Keep the engine's fuel trim on target with the Bosch Oxygen Sensor 18134, an upstream (pre-catalyst) sensor that installs as a direct-fit replacement for the 2011-2012 INFINITI G25, 2013-2018 NISSAN ALTIMA, 2011-2017 NISSAN JUKE, 2012-2017 NISSAN NV2500, and 2012-2017 NISSAN NV3500.
Mounted ahead of the catalytic converter, this upstream sensor measures the oxygen content in the exhaust stream and reports it to the engine control unit, which the ECU uses to adjust the air-fuel ratio for cleaner, more efficient combustion.
- Upstream position: reads exhaust gases before the catalytic converter to inform closed-loop fuel control.
- Air-fuel feedback: helps the ECU trim fuel delivery toward the target ratio.
- Direct-fit replacement: intended to replace the original upstream oxygen sensor on the listed applications.
Signs the original upstream sensor may need replacing include a check engine light, a stored oxygen-sensor code, rough or uneven running, and reduced fuel economy. Because those symptoms can have other causes, diagnose the fault before replacing. If a failed upstream oxygen sensor is confirmed as the cause, this Bosch unit replaces it.
Manufacturer part number 18134.
