Fe3+–OH groups of a Fe–H–BEA sample prepared by conventional ion-exchange method are characterized by an IR band at 3686–3684cm−1. They exhibit a weak acidity: upon low-temperature CO adsorption the O–H stretching modes are blue shifted by 100cm−1 and the respective carbonyl adducts are observed at 2158cm−1. The Fe3+–OH groups are reduced at room temperature by NO to form Fe2+–NO species and NO+ groups in cationic positions. Desorption of pre-adsorbed NO at temperatures above 373K regenerates the Fe3+–OH groups. The relation of the Fe3+–OH species to the so-called α-oxygen is discussed.