Peugeot 207 Lambda Sensor Replacement Parts

Yes, but only on petrol-engined 207s — lambda sensors (also called oxygen sensors) are a core part of the closed-loop fuelling system on petrol engines. Diesel 207s do not use a lambda sensor in the same way, so if your 207 is diesel you are unlikely to need one. Check your registration to confirm your fuel type before ordering.

The 207 ran from 2006 through to 2014, with a facelift arriving around 2009, but the key fitment factor for a lambda sensor is the engine code rather than the model year alone. Sensors are matched to the exhaust and emissions calibration of a specific engine, and a visually similar sensor from a different engine code may not give correct readings even if it physically connects. Give the breaker your engine code — found on your V5C or visible on the engine — and they can check against their donor car before you commit.

Yes, engine size and engine code both matter because different engines use sensors calibrated to their specific fuelling and emissions maps. A 1.4 VTi and a 1.6 VTi, for example, will not necessarily share the same sensor even though both are petrol. Always quote your exact engine code to the breaker rather than just the displacement.

No, trim level does not affect lambda sensor fitment on the 207 — Access, Sport, Allure, and GT variants sharing the same engine code will use the same sensor. The trims differ in interior and exterior equipment, not in exhaust or engine specification. Focus purely on matching the engine code and fuel type when sourcing from a breaker.

The 2009 facelift brought some engine and emissions updates to the 207 range, and whether a sensor crosses that boundary safely depends on whether the specific engine code and emissions calibration remained unchanged across it. Name the facelift year boundary to your breaker, give them both the donor car's registration and your own engine code, and let them verify the sensor part number matches before you buy. A sensor from the wrong emissions era may fit physically but cause fuelling or MOT issues.

Most petrol 207s have at least one lambda sensor positioned before the catalytic converter (the upstream or pre-cat sensor), and some variants also have a downstream sensor after the cat used to monitor catalyst efficiency. The two positions are not interchangeable, so tell the breaker whether you need the upstream or downstream sensor and confirm the engine code. If you are unsure which has failed, a diagnostic scan will identify the faulty sensor by its position in the system.