NTK
Direct Fit Oxygen Sensor

NTK 25233 Oxygen Sensor - Downstream

Brand NTK 25233
Position Downstream
Wiring Harness Length 42.76
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 Audi · 3 vehicles

Direct-fit design. Specific replacement for application-matched oxygen sensor service.

Heated sensor. Helps the sensor reach operating temperature faster for stable exhaust feedback.

OE-level testing. Manufactured and checked to meet or exceed original equipment specifications.

Cross-references 04E906262CH for the same application. See all 1.

$113.42Free shipping
In stock · usually ships same day before 1pm CST
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Free returns within 60 days if it doesn't fit when fitment is verified.

Direct-Fit Oxygen Sensor

NTK 25233 is a direct-fit heated oxygen sensor built for specific applications with threaded mounting and a 4-wire design. It is engineered for downstream placement and supports accurate exhaust monitoring in compatible Audi applications.

  • Heated oxygen sensor for faster operating response.
  • Specific-fit design for direct replacement applications.
  • Threaded mounting with an 18.000 mm thread diameter.
  • 42.76 wiring harness length for application-specific routing.

Fitment Details

Fits 2017-2018 Audi A3 Sportback e-tron, downstream. Fits 2016 Audi A3 Sportback e-tron, downstream.

This part cross-references 04E906262CH for the same application.

What It Helps Address

  • Faulty oxygen sensor readings.
  • Check engine light concerns related to exhaust feedback.
  • Improper air-fuel ratio control.
  • Slow sensor response in heated sensor circuits.

Installation Notes

Use the threaded mounting style and harness length to confirm application match before installation. Verify connector routing and exhaust location against the original sensor on the vehicle.

Quality Assurance

NTK is part of the NGK family of products and is recognized as a major original equipment oxygen sensor supplier. NTK oxygen sensors are manufactured and tested to meet or exceed OE specifications for fit, form, and function.

This part fits 3 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2018AudiA3 Sportback e-tron1.4LL4DownstreamOE MFR: NTK; Direct Fit Oxygen Sensor
2017AudiA3 Sportback e-tron1.4LL4DownstreamOE MFR: NTK; Direct Fit Oxygen Sensor
2016AudiA3 Sportback e-tron1.4LL4DownstreamB1S2 oxygen sensor meets OEM standards.; Direct Fit Oxygen Sensor
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
04E906262CH