The engine coolant bypass valve requires replacement. This could result in engine failure.

- Louisville , KY, USA

The failed item was the coolant bypass valve, message came on of " engine service required" It has been replaced by the dealer Mileage at failure 40643

- Louisville, KY, USA

2020 RAV 4 little under 34,000 miles. Coolant bypass valve needs to be replaced. -??Engine maintenance required visit your dealer-?? takes place on dash and cannot be cleared.

- Chicago, IL, USA

Air coolant bypass valve malfunction. Engine maintenance error message pops up, does not cool properly. Leaking ac fluid. Confirmed by dealership. Costs around 800 to 900 dollars to repair. Parts must be ordered ahead of time. No warning, just message showed up and will not go away. Doesn't let me see the speed I am going on the display since error message keeps popping up every minute.

- Costa Mesa, CA, USA

The problem starts with a service notice for the engine. when they check it at the dealer they say it is the coolant bypass valve and they charge 1000 dollars to fix the problem. a new car is not supposed to have these types of problems. they are making a lot of money by changing this part because there are many cars of the same year and with few miles that come to the Toyota dealer for the same problem.

- Herndon, VA, USA

I have had a Service Engine message on my dash that would return within seconds of my hitting the button to signal I received the message. When I took the vehicle to the dealership I was told it was a leaking coolant bypass valve and would need to be replaced. I was told the cost would be $215 plus three hours of labor. The final cost was $240 for the parts and $709 for the labor. The vehicle only has 31,209 miles on it. As I have researched the part, I have found numerous people have had the same issue within a similar range of mileage.

- Belle Isle, FL, USA

Engine Coolant Bypass Valve Failed expecting close to $1000 for repair. This is not a normal failing part. 2019-2023 rav4 and corollas have this faulty valve that fails prematurely. It is well documented throughout the internet and forums of people having the same issue. 3 dealerships I have spoken with list this as a well known issue that is common with the car. It throws engine maintenance required sign non stop.

- Akron, OH, USA

I bought the 2020 Rav4 XLE back in 2019 and had driven for four and half years now. I went to the dealership to get my routine oil change just this Monday July 29th 2024. As usual, the dealership did multi-inspection on my Rav4 and didn't find any problem that requires immediate attention. Two days later, a warning message popped up on the MID screen right after I started the car and read "Engine Maintenance Required". After searching online, calling both local mechanic and Toyota dealership, it happens to be a well-known issue for many 2019-2023 Toyota models including Rav4, Camry, Corolla that the faulty coolant bypass valve has to be replaced. I'm not a car person and I don't know much about cars but I have had the radiator broken while I was driving on my old car due to coolant related issue and almost got me into an accident so I know I shouldn't overlook any issues related to coolant. That being said, Toyota dealership knew about the issue, my local mechanic heard about the issue, an overwhelming number of users had reported the issue on online forums, and with no surprise, a class action lawsuit was filed regarding this issue on June 2024. For a solid car brand that advertises reliability and accountability for its vehicles, not informing or recalling for affected customers is extremely disappointing and unacceptable. After all, I had to pay $785 out of pocket for a repair that should never be done in less 5 years/45000 miles.

- Los Angeles, CA, USA

A code for the coolant bypass valve appeared through an independent service center. Warning message shows "Engine Maintenance Required", when air conditioning is turned on and does not go away. Warning message does not show when air conditioning is turned off. I had a independent service center check any damages to the coolant bypass valve, show that the part was faulty. Through various testimonials Toyota Rav4 owners, they also had the same issue. Warning message started at approximately 55,000 miles and has not gone away even after service. Quote for repair goes above $700, although part has been claimed to be faulty and not disclosed.

- Elko, NV, USA

52,000 miles, and was just informed the coolant bypass valve has failed. This is apparently an issue with ALL 2019~2022 Toyota Rav4 vehicles. It was a known issue to Toyota, using substandard parts. It results in an error message that cant be turned off, masking all other messages, and can only be fixed by a dealer for over $1,000 in costs.

- Mclean, VA, USA

The contact owns a 2020 Toyota Rav4. The contact stated while operating the vehicle, the message "Engine Maintenance Required - See Dealer" was display on the instrument panel. No warning light was illuminated. The local dealer was contacted, but the vehicle was not diagnosed or repaired due to the cost. In addition, the contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 47,000. VIN tool confirms parts not available.

- Virginia Beach, VA, USA

A warning message saying "Warning Notification A warning light was turned on. Would you like to call an operator?". Diagnostic performed by Yark Toyota confirmed coolant bypass valve malfunction which can cause overheating. Warning comes on when I turn on the A/C. I now have no air conditioning in the hottest summer I can remember. Repair costs just under $1,000 total.

- Toledo , OH, USA

Recurring engine maintenance required alert due to a Heater coolant bypass valve fail issue at 58,100.

- Orlando, FL, USA

Engine coolant valve Malfunction

- Los Angeles, CA, USA

I got a message popup saying "Engine Maintenance Required" which is different from the oil change reminder. I cleared it thinking it was about an oil change (that isn't due yet), and it came right back. I took it to a mechanic who ran diagnostics and wasn't able to find the issue. After a few internet searches, I found that the coolant bypass valve is a known issue on certain years of this vehicle. I followed the suggested steps for resetting it (to turn on the vehicle with the heater on, then lower the AC temp without hitting the lowest temperature setting). It's currently working as a fix, but I'm concerned about any long-term situations that could arise.

- Altamonte Springs, FL, USA

Premature Coolant bypass hose failure at 120k Very common according to online forums $1000 cost of repair

- Mission, WA, USA

Coolant bypass value failure. 2020 with 32751 miles. There are many of this failures reported on-line. Example: [XXX] At the dealer, the service manager relayed that a mechanic stated they've replaced several of these and it should be a recall. Cost was $520 and not covered by warranty. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Campbell, CA, USA

We replaced the original battery on May 27, 2024. A few weeks later, on June 15, 2024, an "Engine Maintenance Required" message appeared on the display screen. A local mechanic diagnosed the code and stated that the oil level was low so we added one quarter of motor oil. We also called the dealership, which stated that this code generally indicates a coolant bypass valve malfunction. We topped off the coolant fluid but the "Engine Maintenance Required" message still appeared (we were not able to clear it). A few days later, we took the vehicle to another mechanic, who informed us that the coolant bypass valve was broken and needed to be replaced. Given the 95-degree temperatures, we felt that we had no choice but to replace the broken valve because we did not want the engine to overheat. So we paid $570.28 for the mechanic to replace the coolant bypass hose and valve. The mechanic stated that this issue should not occur in any vehicle with only 38,000 miles, which means the valve was likely defective to begin with. It is suspicious that this issue occurred about two weeks after we replaced the battery and about 2,000 miles after we surpassed the factory warranty. Please investigate!

- Alexandria, VA, USA

Bypass coolant valve needed to be replaced after engine maintenance required warning came

- Suffern , NY, USA

Coolant bypass valve needs to be replaced. Car under 60k miles and should be covered on the powertrain warranty but is being required to be repaired out of pocket otherwise will ruin engine

- Austin, TX, USA