NTK
Direct Fit 5-Wire A/F Sensor

NTK 24318 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Brand NTK 24318
Position Upstream Left, Upstream, and Upstream Right
Wiring Harness Length 59.0
Sensor Type Heated
Thread Length 0.38
Universal Or Specific Fit Specific
Wire Quantity 5
Thread Diameter 18.000
Mounting Bracket Included No
Product line Direct Fit 5-Wire A/F Sensor
Fits Audi, Bentley, and Volkswagen · 104 vehicles

Direct fit replacement. Specific-fit sensor for straightforward installation.

Heated sensor. Helps reach operating temperature quickly for reliable readings.

OE-spec tested. Manufactured to meet or exceed original equipment standards.

Cross-references BBB Industries 17237, Bosch 17158 and Bosch 17250 for the same application. See all 31.

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NTK Direct Fit Air/Fuel Ratio Sensor

NTK Part Number 24318 is a direct fit heated air/fuel ratio sensor built for specific import applications that require OE-style signal accuracy and factory-style connector fitment. It is engineered for upstream use on select Volkswagen, Audi, and Bentley vehicles, including Volkswagen Golf, Jetta, Passat, and Touareg applications.

NTK is known for oxygen and air/fuel ratio sensor coverage across import and domestic platforms, and this Direct Fit 5-Wire A/F Sensor line is designed to match original sensor form, fit, and function for the listed applications.

Key Features

  • Direct fit 5-wire air/fuel ratio sensor for specific applications
  • Heated sensor design for faster operating temperature
  • 59.0 wiring harness length
  • 18.000 thread diameter with 0.38 thread length
  • Specific fit for OE-style replacement on listed upstream positions
  • NTK Part Number 24318 for catalog and service reference

Application Details

Fits 2001-2006 Audi A4, upstream; Fits 2001-2005 Audi A4 Quattro, upstream; Fits 2001-2006 Audi TT, upstream; Fits 2001-2002 Audi TT Quattro, upstream; Fits 2003 Bentley Continental, upstream left; Fits 1999-2006 Volkswagen Golf, upstream; Fits 2007-2010 Volkswagen Golf City, upstream; Fits 2000-2005 Volkswagen Jetta, upstream; Fits 2007-2009 Volkswagen Jetta City, upstream; Fits 2001-2005 Volkswagen Passat, upstream; Fits 2004-2007 Volkswagen Touareg, upstream right; Fits 2004-2007 Volkswagen Touareg, upstream left; Fits 2004-2006 Volkswagen Phaeton, upstream right; Fits 2004-2006 Volkswagen Phaeton, upstream left.

Part number 24318 also cross-references Bosch 17158 for the same application.

What This Sensor Helps Address

  • Check engine light related to air/fuel ratio sensor performance
  • Incorrect upstream sensor readings on Bank 1 Sensor 1 circuits
  • Rough idle or drivability issues tied to fuel mixture control
  • Emissions test failures caused by sensor response problems
  • Hard starting or fuel trim faults linked to aging oxygen sensor hardware

Installation Notes and Tips

Verify the vehicle year, engine, and sensor position before ordering. This sensor is listed for upstream locations only, including Bank 1 Sensor 1 applications and select left or right upstream positions on Touareg and Phaeton models. Confirm the 5-wire connector style, thread diameter, and harness length match the original sensor before installation.

For best results, inspect the exhaust bung threads and wiring routing during replacement. Use the vehicle-specific fitment notes to confirm whether the application is an OE design replacement or an OE-equivalent design for the exact engine code.

Quality Assurance

NTK manufactures oxygen and air/fuel ratio sensors with OE-focused engineering and extensive production testing to help ensure reliable fit, form, and function. As part of the NGK family of products, NTK supports import and domestic coverage with application-specific sensor technology.

This part fits 104 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypeLitersCylindersFuel TypePositionNotes
2010VolkswagenGolf City2.0LL4GASUpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2009VolkswagenGolf City2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2009VolkswagenJetta City2.0LL4GASUpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2008VolkswagenGolf City2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2008VolkswagenJetta City2.0LL4GASUpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2007VolkswagenGolf City2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2007VolkswagenJetta City2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2007VolkswagenTouareg4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2007VolkswagenTouareg4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2006AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006AudiA8 Quattro4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006AudiA8 Quattro4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2006AudiTTFWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenPhaeton4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenPhaeton4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenTouareg4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2006VolkswagenTouareg4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2005AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005AudiA4 Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005AudiA8 Quattro4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005AudiA8 Quattro4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2005AudiTTFWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenBeetle2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenBeetle1.8LL4UpstreamB1S1; AWP Eng; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenJetta1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPassat1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPhaeton6.0LW12UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPhaeton6.0LW12UpstreamCyls. 7-9; B3S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPhaeton6.0LW12UpstreamCyls. 10-12; B4S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPhaeton4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenPhaeton4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenTouareg4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2005VolkswagenTouareg4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2004AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004AudiA4 Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004AudiA8 Quattro4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004AudiA8 Quattro4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2004AudiTTFWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenBeetle2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenBeetle1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenJetta2.0LL4UpstreamB1S1; To Chassis # 9M-3-999-000; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004VolkswagenJetta1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPassat1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPhaeton6.0LW12UpstreamCyls. 10-12; B4S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPhaeton6.0LW12UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPhaeton6.0LW12UpstreamCyls. 7-9; B3S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPhaeton4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenPhaeton4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenTouareg4.2LV8Upstream RightOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2004VolkswagenTouareg4.2LV8Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2003AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003AudiA4 Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003AudiTTFWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003BentleyContinental6.0LW12Upstream LeftCompatible with downstream oxygen sensor designed to meet OE specifications.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenBeetle2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenBeetle1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenEuroVan2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenJetta2.0LL4UpstreamB1S1; BEV Eng; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003VolkswagenJetta2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenJetta1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2003VolkswagenPassat1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002AudiA4 Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002AudiTTFWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002AudiTT QuattroAWD1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenBeetle2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenBeetle1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenEuroVan2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenGolf2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenJetta2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenJetta2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenJetta1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2002VolkswagenPassat1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001AudiA41.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001AudiA4 Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001AudiTT1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001AudiTT Quattro1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenBeetle2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenBeetle1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenEuroVan2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenGolf2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenGolf2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenGolf1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenJetta2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenJetta2.0LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenJetta1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2001VolkswagenPassat1.8LL4UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2000VolkswagenGolf2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2000VolkswagenGolf1.8LL4UpstreamB1S1; AWW Eng; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2000VolkswagenJetta2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
2000VolkswagenJetta2.0LL4UpstreamB1S1; AVH, AZG Engs; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2000VolkswagenJetta1.8LL4UpstreamB1S1; AWW Eng; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
1999VolkswagenGolf2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
1999VolkswagenJetta2.8LV6UpstreamOE design oxygen sensor fits Bank 1 Sensor 1 for air/fuel ratio.; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 31 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 17237Bosch — 17158Bosch — 17250Bosch — 17351Bosch — 17361Carlson — 17229Davico Mfg — 17313DENSO Auto Parts — 234-5045DENSO Auto Parts — 234-5074DENSO Auto Parts — 234-5115Remy — 1719107C906262R75-332475-333275-356975-357475-358475-385475-4053234-5106234-5112234-5121022906265077906262A077906265AB079906262F94860612902OS2404OS2412SG1571SG1579