Toyota has said it will repair 650,000 Prius models worldwide because of a fault with the coolant pump.

丰田宣布将对全球65万辆冷却液泵存在问题的普锐斯车型进行维修。

The fault with the coolant pump does not represent a safety risk
The problem, which does not represent a safety risk, could cause the vehicle to overheat and lose power.

The Prius models involved were sold between 2004 and 2007 with more than half in North America, 180,000 in Japan and another 70,000 in Europe.

Toyota is the biggest carmaker in the world, and the Prius is the best-selling hybrid¹（混合的） model in Japan.

The company said it had not received any reports of accidents or injuries from problems with the pump, which circulates coolant（冷却剂） for the hybrid system.

Carmakers often carry out this type of repair campaign, which Toyota stresses is not a recall. Safety recalls occur when regulators decide a defect presents a safety risk.

Nonetheless, the fault puts Toyota once more in the spotlight² with the focus on the reliability³ of its vehicles.

Since last November, Toyota has recalled about 14 million vehicles worldwide, including about 11 million in the US.

Toyota said it would begin notifying owners of the Prius repair campaign in the US in early December.