2021 TOYOTA RAV4 Engine Problems

While driving at highway speeds (approx. 65 MPH), the vehicle suffered a sudden and catastrophic loss of motive power. The "Hybrid System Malfunction" warning illuminated, followed immediately by a "Check Engine" light. The vehicle entered a fail-safe mode, then completely shut down. The steering wheel locked, making it extremely difficult to maneuver the vehicle to the shoulder in a dark, remote area with freezing temperatures. This presented an immediate life-safety risk to all occupants. Following the incident, the vehicle was presented to two separate authorized Toyota dealerships in the US for emergency assistance. Both failed to provide the standard of care required for a high-voltage safety failure. The first dealer refused to perform even a basic safety inspection or intake the vehicle, stating they had no hybrid technicians on weekends. They turned the vehicle away without safety warnings, forcing the operation of a chemically failing vehicle on public roads. The second dealer attempted to charge a diagnostic fee. However, when questioned, they admitted they also did not have a hybrid-certified technician on site. They attempted to bill for a diagnostic service they knowingly could not perform. This fraudulent charge was only rescinded after it was challenged. They subsequently refused further assistance, leaving the occupants stranded. The vehicle was eventually towed to a third dealer (in Canada) where it was diagnosed with severe corrosion of the High-Voltage Floor Under Wire Harness (MGR Cable), a known defect. The dealer confirmed the rear motor cable was corroded and required replacement. The repair involved replacing the cable and installing a "splash guard" cap. No prior warning signs occurred before the sudden highway shutdown. This failure is a result of the manufacturer's failure to adequately seal high-voltage components against corrosion and the dealer network's gross negligence in refusing emergency safety support.

The contact owns a 2021 Toyota Rav4. The contact stated that while her daughter was dropping her off, the daughter shifted to park(P), and the vehicle made an abnormal static sound. The contact stated that the failure recurred upon shifting to drive(D). There was no warning light illuminated. Additionally, the contact stated that there was an abnormal sound coming from the engine. An independent auto electrician was contacted and informed the contact that the abnormal sounds could be related to an engine failure; however, the vehicle was not diagnosed or repaired. The vehicle was taken to the dealer, where the contact was informed that no failure was found. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 67,314.

Mileage: 67,314

I have a carbon monoxide leak going on since I bought this vehicle. I have been complaining about noises I have been hearing from the drive train and got a diagnosis from the same dealer with well over 1k worth of work. This has caused me a lot of lost money since I have been from dr to dr and back and forth with the dealership and now I tested for carbon monoxide and it’s leaking into my vehicle the dealer keeps telling me it’s fine it need a tune up or evap system clean. I am not able to drive this car safely and I have permanent brain damages from the carbon monoxide gas

The vehicle has never been in an accident and has been garage kept. There were 5 pinholes in the radiator that were slowly dripping over time. My radiator fluid went so low my car overheated and had to be taken in for repair. No warning until there was no radiator fluid left and overheated and had to pull over on the highway. Radiator was cracked in 5 places. 4 year old car, less than 55,000 miles. Confirmed and repaired by an independent service center.

Coolant bypass valve problem with several rav4s. My car is unusable and I need it to work.

While parked in a commercial lot on [XXX] around [XXX], I noticed smoke coming from the front of the vehicle while sitting inside. There was a strong burning rubber smell. I exited and saw flames coming from beneath the front left bumper, directly under the fog light area. I had arrived at the location about 30 minutes earlier. I opened the hood from inside the vehicle, stepped back, and called 911. The fire rapidly engulfed the front of the vehicle. Firefighters arrived within 10 minutes and extinguished the fire. Police responded and created a report. Three nearby vehicles also sustained fire damage. The vehicle had previous front-end repairs (driver side bumper and fog light) and was well maintained. The vehicle had not shown any warning lights or messages prior to the fire. I believe the fire originated from an electrical or engine component and the vehicle is available for inspection upon request. GEICO insurance has been contacted and a claim has been opened. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

"What component or system failed or malfunctioned, and is it available for inspection upon request?" Coolant bypass valve is malfunctioning. "How was your safety or the safety of others put at risk?" unknown "Has the problem been reproduced or confirmed by a dealer or independent service center?" Service manager at Tuscaloosa Toyota confirmed problem without even inspecting the vehicle. He told me I am not the only Toyota customer experiencing this problem. "Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others?" Vehicle nor component has been inspected by manufacturer. "Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?" Warning alert that reads 'engine maintenance required' has been appearing on the vehicle's dashboard for over a year now.

Steering power low message appears and engine completely stops.

Pop up of "Engine Maintenance Required" , ran the diagnostic steps and confirmed it is due to coolant bypass leak.

Coolant Bypass Valve The problem has been confirmed by the dealer Warning: Engine Maintenance Required

While turning slowly, right tun, into a parking space, the vehicle lunged forward at a much higher speed than anticipated. The vehicle jumped the sidewalk, went up an embankment, about 20 degrees, and about 25 feet until it stopped on its own. Happened on April 14th, 2025, about 11:30 am. Driver was is good health, no medical conditions. Driver also has a clean driving record, no infarctions. The vehicle jumped a curb 4 inches high, ran over some light brush, but luckily no damage to vehicle. There are train tracks about 15 feet away, which could have been another incident. Driver says when she slowly pulled into the spot, the car lunged forward, with good thrust, and I am a witness to this incident.

Several malfunction warnings (pre-collision system malfunction, AWD malfunction, engine malfunction, parking brake malfunction) as well as several warning lights appeared on my dash. Took vehicle to a Toyota dealership for repairs. Fuel pump was replaced. Drove car a few days later and all the same warnings and lights came back on and this time the vehicle stalled in the middle of the road while driving. Was able to restart but had as soon as vehicle was stopped it would stall. Had to restart the vehicle several times while driving 2 miles just to get it home.

Keep getting an service engine maintenance message/ check engine light. No codes show up, most likely the coolant bypass valve everyone is having an issue with. Don't receive message when ac is off. Or when blasting heat. Reset and comes back. Needs to be a recall. I see there is a class action lawsuit pending.

Started seeing the message on the dashboard that says “engine maintenance required visit your dealer” when I took it to get it checked out they said it was the coolant bypass valve, the worker at the Toyota dealership mentioned that it has been happening to other vehicles as well, so he knew exactly what the message meant. Upon doing my own research I found many others with the same issue on their RAV4’s as well. This issue is not covered by their warranty

I own a 2021 RAV4 which I routinely get serviced at the Passport Toyota. On June 29, I took my car to Passport Toyota for service because the maintenance required message appeared on my car’s dashboard. The service advisor texted me a list of recommended services for my RAV4. One of recommended services was to replace the coolant bypass valve. I agreed to the service at $800. On July 3rd the check engine light came on and the car begin to overheat. I was 2 miles away and immediately drove there to inform them of the issue. They checked my car in for service, and explained to me that a hose must have come loose and was the cause of a coolant leak. When I received my vehicle, the check engine light was off, and the car seemed to be in working condition. On July 23 the maintenance required message returned. Again, I immediately drove my vehicle to the dealership and checked it into the service department. My service advisor notified me that they needed to reset the maintenance required message, and it would go away. I received my car back and the maintenance required message was no longer there and seemed to be in working conditioned. The next morning, July 24 while driving to an appointment, my car started to overheat and the check engine light came on again. This time the car was smoking. I was less than 5 miles from the dealership so I took it back to the them and checked it in for service. After having my car in for service for one week, they called me and stated that the issue was related to me having blown a head gasket, and I would need a new engine. The service department continued to do test as required by Toyota to determine the cost of a engine and how much they would cover. Three weeks later, they told me that Toyota will pay half the cost and I have to pay $3200 out of pocket with only about year warranty. I brought my car in several times and clearly mistakes and misdiagnosis were made on their part which led to the destruction of my vehicle.

We’ve had the car for three months had it to the shop of the Toyota place seven times for the electrical issue the car will shut off going down the road when you give a gas when you let off the gas, it will start back up spitting sputter, the instrument cluster The gauges will stick in one spot and not budge and you lose all power to the vehicle to drive

A warning message came up that the HYBRID SYSTEM MALFUNCTION contact dealer. This was confirmed by the dealer. According to the dealer and message boards at various web sites, the Hybrid System Malfunction is NOT uncommon. To fix the problem, a wire harness must be replaced with a replacement cost of $2000-$4000. When I asked what changes have been made to the replacement part to address the corrosion problem, the response was there might be a new coating but we do live in New Hampshire.

Engine maintenance light came on saying to go to dealer at 35,000 miles. The coolant bypass valve needs to be replaced in order to prevent the engine from overheating. Our repair shop coordinated with the dealership who admitted that they commonly see this issue on RAV4 and Corolla models, though there is no recall currently in place.

I received an error message “Engine stopped, steering power low” after driving an hour in the rain, sat in my car for about 20 mins with wipers on, engine began to jerk aggressively then shut off. I could not gas it or move the car. I let the car sit after being towed, it ran fine as if nothing happened. I got a battery test and it was at 100% charge according to Autozone. The check engine light, battery light and steering light came on. No prior indications of this problem.

Coolant Bypass Valve failed.

I had my 2021 RAV4 Hybrid in for a routine oil change at 59,150 miles. I have maintained this vehicle in accordance with Toyota's recommendations since purchasing it brand new. During their inspection, it was noted by the Toyota mechanic that the timing cover was already seeping, way before it ever should be for this age and mileage of vehicle. The dealership mechanic did not recommend anything be done at this time since it wasn't an "active leak", even though seepage will turn into a leak. They denied my request for them to inspect the gaskets and look for cracks in the timing cover while my vehicle is still covered under warranty. While they would not say why they refused to honor my request, I assume it is because my warranty is set to expire when my vehicle reaches 60,000 miles (only 850 more miles from then) and they want me to have to pay $3500 of my own money instead of theirs after my warranty expires. It is unsafe for me to continue to drive this vehicle due to the fact that a timing cover leak can be a serious issue for my vehicle. The timing cover helps protect the timing belt, which is crucial for the proper operation of the engine. If the gasket is leaking, it can lead to oil loss, potential engine damage, and even engine failure if not addressed promptly. There were not any warning lamps that indicated to me that there was an issue.

The engine block cracked and started leaking coolant. It is clearly a defective manufacturing of the block casting. The same engine was recalled several months before mine, but my manufacturing date fell just outside of the range they recalled in the same year. The problem was confirmed by Price Leblanc Toyota in Baton Rouge, LA, a new short block was installed and I was left footing the bill because Toyota Corp denies responsibility for it even though it is only 3 years old and has had ALL maintenance done through the dealerships. The initial coolant leak was first noticed on 10/17/2023. The vehicle repairs were completed by Price Leblanc Toyota and picked up on 12/13/2023.

When driving the car and stopping at a stop sign or stop light, the engine will shut off. The automatic restart occurs and with the headlights on the climate temp control display flickers While all the other dashlights remain bright. Many people are disabling the system. Since there is a switch you can press, defeating the system. Toyota sent a technical specialist who inspected the system. And since he couldn't find how to fix it, declared it normal. Apparently toyota designed the car to do this for some unknown reason. He stated That lights will dim when the car restarts. It is not dimming as if a current draw, it flickers every time. This of course, affects the fuel economy of the car, defeating the system, which many people do and creates a concern of why that one component flickers. Toyota installs a heavy 605A battery to operate this system Since there are so many restarts. Will this create a car fire at some point? I would imagine That it makes a difference in The cafe reporting since so many people Disable the system.

Coolant Engine Bypass Valve Faulty. Dealership says it’s a known problem and they replaced 12 this week on RAV4 all different mileages

The contact rented a 2021 Toyota Rav4. The contact stated that while driving at an undisclosed speed, he heard a vibrating sound coming from the front driver’s side windshield. The vehicle was taken to an independent mechanic; however, the contact was informed that the vehicle was a rental and could not be diagnosed. The contact was informed to return the vehicle to Avis Car Rental. The contact stated that on a separate occasion, while driving at an undisclosed speed, the vehicle lost motive power and stalled. The contact stated that he was able to restart the vehicle after several minutes. The contact stated that due to the loss of motive power, the front driver’s and passenger’s side headlights failed to operate as needed. The vehicle was taken to the dealer however, the contact was informed that the vehicle could not be diagnosed since the vehicle was a rental. The vehicle was not diagnosed or repaired. The manufacture was not notified of the failure. The failure mileage was approximately 53,000.

Mileage: 53,000

The hybrid system stopped working thus AWD, automatic emergency brake and other components stopped working as well. Message Hybrid System malfuction output power reduce visit your dealer AWD System malfuction 2wd mode engage visit dealer Engine light turn on

We were on a drive back from Nashville like normal. My mom had picked me up from work at around 07:15. The car started making strange sounds as we were driving down the highway. It started yelling at us to pull over to a safe spot and slowing down. All of the lights had come on flashing at this time. It didn’t even make it to the shoulder; We made a stop on the triangle area for when cars come in from the exit. As soon as we stopped, smoke started engulfing us and 2 guys who saw this happening parked on the shoulder and came running out of their van with fire extinguishers and started telling us to get out. When we went around the car to check what was going on, we noticed the fire that had started from the bottom of it. They fired the extinguishers a couple of times to the bottom of it where we could see the fire but it didn’t help much so we had to retreat to a safer spot. We called 911 to ask them to send assistance. Not long after, the front half of the car was engulfed in flames. 10-20 minutes later, the fire department came to extinguish the flames. Once they got the fire under control, they towed the car to the shoulder of the road where we proceeded to salvage anything that was salvagable from the car. Where I got my hands cut up from broken shards that were littered all over the interior. We waited for awhile for another form of transportation to be able to make it home and it took a little bit due to the traffic that this incident had caused. We got the car towed back to Toyota for evaluation of the incident. It was supposed to be done within 2 months, but we still hadn’t heard anything about it going into 3. We called them to inquire about the car and the situation, and they said that they had closed the case and had to reopen it for further investigations. They had closed the case and not told us anything about it. We received an email on the 23rd of January that stated the vehicle was too far damaged for them to be able to evaluate anything.

I was pulling into a parking space with my foot on the brake, had just touched the parking bar, and the engine started racing. The car went forward over the parking bar before I cold stop it by stomping on the brake. The only thing stopping me from going over the side of the hill was a chain link fence. Luckily the brakes worked. This is a 2021 RAV4 and I have never had this problem before. I am scheduled to go into the Toyota dealer to have them look at it.

Since I bought my brand-new car 1. the engine has stopped 5 times. 2. My windshield cracked. 3. There is low tire air pressure indicator that appears once in a while. A new battery was replaced, and it now cannot start. The message on the screen indicates: "IGNITION ON, Voltage abnormality steering power Low. Visit your Dealer." I took it the Dealer and now they are not able to find out what the problem is because I had to jam started the car for it to be towed.

2021 Toyota REV4 with just over 5,000 miles. I got off from a parking lot and drove 1/2 miles, The screen shown "Vehicle Alert" and asked to check engine with message "A malfunction in the electronic control of the engine, throttle, or automatic transmission has been detected". I smell very strong gasoline, then stop the vehicle. I check the gas tank, it's normal. I opened the hood and saw a puddle of gasoline on engine part, between the battery and the engine but lower than the battery. It's so dangerous to drive with leaking gasoline so I park my car on a street

Vehicle stumbles on moderate acceleration from slow speed, hesitates shifting also. Problem has persisted since new. Dealers rep "they're all like that. can't find any problem. No warning lamps. I think there is a TSB but it seems well hidden. I feel it is a safety issue - acceleration from low speed compromised. We have 2 more 2021 rav4s in the family that do not do that. I believe Toyota knows about this problem. Also had a problem with vehicle slamming violently into lower gear when coming to a stop. Dealer could not find problem. I checked vehicle and found air filter housing not properly secured. I latched it properly and that seemed to solve slamming into lower gear problem. Dealers mechanic (?) must have not latched it properly after 12 month service. No telling how much dirt was sucked into engine while that was happening. The stumbling/ drivability hesitant shifting problem persists. Several people have reported this problem. One was fixed by a dealer attending to a software problem. This is a known problem that is being ignored. This has happened since new Jan 29, 2021.

The contact stated that the owner of a 2021 Toyota Rav4 was driving approximately 35 mph when the odor of burning rubber was present inside the cabin of the vehicle. After stopping and exiting the vehicle flames were present coming from the engine compartment. The fire department was called to the scene and extinguished the flames. The vehicle was destroyed during the incident. A fire report was taken at the scene and the vehicle was towed away. The cause of the failure was not determined. The manufacturer and local dealer were not notified. The contact indicated that the vehicle had recently been repaired after a front-end crash had occurred. The contact also references an NHTSA open investigation(PE21005) for the same failure that had occurred. The failure mileage was 30,000

Mileage: 30,000

THE CONTACT OWNS A 2021 TOYOTA RAV4. THE CONTACT STATED WHILE THE VEHICLE WAS STATIONARY, THERE WAS AN ABNORMALLY LOUD GRINDING SOUND COMING FROM THE ENGINE. THE CONTACT STATED THERE WAS NO WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO CABE TOYOTA (2849 LONG BEACH BLVD, LONG BEACH, CA 90806, (562) 595-7411) WHERE IT WAS DIAGNOSED WITH NOTHING NEEDING TO BE REPLACED. THE CONTACT STATED THAT THE DEALER REPLACED THE BATTERY HOWEVER, THE FAILURE PERSISTED. THE CONTACT RELATED THE FAILURE TO AN UNKNOWN RECALL. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE CONTACT WAS INFORMED THAT THE VIN WAS NOT UNDER RECALL. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000.

Mileage: 1,000