OE Quality
60-Day Returns

Walker 250-23504 Oxygen Sensor - Upstream
Overview of Walker Products OE Oxygen Sensor 250-23504
The Walker Products OE Oxygen Sensor 250-23504 is designed specifically for Nissan 300ZX models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.
- Heated oxygen sensor for accurate emissions monitoring
- Specific fit for Nissan 300ZX vehicles
- Threaded mounting with 12.0 mm thread diameter
- 14.49-inch wiring harness length with 3 wires of 20 gauge
- Radiused polygon male connector for reliable connection
- Overall length of 18.03 inches for proper fitment
Detailed Product Description
This Walker Products OE oxygen sensor (part number 250-23504) is engineered to meet the exact specifications of Nissan 300ZX models. The sensor type is heated, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The sensor includes a 14.49-inch wiring harness with three 20-gauge wires, providing a durable and stable electrical connection. Its radiused polygon male connector ensures a secure fit with the vehicle’s wiring harness, minimizing the risk of disconnection or signal loss. The threaded mounting type with a 12.0 mm diameter allows for straightforward installation and reliable sensor positioning within the exhaust system.
Walker Products OE Brand Line Information
The Walker Products OE line focuses on delivering original equipment quality parts designed to meet or exceed factory specifications. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with Nissan’s original components. Using a Walker Products OE sensor helps maintain the integrity of the vehicle’s emission control system and supports compliance with environmental standards.
Common Applications and Issues Addressed
- Restores accurate oxygen sensing for proper air-fuel mixture control
- Helps resolve rough idling and engine hesitation
- Reduces increased emissions and failed emissions tests
- Prevents poor fuel economy caused by faulty sensors
- Eliminates check engine light codes related to oxygen sensor failure
Installation Notes and Tips
When installing the Walker Products OE oxygen sensor 250-23504, ensure the threaded mounting hole is clean and free of debris. Use anti-seize compound on the threads if recommended by the vehicle manufacturer to prevent seizing. Connect the radiused polygon male connector firmly to the vehicle’s wiring harness to avoid electrical issues. Verify the wiring harness length and sensor orientation match the original sensor to ensure proper fitment and function.
Quality Assurance and Warranty
Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This part is designed to provide consistent operation within the emission control system of Nissan 300ZX vehicles. Warranty coverage details should be confirmed with the supplier or manufacturer, as they may vary.
| Brand | Walker |
| Part Number | 250-23504 |
| Position | Walker Products OE, Upstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 18.03 |
| Sensor Type | Heated |
| Thread Diameter | 12.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 3 |
| Wiring Harness Length | 14.49 |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1989 | Nissan | 300ZX | 3.0L | V6 | GAS | Upstream | Install upstream oxygen sensor for optimal performance.; Walker Products OE |
| 1988 | Nissan | 300ZX | 3.0L | V6 | GAS | Upstream | Install upstream oxygen sensor for optimal performance.; Walker Products OE |
| 1987 | Nissan | 300ZX | 3.0L | V6 | GAS | Upstream | Install upstream oxygen sensor for optimal performance.; Walker Products OE |
* 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.