NTK 21556
NTK part number 21556 is a oxygen (o2) sensor in the Exhaust & Emission system. This catalog matches it to 11 year-and-engine configurations from 2004 to 2016.
Verified fitment includes 2016 Buick Lacrosse 3.6L V6 ; 2014 Buick Lacrosse 3.6L V6 ; 2014 Cadillac Elr 1.4L L4 ELECTRIC/GAS ; 2014 Cadillac SRX 3.6L V6 ; 2013 Buick Lacrosse 3.6L V6 , plus 6 other configurations. See every vehicle this part fits.
Frequently Asked Questions
What is NTK 21556?
NTK part number 21556 is a oxygen (o2) sensor with published application data for 11 vehicle configurations from 2004 to 2016. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.
Which vehicles does NTK 21556 fit?
This catalog matches 21556 to 11 year-and-engine configurations from 2004 to 2016. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.
Is NTK 21556 OEM or aftermarket?
What matters is the published application data for this part number, not the label on the box. NTK 21556 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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