NTK
NTK Oxygen Sensor 25155
NTK Oxygen Sensor 25155
Part number: 3Q1BX
Couldn't load pickup availability
- Ships direct from the brand or supplier
- Tracking emailed when it ships
- Free fitment check before you order
Oxygen Sensor 25155 by NTK. Reading the trouble code first points you to the right sensor. The fitment section lists 15 applications.
Specifications
- Brand: NTK
- Part type: Sensor
Fitment
- 2002 - 2005 Hyundai Santa Fe Base
- 2001 - 2006 Hyundai Santa Fe GL, GLS
- 2006 Hyundai Santa Fe Limited
- 2001 - 2005 Hyundai Santa Fe LX
- 1999 - 2004 Hyundai Sonata Base
- 2003 - 2005 Hyundai Sonata GL
- 1999 - 2005 Hyundai Sonata GLS
- 2005 Hyundai Sonata GLX, VE
- 2002 - 2005 Hyundai Sonata LX
- 2001 Hyundai XG300 L, Base
- 2001 - 2004 Kia Magentis Base
- 2005 Kia Magentis LX, LX Anniversary Edition
- 2004 - 2005 Kia Optima EX
- 2001 - 2005 Kia Optima LX
- 2001 - 2003 Kia Optima SE
What it does
A failed sensor usually sets a check-engine code and can cause poor running or wrong readings. Electrical faults often show up as warning lights, rough running or no-start problems, and the right replacement part clears the cause rather than the symptom.
Installation & tips
- Read the code, check the wiring and connector, and clear codes after the new sensor is in.
- Connector and wiring: Corroded connectors mimic a bad sensor.
- Disconnect the battery before you unplug or splice any wiring, and test everything works before you refit trim panels.
FAQ
How many vehicles is it listed for?
15 applications are listed in the fitment section above.
Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.
What should I check before ordering?
Compare the part number, specifications and fitment on this page with your vehicle and with the part you are replacing.
Before you order
- Measure the part you are replacing and compare it with the specifications above.

Before you order: fitment and what to plan
Sensors tell the engine computer what is happening so it can adjust fuel, timing and gauges.
Fitment notes
- Specs, lead time and warranty come from NTK and can change. The details above this guide are the latest we have.
Not sure it fits? Message us your vehicle details and we'll double-check fitment before you buy.
Ask about fitmentPlan the whole job
- Connector and wiring. Corroded connectors mimic a bad sensor.
More for your car: Oxygen (O2) Sensors · Batteries & electrical
Questions about sensor
Will this fit my car?
Will a new sensor clear my check-engine light?
Where do specs and warranty details come from?
Questions & answers
No questions yet about this part. Ask about fitment, what's in the box or installation and we'll answer here.