Second Hand Mercedes-Benz CLA Lambda Sensor

Yes, but only on petrol-engined CLA variants — lambda sensors (also called oxygen sensors) are part of the exhaust management system on petrol engines and are not fitted to diesel models, which use different emissions monitoring technology. If your CLA is a diesel (CDI), you will not have a lambda sensor and may be looking for something else such as a NOx sensor or exhaust temperature sensor instead. Check your V5 or registration plate lookup to confirm whether your CLA is petrol or diesel before searching.

The CLA ran in two generations — the C117 (2013 to 2019, with a facelift in 2016) and the C118 (2019 onwards) — and these are distinct platforms with different engine configurations, so a sensor from one generation is very unlikely to fit the other. Even within a generation, fitment depends on the specific engine code, so the year alone is not enough to confirm compatibility. Always give the breaker your full registration so they can match against the correct engine code.

Trim level and badging do not affect lambda sensor fitment, but the engine code does — the CLA 200, CLA 250, and CLA 45 AMG all use different petrol engines, so they will require different sensors even within the same generation. When sourcing a used sensor, match on engine code rather than trim name, and confirm this with the breaker against your registration. Cosmetically, sensors look similar across variants, so do not assume a visually identical part is the correct one.

The C117 generation ran from 2013 with a facelift in 2016, so a 2015 car sits in the pre-facelift phase alongside 2013 and 2014 models — on that basis a sensor from the same engine code is more likely to be compatible than one from across the facelift boundary. However, emissions calibration and sensor specification can vary even within the same body generation, so this is still worth confirming with the breaker using your exact engine code and registration rather than relying on year alone. Never assume fitment based on year without cross-referencing the engine code.

Yes, this matters — the CLA transitioned from Euro 5 to Euro 6 compliance during the C117 generation, and the lambda sensor forms part of the emissions control system, so a sensor calibrated for one emissions era may not work correctly or could cause an MOT failure if fitted to a car from a different era. The safest approach is to confirm the emissions standard of the donor vehicle with the breaker and match it to your own car's registration details. A visually identical sensor from the wrong emissions era is a common and costly mistake.

The CLA Shooting Brake (estate-bodied variant of the C118 generation) and the CLA saloon share engine families, so compatibility is theoretically possible where the engine codes match — but body style itself does not influence lambda sensor fitment. What matters is that the engine code, fuel type, and emissions specification are identical between the donor and your car. Confirm this with the breaker against both registrations before purchasing.