Bosch Oxygen Sensor P/N:15524

Keep closed-loop fuel control accurate with the Bosch Switching-Type Oxygen Sensor 15524, a narrow-band heated O2 sensor that reports the exhaust air-fuel ratio to the ECU for stable combustion control. It installs in the upstream position as a direct-fit replacement for the 2003-2004 Infiniti FX35 (V6-3.5L), 2003-2004 Infiniti G35 (V6-3.5L), 2003 Nissan 350Z (V6-3.5L), and 2003-2004 Nissan Pathfinder (V6-3.5L).

• Switching-type feedback: Provides air-fuel-ratio measurements to the ECU, helping maintain closed-loop control and supporting reduced emissions.
• Fast response: Reaches operating temperature in under 10 seconds for quick signal availability during cold start.
• Durable build: Stainless steel housing, integrated heater element, advanced ceramic element, and TSP coating, rated for exhaust streams up to 1,880°F.
• Specs & install: 4-wire, male square connector with blade terminals, M18-1.5 thread, 22 mm hex; direct-fit connector and pre-applied conductive anti-seize on the threads. Wiring harness included; mounting bracket not included.

A slow, biased, or dead oxygen sensor can trigger a check engine light, rough running, or higher fuel use; if the original upstream sensor is the cause, this replaces it. Quantity varies by application — the FX35, G35, and 350Z use two, while the Pathfinder uses one; confirm your vehicle's needs. Country of origin: Japan. Manufacturer part number 15524.