NTK 27100 Air / Fuel Ratio Sensor - Upstream
OE Quality 60-Day Returns
NTK
 Direct Fit 5-Wire A/F Sensor

NTK 27100 Air / Fuel Ratio Sensor - Upstream

Brand NTK 27100
Position Upstream
11589 Metric
Heated Yes
Wiring Harness Length 19.75
Wiring Harness Length 504.00
Sensor Type Wide-band
Connector Color Black
Terminal Type Blade
Thread Length 7.00
Universal Or Specific Fit Specific
Wire Quantity 5
Grade Type Standard replacement
Connector Shape Rectangular
Terminal Quantity 6
Connector Gender Female
Terminal Gender Male
Thread Size M18 - 1.5
Mounting Bracket Included No
Heated Yes
Hex Size 7/8" (22mm)
Technology 5-wire a/f sensor
Product line Direct Fit 5-Wire A/F Sensor
Fits Mercedes-Benz · 119 vehicles

Direct-fit replacement. Specific application sensor for straightforward installation and OE-style fit.

Wide-band design. Provides linear air-fuel feedback for precise ECU mixture control.

Heated sensor. Reaches operating temperature quickly for stable signal response.

Cross-references 0005422404 and 0005424300 for the same application. See all 2.

$103.06Free shipping
In stock · usually ships same day before 1pm CST
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Order total $103.06
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all Air / Fuel Ratio Sensor options

Direct-Fit Air/Fuel Ratio Sensor

NTK 27100 is a direct-fit, specific application wide-band air/fuel ratio sensor for upstream use. It is built for Mercedes-Benz applications that rely on precise air-fuel feedback for engine management and emissions control.

  • Direct-fit, specific application sensor for straightforward replacement
  • Wide-band A/F sensor with linear output for precise ECU fuel-trim control
  • Heated design for faster sensor operation and stable signal response
  • Metric M18 x 1.5 thread with 7/8 in. hex size
  • 5-wire design with rectangular female connector and black housing

Fitment and Application Details

Compatible with upstream Mercedes-Benz applications including the C300, E350, GLC300, GLE350, and GLS450. Fits 2019-2024 Mercedes-Benz C300, upstream; Fits 2020-2024 Mercedes-Benz E350, upstream; Fits 2020-2024 Mercedes-Benz GLC300, upstream; Fits 2020-2024 Mercedes-Benz GLE350, upstream; Fits 2020-2025 Mercedes-Benz GLS450, upstream. This part cross-references Mercedes-Benz OE numbers 0005422404 and 0005424300 for the same application.

What It Helps Address

  • Fault codes related to air-fuel ratio sensor performance
  • Rough idle or drivability issues tied to inaccurate mixture feedback
  • Reduced fuel economy caused by incorrect air-fuel correction
  • Elevated emissions from poor combustion control
  • Delayed or unstable upstream sensor response

Installation Notes and Quality

Use the correct metric thread engagement and connector orientation during installation. Verify the upstream sensor location and match the connector style before replacement. NTK is a major OEM oxygen sensor supplier and uses in-house ceramics technology to control wide-band sensor production from raw material through finished component.

Related reading

This part fits 119 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
2025Mercedes-BenzCLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2025Mercedes-BenzCLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2025Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2025Mercedes-BenzS5003.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzC3002.0LL4MILD HYBRID EV-GAS (MHEV)UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzC43 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzC63 AMG S E Performance2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzCLE3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzCLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzCLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzGLC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzGLC43 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzGLE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzGLE450e2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzS5003.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzS580e3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2024Mercedes-BenzSL43 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzAMG GT 433.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzAMG GT 533.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzC43 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzCLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzCLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzCLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzCLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzCLS53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLB2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLB35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzS5003.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzS580e3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2023Mercedes-BenzSL43 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzA2202.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzAMG GT 433.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzAMG GT 533.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzCLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzCLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzCLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzCLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzCLS53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLB2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLB35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2022Mercedes-BenzS5003.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzA2202.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzAMG GT 433.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzAMG GT 533.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzCLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzCLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzCLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzCLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzCLS53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLB2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLB35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2021Mercedes-BenzS5003.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzA2202.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzAMG GT 533.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzCLA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzCLA35 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzCLA45 AMG2.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzCLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzCLS53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLB2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLC3002.0LL4GASUpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLE3502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLE4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2020Mercedes-BenzGLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzA2202.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzA2502.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzAMG GT 533.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzC3002.0LL4—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzCLS4503.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzCLS53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
2019Mercedes-BenzE53 AMG3.0LL6—UpstreamOE MFR: NTK; Direct Fit 5-Wire A/F Sensor
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
00054224040005424300