NTK 25697 Air / Fuel Ratio Sensor - Upstream, Upstream Front or Upstream Rear
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NTK
 Direct Fit 4-Wire A/F Sensor

NTK 25697 Air / Fuel Ratio Sensor - Upstream, Upstream Front or Upstream Rear

Brand NTK 25697
Position Upstream Rear, Upstream Front, and Upstream
Wiring Harness Length 13.8
Sensor Type Heated
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 4
Thread Diameter 18.000
Mounting Bracket Included No
Product line Direct Fit 4-Wire A/F Sensor
Fits Lexus and Toyota · 43 vehicles

Direct-fit design. Specific-fit replacement for select air/fuel ratio sensor applications.

Heated sensor. Reaches operating temperature quickly for responsive exhaust feedback.

OE-spec testing. Manufactured and tested to meet or exceed OE specifications.

Cross-references Bosch 15217, DENSO Auto Parts 234-9007 and DENSO Auto Parts 234-9009 for the same application. See all 9.

$266.84Free shipping
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Direct-fit air/fuel ratio sensor

NTK 25697 is a specific-fit, heated air/fuel ratio sensor built for import applications that require OE-style signal control and direct-fit installation. It is part of NTK’s Direct Fit 4-Wire A/F Sensor line and is engineered for accurate replacement service on select Lexus and Toyota models.

  • Specific-fit replacement for select air/fuel ratio sensor applications
  • Heated sensor design for faster operating readiness
  • 4-wire configuration for the correct electrical interface
  • 18 mm thread diameter with 0.38 thread length
  • 13.8 wiring harness length for application-specific routing

Fitment and application details

Compatible with 1997-2003 Lexus RX300, 1998-1999 Lexus ES300, 1997-1999 Toyota Avalon, 1998-2000 Toyota Camry, 1998 Toyota RAV4, 1999-2000 Toyota Sienna, 1999-2000 Toyota Solara, and 2001-2003 Toyota Highlander. Fitment includes upstream front, upstream rear, and upstream positions depending on the vehicle and emissions configuration. Fits 1998-2000 Toyota Camry, upstream front; Fits 1999-2003 Lexus RX300, upstream rear; Fits 2001-2003 Toyota Highlander, upstream front.

This part cross-references Bosch 15217 and DENSO Auto Parts 234-9007 for the same application.

What this sensor helps address

  • Fault codes related to air/fuel ratio sensor performance
  • Rough idle caused by inaccurate exhaust feedback
  • Fuel trim issues from a slow or weak sensor signal
  • Emissions test failures tied to sensor response problems
  • Replacement needs for worn or contaminated OE-style sensors

Installation notes and quality

Use the vehicle’s fitment notes to confirm the correct upstream location and emissions configuration before installation. The 4-wire heated design and specific-fit construction support a direct replacement process on covered Lexus and Toyota applications.

NTK is a major OE oxygen sensor supplier, and this sensor is manufactured and tested to meet or exceed OE specifications for fit, form, and function.

Related reading

This part fits 43 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2003LexusRX3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2003LexusRX3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2003ToyotaHighlander3.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2003ToyotaHighlander3.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2002LexusRX3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2002LexusRX3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2002ToyotaHighlander3.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2002ToyotaHighlander3.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2001LexusRX3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2001LexusRX3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2001ToyotaHighlander3.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2001ToyotaHighlander3.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2000LexusRX3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
2000LexusRX3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
2000ToyotaCamry3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaCamry3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaRAV42.0LL4UpstreamB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaSienna3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaSienna3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaSolara3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
2000ToyotaSolara3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999LexusES3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
1999LexusES3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
1999LexusRX3003.0LV6Upstream RearOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 4-Wire A/F Sensor
1999LexusRX3003.0LV6Upstream FrontCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 4-Wire A/F Sensor
1999ToyotaAvalon3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaAvalon3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaCamry3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaCamry3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaRAV42.0LL4UpstreamB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaSienna3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaSienna3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaSolara3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1999ToyotaSolara3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998LexusES3003.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998LexusES3003.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998ToyotaAvalon3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998ToyotaAvalon3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998ToyotaCamry3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998ToyotaCamry3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1998ToyotaRAV42.0LL4UpstreamB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1997ToyotaAvalon3.0LV6Upstream RearB1S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
1997ToyotaAvalon3.0LV6Upstream FrontB2S1; Calif. Emissions; OE Equivalent Design; Direct Fit 4-Wire A/F Sensor
Directly replaces or cross-references 9 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 15217DENSO Auto Parts — 234-9007DENSO Auto Parts — 234-9009Spectra Premium — OS5109Spectra Premium — OS52948946741011894674102189467420308946748011