BMW 5 Series Oxygen Sensor 11787513963 0258005310, improves power response efficiency

BMW 5-Series oxygen sensor (OEM numbers 11787513963/0258005310) with high-temperature ceramic core and precision welded housing; durable for high-load operation. Fits N52/N55 engine models in 520i, 525i, 530i, etc.; monitors exhaust oxygen content to adjust air-fuel ratio for improved throttle response and avoidance of acceleration lag. Replacement requires a special socket; avoid wire strain; difficulty moderate.