Rear engine coolant bypass joint leak
ENGINE AND ENGINE COOLING
6 NHTSA complaints · 2024-07 → 2026-05
“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…”
“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…”
“I was idling in line for food when I noticed my thermostat gauge going slightly higher in temp. All of a sudden I hear a loud hissing sound and smoke coming off of the engine as well as a chemical burn smell. I pulled over to the side in fear that a fire could potentially start…”
“2021 Toyota Tacoma OR coolant bypass joint leaks at only 47800 miles. The cost of repair is $1490.36”

