Mercedes-Benz GLE Lambda Sensor Replacement Parts

Yes, but only on petrol-engined GLE variants — the lambda (oxygen) sensor sits in the exhaust system and helps the ECU manage the air-fuel mixture on petrol engines. Diesel GLE models (the 250d, 300d, 350d, 400d and 63d AMG) do not use lambda sensors in the same way, relying instead on NOx and other sensors for emissions management. If your GLE is diesel and you've been quoted for a lambda sensor, it's worth double-checking with the breaker that they have the correct sensor type for your engine.

The GLE ran as the W166 from 2015 to 2019, then moved to the all-new V167 platform from 2019 onwards — these are fundamentally different generations with different engines, exhaust layouts, and sensor specifications. A lambda sensor from a W166 petrol (for example, the 400 or 43 AMG) is very unlikely to be a straight swap onto a V167 petrol (such as the 450 or 53 AMG) even if the connectors look similar. Always confirm the engine code and build year of both the donor vehicle and your own car with the breaker before buying.

No — trim level makes no difference to lambda sensor fitment on the GLE; AMG Line, Sport, and any other trim designation are cosmetic and equipment packages only, not changes to the engine or exhaust system. What matters is the engine code (for example, M276 on the 400 petrol, or M256 on later V167 variants) and the emissions standard the vehicle was built to. Two GLE 400s with the same engine code — one Sport, one AMG Line — will use the same sensor, so focus your search on engine code rather than trim name.

The W166 received a mid-cycle facelift around 2018-2019, but the core petrol engines and their exhaust configurations carried over, which means lambda sensor compatibility is plausible between the two phases. However, because sensor part numbers can change across a production refresh, you should confirm the exact engine code and sensor position (upstream or downstream of the catalytic converter) with the breaker and cross-reference against your registration plate rather than assuming it will be identical.

The GLE 350e uses a petrol engine combined with an electric motor, and its exhaust system does include lambda sensors as part of the petrol engine's emissions management — so the sensor does exist on this variant. However, because the hybrid drivetrain can alter exhaust routing and sensor positioning compared with the equivalent non-hybrid petrol, you should not assume the sensor from a standard GLE 350 petrol will be a direct match. Confirm the engine code and exact sensor location with the breaker, quoting your registration, before purchasing a used unit.

Yes, this matters significantly: the upstream (pre-cat) sensor and the downstream (post-cat) sensor have different jobs and often different part numbers, even on the same engine. On GLE petrol engines there can be multiple sensors across the two exhaust banks on V6 and V8 units, so specifying whether you need the NS or OS bank sensor, and whether it is upstream or downstream, will help the breaker supply the correct unit. Give the breaker your registration and describe the sensor's location in the exhaust run to avoid ending up with the wrong one.