Mazda Front Oxygen Sensor L555-18-861 OEM Specification Fast Response

This Mazda front oxygen sensor is designed for 2006–2012 Mazda3 (2.0L), 2007–2013 Mazda6 (2.3L), 2008–2014 Mazda CX-7 (2.3T) and 2009–2015 Mazda5 (2.0L) with 2.0L, 2.3L, and 2.3T displacements. Monitors exhaust oxygen content, feeds the ECU air-fuel ratio signals to optimize combustion efficiency and reduce emissions. OEM number L555-18-861; cross references include L555188G1, 234-5043, L555-18-8G1B, L555-18-8G1A for stock checks. Replacement difficulty medium; use a dedicated oxygen sensor socket to avoid thread damage; apply anti-seize agent beforehand to extend life. For B2B buyers, this sensor uses OEM-spec rapid response design to reduce false alarms and fuel economy issues; suitable for maintenance shops or tuner shops in bulk.