Subaru is recalling a number of Crosstrek, Forester, Ascent, and Impreza models in the United States because they could suddenly lose power while driving.

According to Consumer Reports, a faulty positive crankcase ventilation (PCV) valve in the boxer engine used by the aforementioned models could allow oil to enter the combustion chamber. Various pieces of the PCV valve may also separate and enter the engine.

The positive crankcase ventilation valve is an emissions device that prevents pollutants created by the engine being released into the atmosphere. In addition, the PCV valve keeps the engine oil clean and prevents crankcase pressure from building up.

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To resolve the issue, Subaru dealerships will replace the faulty part and replace any other parts that have been damaged because of the issue. Subaru will even replace the entire engine at no cost if that’s what’s deemed necessary.

2018 Subaru Crosstrek models being recalled were produced from May 9, 2017 and April 3, 2018, totaling 83,499 units. Additionally, 37 Subaru Crosstrek Plug-In Hybrids built between September 11, 2018, and October 8, 2018 are also involved in the call back.

Elsewhere, 2017 Subaru Impreza hatchbacks manufactured through October 20, 2016 and March 2, 2018 are involved, totaling 80,219 cars. Similarly, 2017-2018 Impreza sedans built between November 4, 2016 and March 5, 2019 are impacted, as are 2019 Subaru Foresters manufactured from July 4, 2018 through to March 21, 2019, as well as 2019 Subaru Ascent SUVs built between February 22, 2018 and August 31, 2018.