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NTK 21566 Oxygen Sensor - Downstream Left or Downstream Right
| Brand | NTK 21566 |
|---|---|
| Position | Downstream Right and Downstream Left |
| Wiring Harness Length | 26.5000 |
| 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, Chevrolet, Pontiac, and Saturn · 24 vehicles |
Direct-fit design. Specific-fit replacement for streamlined installation and OE-style routing.
Heated sensor. Supports faster exhaust feedback and stable signal operation.
Threaded mount. 18 mm thread diameter with a 4-wire configuration for application-specific use.
Cross-references Bosch 15165, DENSO Auto Parts 234-4341 and 75-3714 for the same application. See all 10.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Direct-Fit Oxygen Sensor
NTK Oxygen Sensor 21566 is a specific-fit, heated oxygen sensor built for direct replacement applications. It uses a threaded mounting design and a 4-wire configuration with a 26.5-inch harness for a clean, OE-style installation.
Key Features
- Heated oxygen sensor for precise exhaust monitoring
- Specific-fit design for direct replacement use
- Threaded mounting type with 18 mm thread diameter
- 4-wire construction for signal and heater circuit operation
- 26.5-inch wiring harness for application-specific routing
Application Details
Fits 2008-2012 Chevrolet Malibu, downstream right. Fits 2006-2010 Cadillac STS, downstream left. Fits 2007-2009 Cadillac SRX, downstream left. Fits 2006-2009 Cadillac STS, downstream right. Fits 2008-2009 Pontiac G6, downstream right. Fits 2008-2009 Saturn Aura, downstream right. This part cross-references Bosch 15165 and DENSO Auto Parts 234-4341 for the same application.
What It Helps Address
- Faulty oxygen sensor readings
- Check engine light concerns related to sensor performance
- Incorrect air-fuel feedback to the engine control system
- Exhaust monitoring issues caused by a worn sensor element
Installation Notes
Use the threaded mounting style and harness length to match the original routing and connector location. Confirm downstream position and left or right placement before installation. Verify thread diameter and wire count against the original sensor on the vehicle.
Quality Assurance
NTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. This oxygen sensor is extensively tested during manufacturing to meet or exceed OE specifications for fit, form, and function.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2012 | Chevrolet | Malibu | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2011 | Chevrolet | Malibu | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2010 | Cadillac | STS | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2010 | Chevrolet | Malibu | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2009 | Cadillac | SRX | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2009 | Cadillac | STS | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2009 | Cadillac | STS | 4.4L | V8 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2009 | Cadillac | STS | 4.4L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2009 | Chevrolet | Malibu | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2009 | Pontiac | G6 | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2009 | Saturn | Aura | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2008 | Cadillac | SRX | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2008 | Cadillac | STS | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2008 | Cadillac | STS | 4.4L | V8 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2008 | Cadillac | STS | 4.4L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2008 | Chevrolet | Malibu | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2008 | Pontiac | G6 | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2008 | Saturn | Aura | 3.6L | V6 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | Cadillac | SRX | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2007 | Cadillac | STS | 4.6L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2007 | Cadillac | STS | 4.4L | V8 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2007 | Cadillac | STS | 4.4L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
| 2006 | Cadillac | STS | 4.4L | V8 | Downstream Right | Downstream oxygen sensor with original equipment equivalent design; Direct Fit Oxygen Sensor |
| 2006 | Cadillac | STS | 4.4L | V8 | Downstream Left | Oxygen Sensor B2S2 placement designed to OE specifications.; Direct Fit Oxygen Sensor |
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