NTK 21514 oxygen sensor for the 2003-2005 Chevrolet Silverado 1500 V8 4.8L, the 2003-2006 Silverado 1500 V6 4.3L, the 2003-2007 Silverado 1500 V8 6.0L, the 2007 Silverado 1500 V8 4.8L or 5.3L and other vehicles senses oxygen in the exhaust and gives the ECU closed-loop feedback. This NTK oxygen sensor helps control the air-fuel ratio and can alert OBDII systems to possible fuel delivery or catalytic converter efficiency problems.
A worn oxygen sensor can show up as a check engine light, rough running or poorer fuel economy. Before you replace the sensor, rule out exhaust leaks, damaged wiring and fuel or ignition faults that can set similar codes.
This sensor is listed for a wide range of Chevrolet, GMC, Cadillac, Pontiac and Hummer models, including the 2004-2007 Chevrolet Malibu V6 3.5L, the 2006-2007 Malibu V6 3.9L and the 2003-2005 Chevrolet Tahoe V8 4.8L.
Fit and size
Build and materials
One oxygen sensor. This listing holds one sensor, and the vehicles it fits take one.
Is NTK 21514 the right oxygen sensor for a 2003-2005 Chevy Tahoe V8 4.8L?
Yes, NTK 21514 is listed for the 2003-2005 Chevrolet Tahoe V8 4.8L, with a quantity of one per application.
Is this the right oxygen sensor for a 2004-2007 Chevy Malibu V6 3.5L or a 2006-2007 V6 3.9L?
Yes, NTK 21514 is listed for both. If your car is not one of those, look it up in the "Vehicles it fits" section.
What hex size is this NTK O2 sensor?
NTK 21514 has a 7/8" (22mm) hex and an M18 - 1.5 thread. It is a heated, narrow-band switching zirconia type.
Does this oxygen sensor come with water-resistant connectors?
Yes, the sensor comes with OE-specified, water-resistant connectors and harness accessory hardware. This listing is one oxygen sensor.
What testing do NTK sensors go through?
Development includes vibration and thermal shock testing, and the sensors are also tested during manufacturing.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
