NTK 21559
NTK part number 21559 is a oxygen (o2) sensor in the Exhaust & Emission system. This catalog matches it to 8 year-and-engine configurations from 2007 to 2010.
Verified fitment includes 2010 Hummer H3 5.3L V8 ; 2009 Buick Lucerne 4.6L V8 ; 2009 Hummer H2 6.2L V8 ; 2009 Hummer H3 5.3L V8 ; 2008 Buick Allure 5.3L V8 , plus 3 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is NTK 21559?
NTK part number 21559 is a oxygen (o2) sensor with published application data for 8 vehicle configurations from 2007 to 2010. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does NTK 21559 fit?
This catalog matches 21559 to 8 year-and-engine configurations from 2007 to 2010. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is NTK 21559 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. NTK 21559 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.
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