NTK 24315 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 24315 Air / Fuel Ratio Sensor - Upstream

Brand NTK 24315
Position Upstream
Wiring Harness Length 39.3
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 BMW · 42 vehicles

Direct-fit design. Application-specific replacement for the listed sensor locations.

Heated 5-wire sensor. Built for precise exhaust feedback and stable signal performance.

OE-focused engineering. NTK applies ceramic sensor technology and manufacturing controls.

Cross-references BBB Industries 17215, Davico Mfg 17216 and DENSO Auto Parts 234-5137 for the same application. See all 8.

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Not what you need? See all Air / Fuel Ratio Sensor options

Direct-Fit BMW Upstream Sensor

NTK 24315 is a direct-fit air/fuel ratio sensor for select BMW applications. It uses a 5-wire heated design and specific-fit construction to match the original sensor layout for the listed upstream positions.

Key Features

  • Direct-fit replacement for the specified BMW upstream applications
  • Heated air/fuel ratio sensor with 5-wire configuration
  • Specific-fit design for OE-style installation and signal response
  • 18.000 mm thread diameter and 0.38 thread length
  • 39.3 wiring harness length for proper routing
  • NTK 24315 is built for import and domestic sensor applications

Detailed Description

NTK 24315 is an upstream air/fuel ratio sensor engineered for select BMW 325i, 325Ci, 330i, 330Ci, 525i, 530i, and X3 applications. The sensor is part of NTK’s Direct Fit 5-Wire A/F Sensor line, which focuses on OE-style replacement geometry and application-specific coverage. NTK 24315 is designed to match the original sensor configuration for the listed BMW fitments, including Bank 1 Sensor 1 and the corresponding upstream locations noted in the catalog data.

NTK uses ceramic sensor technology and manufacturing controls developed from its OE sensor background. This part cross-references DENSO Auto Parts (e.g., 234-5137) for the same application.

What It Is Used For

  • Replacing a failed upstream air/fuel ratio sensor
  • Addressing check engine lights related to mixture control
  • Restoring accurate exhaust feedback to the engine management system
  • Correcting drivability issues caused by slow or inaccurate sensor response
  • Supporting proper fuel control on BMW 325i, 330i, and related models

Installation Notes and Tips

Verify the exact year, model, and upstream position before ordering. This sensor is specific fit, so connector style, thread size, and harness length should be matched to the original unit. The catalog lists no mounting bracket included.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also notes its role as a major OE sensor supplier, with application coverage built around fit, form, and function.

Related reading

This part fits 42 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersPositionNotes
2006BMW325Ci—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2006BMW325Ci—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2006BMW330Ci—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2006BMW330Ci—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2006BMWX3Automatic3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2006BMWX3Automatic3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW325Ci—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW325Ci—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW325i—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW325i—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW330Ci—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW330Ci—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW330i—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW330i—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW525i—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW525i—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW530i—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMW530i—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMWX3Automatic3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2005BMWX3Automatic3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW325Ci—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW325Ci—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW325i—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW325i—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW330Ci—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW330Ci—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW330i—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW330i—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW525i—2.5LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW525i—2.5LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW530i—3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMW530i—3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMWX3Automatic3.0LL6UpstreamCyls. 4-6; B2S1; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2004BMWX3Automatic3.0LL6UpstreamCylinders 1-3, Bank 1 Sensor 1, OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW325Ci—2.5LL6UpstreamCyls. 4-6; B2S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW325Ci—2.5LL6UpstreamCyls. 1-3; B1S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW325i—2.5LL6UpstreamCyls. 4-6; B2S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW325i—2.5LL6UpstreamCyls. 1-3; B1S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW330Ci—3.0LL6UpstreamCyls. 4-6; B2S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW330Ci—3.0LL6UpstreamCyls. 1-3; B1S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW330i—3.0LL6UpstreamCyls. 4-6; B2S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
2003BMW330i—3.0LL6UpstreamCyls. 1-3; B1S1; From 3/03; OE Equivalent Design; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
BBB Industries — 17215Davico Mfg — 17216DENSO Auto Parts — 234-513775-357975-35801178752343411787523435ES10928