Delphi Oxygen Sensor 25324173 for BYD F3, universal for Mitsubishi 1.5T front and rear

This oxygen sensor is designed for BYD F3 (2005-2015, 1.5L/1.6L) and Mitsubishi 1.5T turbocharged engines; front and rear sensors are interchangeable, directly replacing Delphi components. The sensor monitors oxygen content in exhaust and feeds back to the ECU to adjust air-fuel ratio, ensuring combustion efficiency and emission compliance. OEM number 25324173 (corresponding to GRDE550-31BA) for quick stock verification. Replacement difficulty moderate; use a professional socket wrench; apply anti-seize before installation to prevent seizing at high temperatures. For B2B buyers, this fits many domestic and Mitsubishi-based models with strong stock compatibility to reduce parts variety.