thus increasing the brake service interval. With mileage at 21600 this is not normal. Upon inspection at the dealer, it was described as normal for this type of vehicle. I pointed out several vehicle in the service area as what the rotors should appear. (I have had three Chevy Volts with similar drivetrain and never had to replace rotors or brake pads.) I will upload photos of the rotors and dealers comments.

While exiting an interstate and applying the brakes, the vehicle struck a small bump (pot-hole) in the roadway with the front passenger wheel. The car lurched forward and stopped slowing down. The brakes had disengaged on all wheels. After approximately 2 seconds, the car started braking again and I was able to regain control and stop. This momentary loss of braking ability could have caused me to rear end the vehicle in front had I not left excess room. The loss of brakes increased the braking distance required and could lead to the loss of control if the roadway is slick. I have been able to reproduce this issue. No ABS or TCS lights illuminated. No beeps or other warning messages materialized. The car is available for inspection upon request. It appears to be an issue with the regenerative brakes switching over to the mechanical brakes when the car believes there is wheel slip.

While braking there is a brief release, which I believe happens when car switches from regenerative to friction braking. It feels like I have taken my foot off the brake for a moment, but I have not. Result is car briefly stops braking, which can cause loss of control. Has happened consistently for months, less pronounced with hard vs soft braking

When the vehicle goes over a pothole (or bad road condition) while you are braking, the brakes don’t work for a second, the car feels like it is surging. I almost hit the car in front. This happens a lot. It’s the exact same problem problem with the 2010 prius.

I AM EXPERIENCING INCONSISTENT BRAKE FEEL AFTER ABS ACTUATION DURING SLOW AND STEADY APPLICATION OF THE BRAKES ON ROUGH OR SLICK ROAD SURFACES. STOPPING DISTANCES ARE INCREASED COMPARED WITH MY EXPECTATION FOR A GIVEN PEDAL FORCE. PLEASE NOTE THAT THE 2010 TOYOTA PRIUS HAD A SIMILAR ISSUE, AND A RECALL WAS ISSUED UNDER NHTSA CAMPAIGN 10V039000.