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NGK 21049 Oxygen Sensor Direct Fit Heated O2 Sensor

(2002-2003 Chevrolet Trailblazer; 2002-2003 GMC Envoy; 2002-2003 Oldsmobile Bravada; 2003 Isuzu Ascender)

Manufacturer

Picture for manufacturer NGK Spark Plugs

Part Number

21049
7 reviews
Sale Price

$42.89

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The NGK 21049 Oxygen Sensor (also called an O2 sensor or air-fuel ratio sensor) is a direct-fit replacement. It monitors the oxygen content of the exhaust gas and sends that data to the engine control module. The ECM uses it to adjust the air-fuel mixture for fuel efficiency, performance and emissions control. A worn sensor can cause a check engine light, poor fuel economy or a failed emissions test.

Key Features:

  • Direct-fit design with an OE-style connector for straightforward installation
  • Integrated heater brings the sensor to operating temperature quickly, for faster closed-loop activation and lower cold-start emissions
  • Advanced ceramic sensing element with a protective overcoat that resists contaminant poisoning
  • Corrosion-resistant housing helps protect the element from silicone and lead poisoning
  • Porous PTFE filter lets atmospheric oxygen in while keeping water and engine contaminants out
  • Water-resistant connector and OE-specified harness hardware
  • Narrow-band switching zirconia type with a 7/8 in. (22 mm) hex and a wiring harness length of about 16.75 in.
  • Built to OE standards and tested for vibration and thermal shock

Cross-references: replaces General Motors 12589549 and 12577588, Standard Motor Products SG707, SG708 and SG1629, and Spectra Premium OS5058.

Made by NGK/NTK, one of the world's largest oxygen sensor manufacturers, this sensor helps restore accurate air-fuel control and keep emissions within limits.

Products specifications

Fits

2002-2003 Chevrolet Trailblazer; 2002-2003 GMC Envoy; 2002-2003 Oldsmobile Bravada; 2003 Isuzu Ascender

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