234-9038 O2 Sensor Upstream Bank 1 Sensor 1 Replacement for Nissan Altima 2008-2011 for Frontier 2008-2010 Pathfinder 2008-2012 Titan Armada Xterra 2008-2012 for Infiniti QX56 Upstream Oxygen Sensor AUTO_bestsellers_Oct2025 With the nozzle removed

With the nozzle removed

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234-9038 O2 Sensor Upstream Bank 1 Sensor 1 Replacement for Nissan Altima 2008-2011 for Frontier 2008-2010 Pathfinder 2008-2012 Titan Armada Xterra 2008-2012 for Infiniti QX56 Upstream Oxygen Sensor AUTO_bestsellers_Oct2025 With the nozzle removed234 9038 O2 Sensor Upstream Bank 1 Sensor 1 Replacement for Nissan Altima 2008 2011 for Frontier 2008 2010 Pathfinder 2008 2012 Titan Armada Xterra 2008 2012 for Infiniti QX56 Upstream Oxygen Sensor Product Features Direct replacement for 234 9038 upstream sensor Designed as a direct replacement for part numbers 234 9038 and 2349038. Installed in the upstream position as bank 1 sensor 1 to help the engine system maintain proper air fuel monitoring.