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NTK 21511 Oxygen Sensor - Downstream
| Brand | NTK 21511 |
|---|---|
| Position | Downstream |
| Wiring Harness Length | 24.0000 |
| 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 | Mitsubishi · 6 vehicles |
Direct-fit design. Application-specific replacement for streamlined installation and OE-style fit.
Heated sensor. Helps the sensor reach operating temperature faster for emissions monitoring.
OE-level testing. Manufactured and tested to meet or exceed original equipment specifications.
Cross-references BBB Industries 13398, Bosch 13417 and Carlson 13400 for the same application. See all 22.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct-Fit Oxygen Sensor
NTK Oxygen Sensor 21511 is a direct-fit, heated oxygen sensor built for specific applications with threaded mounting and a 4-wire design. It is engineered for downstream use and matches the original equipment style for straightforward replacement on select Mitsubishi applications.
NTK 21511 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific coverage and OE-style fit, form, and function. NTK draws on its ceramics expertise and OE sensor manufacturing background to deliver a sensor that aligns with original equipment requirements.
- Heated oxygen sensor for faster operating response.
- Specific-fit design for direct replacement.
- Threaded mounting with 18 mm thread diameter.
- 24-inch wiring harness length for application matching.
- 4-wire configuration for the listed emissions applications.
Fitment and Application
Compatible with select Mitsubishi emissions applications. Fits 2003 Mitsubishi Outlander, downstream. Fits 2000 Mitsubishi Eclipse, downstream. Fits 1997-2000 Mitsubishi Mirage, downstream.
This part cross-references Bosch 13417 and DENSO Auto Parts 234-4639 for the same application.
What It 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 oxygen sensor circuits.
- Replacement needs for downstream emissions monitoring.
Installation Notes and Quality
Use the threaded mounting style and harness length to confirm application match before installation. Verify connector routing and sensor location against the vehicle's original configuration.
NTK tests these oxygen sensors during manufacturing to meet or exceed OE specifications, supporting reliable fit and function for import and domestic applications.
| Year | Make | Model | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2003 | Mitsubishi | Outlander | FWD | 2.4L | L4 | Downstream | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2000 | Mitsubishi | Eclipse | — | 3.0L | V6 | Downstream | Federal Emissions OE Equivalent Design Oxygen Sensor; Direct Fit Oxygen Sensor |
| 2000 | Mitsubishi | Mirage | — | 1.8L | L4 | Downstream | B1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1999 | Mitsubishi | Mirage | — | 1.8L | L4 | Downstream | B1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1998 | Mitsubishi | Mirage | — | 1.8L | L4 | Downstream | B1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor |
| 1997 | Mitsubishi | Mirage | — | 1.8L | L4 | Downstream | B1S2, Federal Emissions, OE Equivalent Design; Direct Fit Oxygen Sensor |
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