Ford said it began sending letters to affected owners this week to warn of safety risks related to potential fuel pump failures.

A faulty low-pressure fuel pump could cause engines to stall while driving, raising crash risks for hundreds of thousands of Ford units.

Ford is recalling more than 850,000 of its cars across the U.S. because the low-pressure fuel pump inside the vehicles may fail — and potentially cause an engine stall while driving, increasing crash risks.