Lingshuai New Lingyang Lingyue 4A9 HOP Crankshaft Position Sensor F01R00F009 Precise Match

Honda Civic, Accord, CR-V etc. oxygen sensor (OEM: 36531-R40-A01, interchangeable with 36531-RB0-003) installed before and after catalytic converter in exhaust pipe; monitors exhaust oxygen content and feeds ECU to control air-fuel ratio for emission compliance and engine efficiency. Difficulty medium; about 30–60 minutes; avoid damaging threads or wiring during removal/installation. If idle jitter or check engine light, inspect and replace.