Used Mercedes-Benz GLB Oxygen Sensor

Yes, but only on petrol-engined GLB variants — the GLB 200, GLB 250, and GLB 35 AMG all use petrol engines that require lambda (oxygen) sensors to manage fuel mixture and emissions. The diesel GLB 200d and GLB 220d variants use a different emissions strategy centred on NOx sensors and do not use traditional oxygen sensors in the same way, so if you have a diesel GLB you may be looking for a NOx sensor or exhaust gas temperature sensor instead. Confirm with the breaker exactly which sensor your diesel variant needs against your registration.

The GLB (X247) launched in 2019 and represents a single generation to date, with a facelift arriving in 2023 that brought updated infotainment and styling tweaks. For petrol variants, the oxygen sensor fitment is primarily driven by engine code rather than the pre- or post-facelift status, so a sensor from a 2020 car may well suit a 2022 car with the same engine, but you should always confirm the engine code matches before assuming it will fit. Ask the breaker to verify against your specific registration.

Both generations share the same basic X247 platform and carry over petrol engine codes such as the M282 and M260, so on paper the sensor position and spec can be very similar across that 2023 facelift boundary. However, emissions calibration updates can accompany a facelift and may mean the sensor spec differs subtly, so crossing that boundary is something you should confirm with the breaker against both registration numbers before buying. Never assume a pre-facelift part is a guaranteed drop-in on a facelifted car without that check.

No — trim level does not affect which oxygen sensor you need on the GLB; Sport, AMG Line, and AMG Line Premium are cosmetic and equipment packages that share the same engine and exhaust configuration for a given engine code. What matters is the engine code (for example M282 on the GLB 200 or M260 on the GLB 250), fuel type, and model year. You may find cosmetic differences on parts sourced from different trim vehicles — such as underbody covers — but the sensor itself is determined by the engine, not the trim badge.

The GLB 200 uses the four-cylinder M282 engine while the GLB 250 uses the more powerful M260 unit, and although both are petrol turbocharged fours these are different engine families with different exhaust setups, so the sensors are unlikely to be a direct swap. You should source a sensor matched to your specific engine code rather than assuming all petrol GLBs share the same part. Ask the breaker to cross-reference the engine code and sensor position (upstream or downstream of the catalytic converter) against your registration to be sure.

Yes, it matters significantly — the upstream (pre-cat) sensor measures oxygen levels to control fuelling, while the downstream (post-cat) sensor monitors catalytic converter efficiency, and they are calibrated differently and are not interchangeable with each other. When contacting a breaker, specify whether you need the NS or OS bank sensor if your engine has more than one upstream sensor, and confirm whether it is pre- or post-catalyst. The breaker should be able to identify the correct sensor position from your registration, but having your engine code to hand will speed up the process.