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NTK 21080 Oxygen Sensor - Downstream
| Brand | NTK 21080 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 11.02 |
| 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 and Chevrolet · 8 vehicles |
Direct fit design. Specific-fit replacement for straightforward application matching.
Heated sensor. Supports faster operating response in exhaust monitoring systems.
OE-style coverage. Extensively tested to meet or exceed OE specifications.
Cross-references 55570074 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct Fit Oxygen Sensor Overview
NTK Direct Fit Oxygen Sensor 21080 is a specific-fit heated oxygen sensor built for downstream applications. It is engineered for direct replacement use and supports accurate exhaust monitoring with OE-style fit, form, and function.
- Heated oxygen sensor for faster operating response
- Specific-fit design for straightforward application matching
- Threaded mounting type with 18.000 thread diameter
- 4-wire configuration with 11.02 wiring harness length
- NTK oxygen sensor technology backed by extensive manufacturing testing
Fitment and Application
Compatible with select Buick and Chevrolet models. Fits 2016-2019 Buick Cascada, downstream. Fits 2016-2019 Chevrolet Malibu, downstream. This part cross-references GM (e.g., 55570074) for the same application. NTK 21080 is a direct fit oxygen sensor for downstream exhaust locations on these vehicles.
What This Sensor Helps Address
- Check engine light concerns related to oxygen sensor performance
- Incorrect air-fuel ratio feedback from a worn sensor
- Slow sensor response in heated exhaust monitoring systems
- Fault codes tied to downstream oxygen sensor readings
Installation Notes and Quality
Use the threaded mounting design and wire count to confirm application match before installation. Verify connector routing and harness length against the original sensor location. NTK states these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. Part number 21080 is part of NTK's Direct Fit Oxygen Sensor line, focused on OE-style replacement coverage.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2019 | Buick | Cascada | 1.6L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2019 | Chevrolet | Malibu | 1.8L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2018 | Buick | Cascada | 1.6L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2018 | Chevrolet | Malibu | 1.8L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2017 | Buick | Cascada | 1.6L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2017 | Chevrolet | Malibu | 1.8L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2016 | Buick | Cascada | 1.6L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
| 2016 | Chevrolet | Malibu | 1.8L | L4 | Downstream | B1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor |
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