2021 Toyota Tacoma engine problems

Filed Oct 9, 2026 · Engine · NY

Engine developed a loud knock while under normal driving conditions at 61,000 miles. Oil was changed every 5k miles since new. Dealer says my oil rings on piston skirt have failed and heavy scoring on cylinder #5 Replaced short block under my aftermarket warranty. Toyota refused to cover it because I was 1k miles over factory warranty

Filed Aug 8, 2026 · Driver assistance, Engine · CA

Having two issues major issues that’s causing me a $10,000 bill. The timing cover is leaking and there is a coolant bypass hose that is leaking. I have spend a lot of maintenance on this truck on maintaining it to have to remove the engine. As for the forward collision warning ive had it go off multiple times witout a vehicle there. While in cruise control ive had it unexpectedly break on me when there was no visible vehicle infront or next to me.

Filed May 26, 2026 · Engine · CA

The plastic coolant crossover valve or pipe failed at 66,000 miles and 5 years of usage. This led to the radiator cracking. After researching online, I read about thousands of Tacoma 3rd generation users with the same issue. Also, the same issue was recalled for several other models of Toyotas but not the Tacoma.

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 Feb 27, 2025 · Engine · 50,000 miles · NV

The contact owns a 2021 Toyota Tacoma. The contact stated while the vehicle was parked at the residence, the contact raised the hood to inspect the engine and became aware that the coolant bypass valve was leaking coolant. A dealer was not contacted. The vehicle was taken to a dealer to be diagnosed and the contact was informed that the coolant bypass valve needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that the part was not under warranty. The approximate failure mileage was 50,000.

Filed Dec 3, 2024 · Engine · NV

2021 Toyota Tacoma OR coolant bypass joint leaks at only 47800 miles. The cost of repair is $1490.36

Filed Aug 30, 2024 · Engine, Fuel system · AR

This vehicle stalled while driving. It would totally shut off. Once at 75 mph no warning just shut off. Had a cylinder misfire according to dealership. On 2 other occasions it shut off while driving. On those occasions I was backing up out of a driveway and driving slow on a drive. So very slow speeds. On those 2 occasions it had engine stall codes according to dealership. I filed a lemon law claim and because it didn’t stall in the 58 miles the tech drove it Tamara Clear from gulf states determined there’s no evidence it stalls despite the local Toyota dealership having stall codes in their notes. Tamara clear also didn’t comply with Arkansas lemon law and respond within 40 days. She took longer because she’s overwhelmed with cases according to her. Each time the vehicle totally shut off while driving it had master warning lights, charging system lights, oil fluid temp lights, all of it. I took pics but Toyota didn’t care about that either Potentially fatal. And they expected me to drive around with a 6 year old in it

Filed Feb 28, 2024 · Acceleration, Electrical · WI

Driving at approximately 55 mph and dash lights started flickering, radio went off, reset to 530 (am radio). Vehicle started sputtering and slowing down in traffic and completely shut down. Lost all power and coasted to side of road. I had no or little control of vehicle. I have "connected services" that was to warn me about mechanical and electrical failures and no warning of this happening. This enrollment was to give me "services designed to help keep you safe, secure and in control of your Tacoma from almost anywhere". "brand engagement center" not concerned of the incident. Apparently two and half year old battery failed. Replaced by myself.

Filed Mar 23, 2023 · Driver assistance, Engine · AZ

My vehicle stalls (won't accelerate and rough idle) forcing you to roll off the highway without warning. This has happened multiple times while in cruise control going up steep hills. It shows engine misfire and check engine. I took it to the dealer multiple times and it was determined to be bad gas. I and my insurance company paid for this dealer (Hatch Toyota Show Low AZ) for complete clean and replacement of the entire fuel system. Now 5 months later it is doing it again. The safety issue is the stalling in the middle of the highway where there is no way to get out of the way of traffic. I made sure I bought good gas by paying extra money at a new Chevron gas station with new in ground tanks. But dealer claims bad gas again. That is a separate issue.

Filed Jan 9, 2023 · Acceleration, Engine · FL

- Engine throttle went into wide open throttle causing the Unintended acceleration in traffic - The truck was doing about 45mph the passing gear came on and a second I was doing 60mph I quickly applied full pressure on the brakes and the car did not slow down at all, the truck failed to STOP or slow down and was getting closer to the vehicle in front, it was in the Expressway. My only thought was too press the ON OFF button and instantly shut down the passing gear and slowed down. _ The vehicle was dropped of at the dealer for 2-weeks and was inspected no problem found. - There were no warning lamps messages on the screen or voice message at all. I am afraid to drive this vehicle it became a runaway wild horse. If I didn`t react in milliseconds i would of hit the car in front at a high rate of speed causing damage to everyone. I took pictures after right after having full control of the truck. All the record of my complaints of the Tacomas drive train started more than 1 1/2 years ago the records are the facts of Toyotas negligence. I have total fear and don`t trust this truck with my life. Please check the recorded dealer is Doral Toyota and you can speak with the Service manager [XXX]. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).