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NTK 21563 Oxygen Sensor - Downstream Left or Downstream Right
| Brand | NTK 21563 |
|---|---|
| Position | Downstream Right and Downstream Left |
| Wiring Harness Length | 31.5000 |
| 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 | Cadillac · 4 vehicles |
Direct fit design. Application-specific replacement with OE-style fit, form, and function.
Heated 4-wire sensor. Built for faster response and stable exhaust feedback.
OE-tested quality. Extensively tested during manufacturing to meet or exceed OE specifications.
Cross-references Walker Exhaust 15147, 75-3697 and 213-3627 for the same application. See all 6.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct Fit Oxygen Sensor for Cadillac XLR
Restore accurate exhaust feedback with this NTK direct fit oxygen sensor, part number 21563. It is built as a specific-fit, threaded heated sensor with a 4-wire design and OE-style form for straightforward replacement on supported Cadillac XLR applications.
Key Features
- Direct fit oxygen sensor for specific applications
- Heated sensor design for faster operating response
- 4-wire configuration with threaded mounting
- 31.5-inch wiring harness length
- 18 mm thread diameter
- NTK part number 21563
Detailed Description
NTK 21563 is part of the Direct Fit Oxygen Sensor line, which focuses on application-specific replacement sensors with OE-style fit, form, and function. NTK is known for oxygen sensor manufacturing and uses ceramic-based technology and extensive production testing to support consistent quality. For Cadillac XLR owners, this sensor is listed for 2005-2006 downstream left and downstream right positions, with notes indicating OE-equivalent design and direct fit construction.
This part cross-references Walker Exhaust 15147 for the same application.
Common Replacement Issues
- Faulty oxygen sensor readings
- Check engine light related to sensor performance
- Slow sensor response from a worn heated element
- Incorrect exhaust mixture feedback
- Replacement needs for downstream sensor locations
Installation Notes and Quality Assurance
Use the threaded mounting style and harness length to confirm application match before installation. Verify the connector routing and sensor location against the vehicle’s original configuration, especially on 2005-2006 Cadillac XLR downstream positions. NTK states that these oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications.
NTK is the world’s largest supplier and manufacturer of original equipment oxygen sensors, and the Direct Fit Oxygen Sensor line is built to support OE application coverage.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Cadillac | XLR | 4.6L | V8 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Cadillac | XLR | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2005 | Cadillac | XLR | 4.6L | V8 | Downstream Right | B1S2; 2nd Design; Sensor Marked 12597876; OE Equivalent Design; Direct Fit Oxygen Sensor |
| 2005 | Cadillac | XLR | 4.6L | V8 | Downstream Left | B2S2; 2nd Design; Sensor Marked 12597876; OE Equivalent Design; Direct Fit Oxygen Sensor |
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