Acura has recalled two models of SUVs because the automatic emergency braking systems can malfunction and put the vehicles at risk of a collision.

The recall involves just under 48,000 MDX and RLX SUVs worldwide from the 2014 and 2015 model years and shows how even sophisticated safety technology can be prone to real-world glitches.

Acura’s “Collision Mitigation Braking System” uses radar to scan conditions in front of the vehicles. If it determines the SUVs might hit an object, it automatically applies the brakes, slowing the SUVs to lessen damage and injuries.

In the recalled SUVs, the system can become confused and step on the brakes when it detects another vehicle accelerating in front while simultaneously driving along an iron fence or metal guardrail, according to Honda, the maker of Acura. The problem first surfaced in Japan in November of 2013 when an SUV braked for no reason and caused a rear-end collision. While Honda investigated, a second incident happened in June of last year.

Honda later duplicated the problem, figured out the cause and told safety regulators of the recall in May. The company says it has no reports of warranty claims, incidents or injuries in the U.S.