/live/media/NO/NO_21078_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
NTK 21078 Oxygen Sensor - Downstream
| Brand | NTK 21078 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 17.25 |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Thread Diameter | 18.000 |
| Mounting Type | Threaded |
| Product line | Direct Fit Oxygen Sensor |
| Fits | Buick · 3 vehicles |
Direct-fit design. Application-specific replacement for a precise OE-style installation.
Heated sensor. Helps the sensor reach operating temperature quickly for emissions control.
OE-tested quality. Manufactured and tested to meet or exceed OE specifications.
Cross-references DENSO Auto Parts 234-4975 and 12658647 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct-Fit Oxygen Sensor
NTK 21078 is a direct-fit oxygen sensor built for specific applications and engineered for OE-style fit, form, and function. It uses a heated, threaded design with a 4-wire configuration and a 17.25-inch harness for a precise replacement setup.
Compatible with Buick Verano applications, this NTK oxygen sensor is part of the Direct Fit Oxygen Sensor line, which focuses on streamlined coverage and application-specific replacement parts. The part number 21078 is also referenced for the same application as DENSO Auto Parts 234-4975.
Key Features
- Direct-fit replacement for specific emission control applications
- Heated oxygen sensor design for faster operating readiness
- Threaded mounting with 18.000 thread diameter
- 4-wire configuration with 17.25-inch wiring harness
- OE-focused fit, form, and function from NTK
Detailed Description
NTK 21078 is an oxygen sensor for downstream use on 2015-2017 Buick Verano models. It is built as a specific-fit replacement with a threaded mounting type and heated sensor construction, making it a direct match for the listed application. The NTK 21078 part number is associated with OE-level application coverage and is manufactured under NTK's sensor-focused product line.
NTK draws on its ceramics expertise and OE sensor manufacturing background to produce oxygen sensors that are extensively tested during manufacturing. For buyers searching for a 2015 Buick Verano downstream oxygen sensor, a 2016 Buick Verano downstream oxygen sensor, or a 2017 Buick Verano downstream oxygen sensor, this part provides the specified fitment and configuration.
What It Is Used For
- Replacing a failed downstream oxygen sensor
- Restoring proper exhaust gas feedback to the engine control system
- Addressing sensor-related fault codes or emissions warnings
- Correcting drivability issues tied to inaccurate oxygen sensor readings
- Replacing a sensor with the correct threaded, heated configuration
Installation Notes and Tips
Verify the downstream location and connector configuration before installation. Confirm thread diameter, harness length, and wire count against the removed sensor to ensure the correct match. Use the listed fitment for 2015-2017 Buick Verano applications and confirm the part number 21078 before installation.
Quality Assurance
NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand is part of the NGK family of products and is recognized as a major OE oxygen sensor supplier.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2017 | Buick | Verano | 2.4L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2016 | Buick | Verano | 2.4L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2015 | Buick | Verano | 2.4L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| No rows match your filter. | ||||||