Bosch 15225 Oxygen Sensor - Downstream Rear or Downstream Right

Bosch Actual OE Oxygen Sensor 15225

Bosch 15225 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for specific downstream applications on the 2002-2004 INFINITI I35 and 2002-2003 Nissan Maxima.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated O2 sensor for closed-loop fuel control
• Specific fit with threaded mounting
• 4-wire design with square connector and blade terminals
• Wiring harness included for direct replacement routing
• Metal housing with high-temperature-resistant construction
• 22 mm hex size and 18 mm thread diameter

OE-Style Sensor Line

Bosch Actual OE Oxygen Sensor parts are developed from Bosch’s long OE sensor history, including early thimble-style designs and later planar narrowband technology. The result is a replacement oxygen sensor line focused on fast light-off, accurate lambda measurement, and consistent heater control under thermal and vibration load. Bosch 15225 follows that OE-oriented approach for downstream right and downstream rear applications.

Fitment

• Fits 2002-2004 INFINITI I35, downstream right.
• Fits 2002-2003 Nissan Maxima, downstream rear.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Delayed closed-loop operation after startup
• Rough idle or unstable combustion caused by aging sensor response
• Emissions test failures tied to a worn downstream O2 sensor

Installation Notes

Confirm the connector shape, wire count, and position before installation. This Bosch 15225 sensor uses a threaded mount and a square male connector, so the replacement should match the original harness routing and sensor location on the vehicle. Verify the downstream right or downstream rear placement on the INFINITI I35 or Nissan Maxima before ordering.

Quality Assurance

Bosch backs this Actual OE Oxygen Sensor line with OE development experience and materials selected for heat and vibration resistance. This part cross-references 226A05Y701 for the same application.