Bosch 18005 Oxygen Sensor - Downstream Right

Bosch Actual OE Oxygen Sensor for Nissan

Bosch 18005 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 Nissan applications, including the 2004 Nissan Frontier downstream right and 2004 Nissan Xterra downstream right.

The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, with sensor designs that evolved from early thimble-style units to planar narrowband technology for faster light-off, improved lambda accuracy, and quicker closed-loop operation. Bosch 18005 uses a threaded metal housing, a square male connector, and a 4-wire harness for direct-fit replacement in the correct application.

Key Features

• Specific-fit Bosch oxygen sensor for confirmed Nissan applications
• Narrow-band heated oxygen sensor for closed-loop fuel control
• 4-wire design with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Square male connector with blade terminals
• Metal housing built for high-temperature and vibration exposure
• Part number 18005 for catalog and cross-reference lookup

Detailed Description

Bosch 18005 is an Actual OE Oxygen Sensor engineered to provide accurate exhaust oxygen feedback so the engine control module can adjust fuel delivery and maintain proper combustion. In the confirmed fitment list, it fits 2004 Nissan Frontier, downstream right, and 2004 Nissan Xterra, downstream right. For buyers searching for a downstream right oxygen sensor for 2004 Nissan Frontier or 2004 Nissan Xterra, Bosch 18005 offers the OE-style configuration needed for the listed application.

This Bosch oxygen sensor uses a heated narrow-band sensing element, optimized heater control, and durable ceramic construction to maintain consistent signal output under demanding thermal conditions. The 26-inch wiring harness length and 29.7-inch overall length support the specified installation layout, while the threaded mount and 18 mm thread size match the intended exhaust bung configuration. This part cross-references Nissan 226A0EK810 for the same application.

Common Issues It Can Help Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable closed-loop fuel control
• Increased exhaust emissions from a worn sensor
• Delayed sensor response during warm-up or driving

Installation Notes and Tips

Verify the downstream right location before ordering, since Bosch 18005 is specific to the listed application. Confirm the 18 mm thread size, 22 mm hex size, and square connector style match the vehicle harness and exhaust bung. Inspect the connector, wiring route, and exhaust threads before installation, and replace the sensor only after the exhaust has cooled fully.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Actual OE Oxygen Sensor line is built to deliver OE-proven fit and signal performance for the specified Nissan applications, including the 2004 Nissan Frontier and 2004 Nissan Xterra.