BMW Oxygen Sensor 11787557758 0258017101 Stable Signal Direct Replacement

When BMW engine warning light is on with rough idle, abnormal fuel consumption, or reduced acceleration, it may be due to oxygen sensor aging/failure causing air-fuel imbalance. This sensor monitors exhaust oxygen content in real time and feeds ECU to accurately control injection; this product OEM 11787557758 (compatible with 0258017101) fits BMW 3 Series (E90/E91), 5 Series (E60), X3 (E83), and other models; replace OEM part directly to restore performance. Use a dedicated socket and keep connectors clean and dry.