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NTK Performance Oxygen Sensor; Upstream; Front (99-09 Mustang V6; 99-04 4.6L Mustang)

Item 64044
AmericanMuscle no longer carries the NTK Performance Oxygen Sensor; Upstream; Front (99-09 Mustang V6; 99-04 4.6L Mustang). Please check out 1979-1993 Foxbody Mustang O2 Sensors, Oxygen Sensors for an updated selection.
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    Video Review & Installation

    The NTK Performance Oxygen Sensor is available for any '99 to '09 V6 owner and '99 to '04 4.6 liter owner, who's in need of a replacement for a bad front sensor in order to turn off the check engine light, and improve engine performance and exhaust flow. It's a pretty inexpensive upgrade coming in right under the $30 mark for this sensor. The installation doesn't take too much to complete, so, expect one out of three wrenches on our difficulty meter which I'll show you later on. A bad oxygen sensor can be the bane of quite a few issues for your New Edge and early S197. If you're experiencing a poor performance, like engine bogging down, feeling sluggish, or if you've got a lousy fuel economy and the check engine light is on, then you probably need a new O2 sensor. If you've got a tuner or a code reader, you'll be able to tell which "X" sensor exactly needs to be replaced, if that's the issue. If you've narrowed it down to a front or upstream sensor, then this is the perfect upgrade here because it is a direct fit replacement. This particular O2 sensor from NTK was designed with a waterproof factory-fitted connector to ensure a long-lasting performance and a perfect fit each time, since it is an OEM styling. With a bad factory O2, you'll most likely fail your local emissions test, if it applies in your area. It is pretty straight forward, so you should be able to tackle this one and take care of it yourself in your driveway. This one, you can pick up currently for just about 26 bucks which isn't a bad price in my opinion. The install, since it is pretty simple, will get one out of three wrenches on our difficulty meter. This shouldn't take longer than about an hour or so. But, I say, you can probably get it done in a little less. You need a jack and jack stand to probably secure the car in the air, and you'll need a ratchet and an O2 sensor socket since it is a specific one, or you could just use a 22 millimeter wrench. Once the Mustang is in the air and it's supported on stands, you can use your O2 sensor socket or wrench to remove the old sensor from the exhaust manifold or headers. Once that's removed, you can unplug the other end from the wiring harness, of course. The NTK Sensor is built to be a direct bolt-on like I said a bunch of times in this video. So, you should be able to just pop it right into the same place using the same tools and plug it into the same stock harness, and you'll be good to go. Just to wrap this one up, if you're the owner of a '99 to '09 V6 or a '99 to '04 4.6 liter Mustang, you might wanna check out the NTK Performance Front Oxygen Sensor, which is available right here at

    Product Information

    Features, Description, Reviews, Q&A, Specs & Installation


    • Regain Lost Power
    • Direct OEM Style Replacement
    • Plug and Play to Factory Harness
    • Front (Upstream) O2 Sensor
    • Sold Individually
    • Fits 99-09 V6, 99-04 GT, 03-04 Mach1, 01 Bullitt, 99-04 Cobra


    Regain Lost Power. A bad oxygen (aka O2) sensor can cause poor performance, lousy fuel economy, the dreaded check engine light, and even cause you to fail emissions testing. So replace those worn out sensors with brand new NTK sensors for superior, consistent performance.
    Exceeds OEM Quality. Designed with a waterproof factory-fitted connector to ensure a perfect fit every time, NTK's oxygen sensors meet or exceed OE specifications and are built with the highest quality materials and craftsmanship to ensure a superior quality direct replacement for your worn or failed OEM sensors.

    This NTK Performance Oxygen Sensor is designed to be a direct performance replacement for the Mustang. please see the NTK Performance Oxygen Sensor - Front (upstream) applications below:
    • 1999 to 2009 V6 Mustangs
    • 1999 to 2004 GT Mustangs
    • 2003 to 2004 Mach 1 Mustangs
    • 2001 Bullitt Mustangs
    • 1999 to 2004 SVT Cobra Mustangs.

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Oxygen Sensor - Front

    Tech Specs


    Customer Reviews (240)

      Questions & Answers

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