Enables G protein-coupled receptor activity. Involved in several processes, including positive regulation of acute inflammatory response to non-antigenic stimulus; positive regulation of cytokine production; and regulation of secretion by cell. Acts upstream of or within adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway; positive regulation of action potential; and regulation of heart rate by chemical signal. Is active in membrane. Is expressed in cervical ganglion; peripheral nerve trunk; superior cervical ganglion; sympathetic ganglion; and sympathetic nerve trunk. Orthologous to several human genes including FFAR3 (free fatty acid receptor 3). [provided by Alliance of Genome Resources, Apr 2022]