Bosch Oxygen Sensor P/N:13418

Keep your engine's fuel mixture in check with the Bosch Oxygen Sensor 13418, an upstream (pre-catalytic-converter) sensor that installs as a direct-fit replacement for the 1994 Nissan D21, 1994-1995 Nissan Pathfinder, and 1995 Nissan Pickup. Mounted ahead of the catalytic converter, it reads the oxygen content in the exhaust stream and sends a signal to the engine control unit, which uses it to adjust the air-fuel ratio for closed-loop fuel control.

• Upstream position: monitors exhaust gases before the catalytic converter to support accurate fuel trim.
• Direct-fit replacement: designed to replace the original oxygen sensor on the listed Nissan applications.
• Bosch build: supplied by Bosch under manufacturer part number 13418.

A worn or contaminated upstream oxygen sensor can send inaccurate readings to the ECU. Signs it may need replacing include a lit check-engine light, reduced fuel economy, or rough running — diagnose the cause first, and if the upstream sensor is at fault, this unit replaces it. Interchange: Manufacturer part number 13418.