Bosch 17339 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Bosch OE Wideband Oxygen Sensor

Bosch Part Number 17339 is an Actual OE Oxygen Sensor built for precise air-fuel ratio monitoring in Mercedes-Benz applications. This wideband sensor provides the ECU with detailed lambda data for accurate mixture control, stable drivability, and lower emissions across changing load conditions.

Compatible With Mercedes-Benz GLE580, GLS580, GLE63 AMG S, GLS63 AMG, Maybach GLS600, AMG GT 63, E63 AMG S, GLC43 AMG, Metris, S560, S63 AMG, Maybach S560, S450, GLE400, GLE43 AMG, GLE350, GLE550e, GLE550, CLS400, GL450, GL550, GL63 AMG, GLE450 AMG, E400, ML400, ML550, ML63 AMG, and G63 AMG applications that use an upstream left, upstream right, or upstream sensor position.

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster light-off and stable operation
• Specific-fit replacement with 5-wire harness and 6-terminal connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing and ceramic sensor construction for thermal durability
• Wiring harness included with 13.8 in wire length and 10.8 in harness length

OE-Style Performance and Fitment

Bosch pioneered the wideband A/F oxygen sensor design used in modern engine management, and the 17339 follows that OE development path with fast response and heater control tuned for demanding operating conditions. It is a direct replacement for Mercedes-Benz upstream oxygen sensor locations where accurate feedback is needed for fuel control and emissions management. This part cross-references Bosch 0095425518 for the same application.

Fits 2020-2025 Mercedes-Benz GLE580, upstream left; fits 2021-2025 Mercedes-Benz GLE63 AMG S, upstream left; fits 2021-2025 Mercedes-Benz GLE63 AMG S SUV, upstream left; fits 2025 Mercedes-Benz GLS580, upstream left; fits 2025 Mercedes-Benz GLS63 AMG, upstream left; fits 2021 Mercedes-Benz GLS63 AMG, upstream left; fits 2021-2025 Mercedes-Benz Maybach GLS600, upstream left; fits 2023-2024 Mercedes-Benz AMG GT 63, upstream left; fits 2019-2021 Mercedes-Benz AMG GT 63, upstream left; fits 2020-2024 Mercedes-Benz GLS580, upstream right; fits 2022-2024 Mercedes-Benz GLS63 AMG, upstream right; fits 2023 Mercedes-Benz AMG GT 63 S, upstream left; fits 2019-2021 Mercedes-Benz AMG GT 63 S, upstream left; fits 2023 Mercedes-Benz E63 AMG S, upstream left; fits 2018-2021 Mercedes-Benz E63 AMG S, upstream left; fits 2017-2023 Mercedes-Benz GLC43 AMG, upstream right; fits 2016-2023 Mercedes-Benz Metris, upstream; fits 2018-2021 Mercedes-Benz S560, upstream left; fits 2018-2021 Mercedes-Benz S63 AMG, upstream left; fits 2018-2020 Mercedes-Benz Maybach S560, upstream left; fits 2018-2020 Mercedes-Benz S450, upstream right; fits 2016-2019 Mercedes-Benz GLE400, upstream right; fits 2017-2019 Mercedes-Benz GLE43 AMG, upstream right; fits 2016-2019 Mercedes-Benz GLE63 AMG, upstream; fits 2016-2019 Mercedes-Benz GLE63 AMG S, upstream; fits 2017-2019 Mercedes-Benz GLS450, upstream right; fits 2017-2019 Mercedes-Benz GLS550, upstream; fits 2017-2019 Mercedes-Benz GLS63 AMG, upstream; fits 2014-2018 Mercedes-Benz G63 AMG, upstream; fits 2016-2018 Mercedes-Benz GLE350, upstream; fits 2016-2018 Mercedes-Benz GLE550e, upstream right; fits 2016-2017 Mercedes-Benz GLE550, upstream; fits 2015-2016 Mercedes-Benz CLS400, upstream; fits 2015-2016 Mercedes-Benz GL450, upstream right; fits 2013-2016 Mercedes-Benz GL550, upstream; fits 2013-2016 Mercedes-Benz GL63 AMG, upstream; fits 2016 Mercedes-Benz GLE450 AMG, upstream right; fits 2014-2015 Mercedes-Benz E400, upstream; fits 2015 Mercedes-Benz ML400, upstream right; fits 2012-2015 Mercedes-Benz ML550, upstream; fits 2012-2015 Mercedes-Benz ML63 AMG, upstream; fits 2013-2014 Mercedes-Benz GL450, upstream.

Common Symptoms This Sensor Can Address

• Check engine light related to oxygen sensor or air-fuel ratio monitoring
• Rough idle or inconsistent throttle response from inaccurate mixture feedback
• Reduced fuel economy caused by poor upstream sensor data
• Elevated emissions from delayed or incorrect fuel control
• Driveability issues during acceleration, load changes, or cold start operation

Installation Notes

Confirm the upstream left, upstream right, or upstream location before ordering, since Mercedes-Benz applications in this range use different sensor positions. Verify the 18 mm thread size, 22 mm hex, 6-terminal connector, and oblong male connector shape against the original sensor. Inspect the harness routing and connector lock before installation, and clear diagnostic trouble codes after the repair if required by the vehicle.

Quality Assurance

Bosch supplies OE-level oxygen sensor technology backed by more than five decades of engine management development. Part Number 17339 is built as a standard replacement wideband sensor for precise feedback in Mercedes-Benz emission control systems.