Toyota Tacoma overheating problems

Filed Aug 16, 2026 · FL

My truck has experienced a major coolant leak, but it's not the radiator nor the water pump. After replacing both the radiator and water pump, the leak remains. Upon further investigation, the hose connecting to the coolant bypass housing has come completely disconnected from the housing and the male connector, which is part of the housing is completely gone. After further research, I've come across numerous posts on multiple forums of other people experiencing the same issue with the same hose disconnecting and the same part of the coolant bypass housing completely gone. Had I not caught this problem while in my driveway, the truck would have leaked all the coolant and caused major issues possibly resulting in an accident on the road.

Filed Jan 30, 2026 · Transmission · CA

Driving up the 15 freeway from Diamond bar CA to Victorville CA the car gave me a warning that the transmission is overheating and to pull over to cool it down keep in mind I was on a paved freeway with no trailer and nothing in the bed of the truck so no unusual weight so with the car being brand new (only 1500 miles) I played it safe and pulled to the side of the freeway for about 15 minutes to allow for cooling then the sign went away and it was driving normal. A few days later I took the car into the shop for transmission, hard shift issue and I had them look at the overheating as well and they found an overheating was caused from “harsh acceleration” i’ve had many cars and no car has ever had a transmission overheating light come on unless if I was on the track or off roading I went up to Victorville again the following weekend and the overheating light came on again but the dealership is saying it’s normal but going up a paid freeway and having to stop on the side of the road to let the transmission cool down is not safe

Filed Sep 30, 2025 · Electrical, Engine · 102,000 miles · CA

The contact owns a 2021 Toyota Tacoma. The contact stated that there was a coolant leak, and the coolant level in the reservoir was low. The coolant reservoir was topped off; however, the failure reoccurred. While having an oil change at Keys Toyota (5855 Van Nuys Blvd, Sherman Oaks, CA 91401); the contact was informed about the coolant leak in the rear of the engine. The contact stated that the vehicle failed to start. There were no warning lights illuminated. The contact called the local dealer, who confirmed there was no warranty coverage for the repair. The vehicle was diagnosed with a coolant leak, and the starter needed to be replaced. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 102,000.

Filed Aug 26, 2025 · Electrical · WV

Blower Fan had been cutting off. Only running intermittent on High. Took to Toyota dealer June 2025. Was told it was a Cabin Air Filter Clogged. Paid for replacement and clean out of system. Continued to not work. Called a mechanic and asked for a diagnostic. Was told it was a “known issue” with Toyota Tacomas. Had been a recall in later years. I ordered the blower motor resistor and wiring harness from Toyota parts department. It was on back order due to the issue being widespread. July 2025 parts came in. Returned truck to the shop. The techichian replaced the motor blower resistor and the new wiring harness. However, he cut the burnt wires off and spliced the new wires into old wires back to the motor. Aug 2025 motor has stopped working again. Back to the Toyota shop. The truck needs a new blower motor. The labor will be 1200. Plus the labor I’ve already paid for three other shop visits plus parts. The motor blower is on back order till mid September. The motor has been let unplugged due to “risk of fire”. But I’ve been given the vehicle again to drive. It has had a risk of fire since June. The wires have been overheating and smelling. This should have been a recall in 2011. Just as it was in the later Toyota Tacoma. Pleas investigate

Filed Jun 30, 2025 · Engine · LA

I have experienced two major failures on my 2016 Toyota Tacoma TRD Sport with less than 90,000 miles: a leaking coolant crossover pipe, which required partial engine disassembly and cost me approximately $2,500, and a leaking timing chain cover, which required a full front-end teardown and cost over $4,500. Both issues are known problems across 2016+ Tacoma models with the 3.5L V6 (2GR-FKS engine), yet Toyota has not issued a recall or warranty enhancement. These failures present safety risks related to overheating and oil loss and result in significant financial burden to owners. Toyota needs to be held accountable for these premature, design-related failures.

Filed May 24, 2025 · Engine · WA

This vehicle thermostat and sensor system are faulty! My sensor started lighting up within a year and half after purchasing. Engine was not overheating at first, they said it will eventually happen and it did; all dealers said to replace but I was out of 360000 miles due to commute to Seattle. This vehicle is less then 3 years old and should have this item listed specifically in power train warranty since connected to engine directly. If engine overheats it is no longer usable and truck is useless! Engine warranty if this is a know issue from Toyota dealerships. Contacted 3-4 dealerships in the state of WA and all had known of issue. One dealer stated anything from 2020 to current has had thermostat issues. This is serious concern knowing the engine can seize up! Their thermostat and sensor should not be a combined item in my opinion. Please advise and or confirm this is an issue that should be looked into. If the engine overheats then the vehicle could cause an accident! This is a huge safety risk that can be avoided! I work and make it from paycheck to paycheck this was very expensive to fix and had to paid out of pocket. Please help others be aware of situation!

Filed Feb 21, 2025 · Transmission · NV

1. What component or system failed or malfunctioned, and is it available for inspection upon request? The "coolant bypass hose/joint" (Part #: 16356-31051) located at the rear of the engine, connecting the two heads, failed. This part is made of plastic and is known to be a weak point in the 3.5L V6 (2GR-FKS) engine. The failed component is still in the vehicle and can be inspected upon request. 2. How was your safety or the safety of others put at risk? A coolant leak from this component can lead to engine overheating, which could cause sudden engine failure while driving, increasing the risk of an accident. Since the leak is not easily visible under the hood, a driver may not notice the issue until significant overheating occurs, potentially leaving them stranded in unsafe conditions. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, the issue was confirmed by the dealership after an inspection. They identified the coolant bypass hose/joint as the source of the leak. Many users on the forum TacomaWorld have also experienced the same issue with their vehicles. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle was inspected by the dealership, but it has not been inspected by Toyota directly, the police, or an insurance representative. 5. Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? There were no warning lamps or dashboard messages indicating a problem. The only symptom was a small puddle of coolant on the ground a week after purchasing the vehicle. Upon further inspection, a trail of coolant was observed running down onto the passenger side of the transmission bell housing. Would've costed me 1,000 dollars if didn't have warranty.

Filed Dec 30, 2024 · Engine · MI

A rear coolant leak crossover pipe rear of engine top 14 hour reapair . No warning signs just an oder local repair shop

Filed Nov 22, 2024 · Engine · RI

Rear Coolant Bypass Joint leak. Coolant leaking through this pipe and accumulating.

Filed Oct 20, 2024 · Engine · ME

Coolant leaking