The big number recalls continue at Toyota, more than a year after the maker announced the first safety campaign caused by runaway vehicles. The latest action involves 650,000 of Toyota’s third-generation Prius hybrid due to a defective coolant pump that can cause the vehicles to overheat and lose power.
Nearly 60% of the Prius hybrids involved in what is officially a service action were sold in the United States, according to Toyota, which says it will cover the cost of any repairs conducted at one of its dealerships.
The maker says the problem involves an electric water pump that can slowly permit air bubbles to enter the coolant lines. As that happens water circulation slows and temperatures rise, resulting in overheating of the hybrid-electric componentry.
Initially, that should trigger a warning light, but if the problem is left unattended, the vehicle would drop into a “fail-safe” mode where power would be reduced. It is not clear from Toyota’s statement whether permanent damage to the vehicle might result if the problem were still ignored.