OE Quality
60-Day Returns

Bosch 15973 Oxygen Sensor - Downstream
Overview of Bosch Actual OE Oxygen Sensor 15973
The Bosch Actual OE Oxygen Sensor 15973 is designed specifically for Nissan Frontier and Xterra models. This narrow-band heated oxygen sensor ensures accurate emission control and optimal engine performance by monitoring exhaust gases effectively.
- Wiring harness length: 20.9 inches
- Overall length: 30 inches
- Thread size and diameter: 18 mm
- Heated narrow-band sensor type
- 4-wire configuration with blade terminals
- Square male connector with 4 terminals
- Threaded mounting type with 22 mm hex size
- Durable metal housing in steel finish
- Wiring harness included for direct replacement
About the Bosch Actual OE Oxygen Sensor Product Line
The Bosch Actual OE Oxygen Sensor line is engineered to meet original equipment specifications, providing reliable and precise sensor performance. This product line focuses on delivering standard replacement sensors that maintain factory-level emission control standards, ensuring compatibility and durability for specific vehicle applications like the Nissan Frontier and Xterra.
Detailed Product Description
This Bosch oxygen sensor features a narrow-band heated design, which allows it to reach operating temperature quickly for accurate oxygen level readings. The sensor includes a 4-wire setup with blade terminals and a square male connector, facilitating a secure and precise electrical connection. Its threaded mounting type with an 18 mm thread diameter and 22 mm hex size ensures proper fitment and ease of installation. The sensor’s metal housing with a steel finish provides durability against harsh engine conditions. With a wiring harness length of 20.9 inches and an overall length of 30 inches, this sensor is tailored for specific fitment on Nissan Frontier and Xterra models, part number 15973.
Common Applications and Issues Addressed
- Restores accurate air-fuel mixture readings for improved engine efficiency
- Helps resolve check engine light triggers related to oxygen sensor faults
- Reduces emissions by ensuring proper catalytic converter function
- Prevents rough idling and poor fuel economy caused by faulty sensors
- Maintains compliance with emission regulations for Nissan Frontier and Xterra vehicles
Installation Notes and Tips
When installing the Bosch Actual OE Oxygen Sensor 15973, ensure the sensor is threaded securely into the exhaust manifold or pipe using the 22 mm hex size tool. Avoid over-tightening to prevent damage to the sensor or mounting threads. The included wiring harness with a square male connector and blade terminals should be connected firmly to the vehicle’s wiring system. This sensor is a specific fit for Nissan Frontier and Xterra models, so verify vehicle compatibility before installation.
Quality Assurance and Warranty
Bosch oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Actual OE Oxygen Sensor line is designed as a standard replacement part that meets original equipment specifications. While specific warranty details are not provided here, Bosch typically offers coverage against manufacturing defects. Always consult the product documentation or supplier for exact warranty terms.
| Brand | Bosch |
| Part Number | 15973 |
| Position | Actual OE Oxygen Sensor, Downstream |
| Wiring Harness Length | 20.9 |
| Terminal Type | Blade |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Grade Type | Standard replacement |
| Connector Shape | Square |
| Terminal Quantity | 4 |
| Connector Gender | Male |
| Terminal Gender | Male |
| Overall Length | 30 |
| Mounting Type | Threaded |
| Automotive Color / Finish | Steel |
| Automotive Item Weight (lbs) | 0.31967 lb |
| Heated (Oxygen Sensor) | Yes |
| Hex Size (Oxygen Sensor) | 22 mm |
| Housing Material | Metal |
| Length (Sealing Surface To End Of Connector) | 23.4 in |
| Mounting Bracket Included | No |
| Oxygen Sensor Type | Narrow-band heated |
| Sensor Type | Narrow-band |
| Thread Diameter (Oxygen Sensor) | 18 mm |
| Thread Size | 18 |
| Wiring Harness Included | Yes |
This part fits 8 vehicles. Search below:
| Year | Make | Model | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2004 | Nissan | Xterra | 2.4L | L4 | Downstream | Actual OE Oxygen Sensor | |
| 2003 | Nissan | Xterra | 2.4L | L4 | Downstream | Actual OE Oxygen Sensor | |
| 2002 | Nissan | Xterra | 2.4L | L4 | Downstream | Actual OE Oxygen Sensor | |
| 2001 | Nissan | Xterra | 2.4L | L4 | Downstream | Actual OE Oxygen Sensor | |
| 2000 | Nissan | Frontier | 4WD | 2.4L | L4 | Downstream | with California Emission System; Actual OE Oxygen Sensor |
| 2000 | Nissan | Xterra | 2.4L | L4 | Downstream | with California Emission System; Actual OE Oxygen Sensor | |
| 1999 | Nissan | Frontier | 4WD | 2.4L | L4 | Downstream | with California Emission System; Actual OE Oxygen Sensor |
| 1998 | Nissan | Frontier | 4WD | 2.4L | L4 | Downstream | with California Emission System; Actual OE Oxygen Sensor |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.