NTK 25735 Oxygen Sensor - Downstream
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NTK
 Direct Fit Oxygen Sensor

NTK 25735 Oxygen Sensor - Downstream

Brand NTK 25735
Position Downstream
Wiring Harness Length 14.7500
Sensor Type Heated
Universal Or Specific Fit Specific
Wire Quantity 4
Thread Diameter 18.000
Mounting Type Threaded
Product line Direct Fit Oxygen Sensor
Fits BMW · 4 vehicles

Direct-fit design. Specific application sensor with OE-style fit, form, and function.

Heated 4-wire sensor. Built for emissions feedback with threaded mounting and specific fit.

OE supplier pedigree. NTK is a major original equipment oxygen sensor manufacturer.

Cross-references Bosch 16218, DENSO Auto Parts 234-4478 and 11787603023 for the same application. See all 3.

$89.84Free shipping
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Free returns within 60 days if it doesn't fit when fitment is verified.
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Direct-Fit Oxygen Sensor

NTK 25735 is a direct-fit heated oxygen sensor built for specific applications and threaded mounting. It is engineered for downstream use and uses a 4-wire design with a 14.7500 wiring harness length and 18.000 thread diameter.

As part of NTK's Direct Fit Oxygen Sensor line, this sensor is built to match OE-style fit, form, and function. NTK 25735 is a practical replacement choice for BMW X3 and BMW 528i applications that require a downstream oxygen sensor with the listed connector and thread specifications.

Key Features

  • Direct-fit, specific application oxygen sensor
  • Heated sensor design for emissions system feedback
  • 4-wire configuration with threaded mounting
  • 14.7500 wiring harness length
  • 18.000 thread diameter

Fitment Details

  • Fits 2010-2012 BMW X3, Downstream. Cyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor.
  • Fits 2011 BMW 528i, Downstream. Cyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor.

What It Helps Address

  • Fault codes related to downstream oxygen sensor performance
  • Incorrect air-fuel feedback from a worn sensor
  • Emissions monitoring issues tied to sensor response
  • Connector or fitment mismatch on specific applications

Installation Notes

Use the listed fitment details to confirm the correct downstream application before installation. Verify the threaded mounting style, wire count, harness length, and thread diameter against the original sensor. This part cross-references Bosch 16218 and DENSO Auto Parts 234-4478 for the same application.

Quality Assurance

NTK is a major original equipment oxygen sensor supplier, and this sensor is manufactured and tested to meet or exceed OE specifications for quality and reliability.

Related reading

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelLitersCylindersPositionNotes
2012BMWX3xDrive28i3.0LL6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2011BMW528i—3.0LL6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2011BMWX3xDrive28i3.0LL6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
2010BMWX3xDrive28i3.0LL6DownstreamCyls. 4-6; B2S2; OE Equivalent Design; Direct Fit Oxygen Sensor
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — 16218DENSO Auto Parts — 234-447811787603023