Honda Acura Crankshaft Position Sensor 37510-RNA-A01

2005–2012 Ford Focus 1.6L and 1.8L (also compatible with some Mazda3 platforms) can use oxygen sensor 3M51-9G444-DC. Monitors exhaust oxygen content in real time, sending signals to the ECU to optimize air-fuel ratio; ensures emissions compliance and improves fuel economy. OEM number 3M51-9G444; cross-check recommended. Use a dedicated socket for removal; apply anti-seize before installation to extend life; difficulty medium. If check engine light is on or fuel economy abnormal, check this part first.