OE Quality
60-Day Returns

NTK 24278 Oxygen Sensor - Downstream, Downstream Left or Downstream Right
Overview of NTK Direct Fit Oxygen Sensor 24278
The NTK Direct Fit Oxygen Sensor 24278 is designed to provide precise air-fuel mixture readings for improved engine performance and emissions control. This heated oxygen sensor features a specific fitment, ensuring compatibility with select vehicle makes and models requiring an 18mm threaded sensor.
- Heated oxygen sensor for faster response times
- Specific fit design for direct replacement
- Threaded mounting type with 18mm thread diameter
- Four-wire configuration for accurate signal transmission
- 23.5-inch wiring harness length for optimal installation
About the NTK Direct Fit Oxygen Sensor Line
The Direct Fit Oxygen Sensor line by NTK focuses on providing sensors that match OEM specifications for exact fit and function. This line is engineered to simplify installation and maintain vehicle emissions compliance by using precise wiring and mounting configurations. The 24278 sensor is part of this line, offering a heated sensor with a threaded mounting type and a four-wire setup tailored for specific vehicle applications.
Detailed Product Description
The NTK 24278 oxygen sensor is a heated sensor designed to quickly reach operating temperature, improving the accuracy of oxygen level readings in the exhaust system. Its 18mm threaded mounting ensures a secure and leak-free fit in the exhaust manifold or pipe. The sensor’s four-wire design supports both the heating element and signal wires, enhancing durability and signal reliability. With a 23.5-inch wiring harness, this sensor provides sufficient length for straightforward routing and connection to the vehicle’s engine control unit.
Common Applications and Issues Addressed
- Restores proper air-fuel ratio readings for improved fuel efficiency
- Helps resolve check engine light codes related to oxygen sensor failure
- Reduces emissions by ensuring accurate exhaust gas monitoring
- Prevents rough idling and engine hesitation caused by faulty sensors
- Supports compliance with emissions testing requirements
Installation Notes and Tips
Installation of the NTK 24278 oxygen sensor requires a compatible vehicle with an 18mm threaded sensor port. Ensure the engine is cool before removal to avoid burns. Use an oxygen sensor socket or appropriate wrench to remove the old sensor. Verify the wiring harness length and connector match the vehicle’s harness to avoid electrical issues. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer to facilitate future removal.
Quality Assurance and Warranty
NTK oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor 24278 is manufactured to provide reliable operation under typical driving conditions. Warranty coverage details should be confirmed with the product documentation or supplier, as they may vary by region and application.
| Brand | NTK |
|---|---|
| Part Number | 24278 |
| Position | Direct Fit Oxygen Sensor, Downstream |
| Mounting Type | Threaded |
| Sensor Type | Heated |
| Thread Diameter | 18.000 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 23.5000 |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2000 | Suzuki | Grand Vitara | 2.5L | V6 | Downstream Right | Replacement oxygen sensor for B2S2 location.; Direct Fit Oxygen Sensor |
| 2000 | Suzuki | Grand Vitara | 2.5L | V6 | Downstream Left | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 1999 | Suzuki | Grand Vitara | 2.5L | V6 | Downstream Right | Replacement oxygen sensor for B2S2 location.; Direct Fit Oxygen Sensor |
| 1999 | Suzuki | Grand Vitara | 2.5L | V6 | Downstream Left | B1S2 oxygen sensor meets OEM standards.; Direct Fit 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.