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NGK 21545 Oxygen Sensor 4-Wire Heated Direct Fit 17.75 in. Lead

(Chevrolet Trailblazer 2006, Express 3500 2003-07, Express 2500 2003-07, Astro 2003-05, Express 1500 2003-07, SSR 2006; GMC Envoy 2006 + 7 more models)

Manufacturer

Picture for manufacturer NGK Spark Plugs

Part Number

21545
7 reviews
Sale Price

$70.37

3 left at this price

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Usually delivered within 2 days

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Product Details

The NGK (NTK) 21545 oxygen sensor, also called an O2 sensor or air-fuel ratio sensor, is a heated, direct-fit switching sensor. It monitors the oxygen content in the exhaust and sends that data to the engine computer. The computer uses it to adjust the air-fuel mixture for efficient combustion and emissions control.

Key Features:

  • Heated sensor element for faster warm-up and response
  • 4-wire configuration with a 17.75 in. wiring harness
  • Switching type with a 0-1 V signal range
  • 18 mm thread-in mounting
  • Direct-fit, OE-equivalent design for fit, form and function
  • Does not include an oxygen sensor bung

Cross-References: ACDelco 213-1531, 213-2830; Bosch 15543; BWD OS1691, OS2418; Delphi ES20113; Carquest 75-3034.

A worn or failing oxygen sensor can lead to a check-engine light, poor fuel economy and higher emissions. Replacing it with a direct-fit NGK sensor helps restore proper fuel control and engine efficiency.

Products specifications

Fits

Chevrolet Trailblazer 2006, Express 3500 2003-07, Express 2500 2003-07, Astro 2003-05, Express 1500 2003-07, SSR 2006; GMC Envoy 2006, Savana 2500 2003-07, Savana 3500 2003-07, Savana 1500 2003-07, Safari 2003-05; Saab 9-7x 2006 + 2 more models

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