Oxygen Sensor
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Oxygen Sensor Oxygen Sensor
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NTK Oxygen Sensor

Part No. 21508 Warranty Details  

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Highly sensitive zirconia sensing element, ceramic heater, OE style connector, superior robust structure. Faster response times, OEM installation, reliability and durability. Meets or exceeds all emission standards.
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Connector Type:OE Type
Exact Fit:Yes
Length (Sealing Surface To End Of Connector):20.5 in
O.E.M. Number:91177408
Thread Size:18 mm
Wire Quantity:4


by PowerReviews
NTKOxygen Sensor

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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Absolutely Thrilled


from niantic, ct

About Me Casual Driver

Verified Buyer


  • Easy to install


    Best Uses

    • Small Cars

    Comments about NTK Oxygen Sensor:

    Love it! It only took 100,000 miles to find out this sensor would clear my engine light for good.

    • Was this a gift?:
    • No

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