NTK
Direct Fit Oxygen Sensor

NTK 21562 Oxygen Sensor - Downstream

Brand NTK 21562
Position Downstream
Wiring Harness Length 15.7500
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 Pontiac and Saturn · 4 vehicles

Direct-fit design. Specific-fit replacement with OE-style form and connector layout.

Heated sensor. 4-wire construction with threaded mounting for stable exhaust feedback.

OE-focused engineering. Built by NTK, a major original equipment oxygen sensor supplier.

Cross-references Bosch 15280, DENSO Auto Parts 234-4820 and Dorman - HELP 15902 for the same application. See all 5.

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Direct-Fit Oxygen Sensor

NTK 21562 is a specific-fit heated oxygen sensor built for direct replacement applications. It uses a threaded mounting design, a 4-wire configuration, and a 15.75-inch harness length 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 for secure installation
  • 4-wire configuration with 15.75-inch harness length
  • 18 mm thread diameter

Detailed Description

NTK 21562 is part of the Direct Fit Oxygen Sensor line, engineered for applications that require an OE-style replacement with the correct connector and harness layout. NTK is known for oxygen sensor manufacturing and supplies original equipment sensors worldwide, with production processes that control ceramic components from raw material through finished product. This sensor is built to deliver the fit, form, and function expected in emission control service work.

Compatible With 2007-2008 Pontiac Solstice, downstream, and 2007-2008 Saturn Sky, downstream. This part cross-references Bosch 15280 and DENSO Auto Parts 234-4820 for the same application. The NTK 21562 part number is also referenced in interchange listings for related OE-equivalent applications.

What It Is Used For

  • Replacing a failed downstream oxygen sensor
  • Addressing oxygen sensor fault codes
  • Restoring exhaust feedback to the engine control system
  • Correcting drivability issues tied to sensor signal loss
  • Replacing a sensor with damaged wiring or connector wear

Installation Notes and Tips

Verify the downstream position, connector style, thread diameter, and harness length before installation. Confirm the vehicle uses the specific-fit configuration listed for NTK 21562 and match the sensor marking and OE-equivalent design notes in the fitment data.

Quality Assurance

NTK tests oxygen sensors during manufacturing to help ensure quality and reliability that meet or exceed OE specifications. The brand is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier.

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2008PontiacSolstice2.0LL4DownstreamB1S2; 1st Design; Sensor Marked 12590594; OE Equivalent Design; Direct Fit Oxygen Sensor
2008SaturnSky2.0LL4DownstreamB1S2; 1st Design; Sensor Marked 12590594; OE Equivalent Design; Direct Fit Oxygen Sensor
2007PontiacSolstice2.0LL4DownstreamB1S2; 1st Design; Sensor Marked 12590594; OE Equivalent Design; Direct Fit Oxygen Sensor
2007SaturnSky2.0LL4DownstreamB1S2; 1st Design; Sensor Marked 12590594; OE Equivalent Design; Direct Fit Oxygen Sensor
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15280DENSO Auto Parts — 234-4820Dorman - HELP — 15902213-384612590594