Tokyo ? Toyota started recalling more than 90,000 luxury Lexus and Crown vehicles Monday in Japan over defective engines — the latest setback for the automaker beset with quality problems.

Toyota Motor Corp. said recalls in overseas markets will follow soon.

Toyota told the Japanese government today it was recalling 91,903 vehicles for flaws in the valve springs, a crucial engine component, that could make the automobile stall while in motion.

The quality problem affecting top-of-the-line products comes as Toyota struggles to move on from massive global recalls that started in October. It already has recalled more than 8.5 million vehicles for various problems, including sticking gas pedals, braking software glitches and defective floor mats.