Second Hand Peugeot 107 Lambda Sensor

Yes, but only on petrol-engined 107s — the 1.0-litre (1KR-FE engine code) and 1.4-litre (ETU/KFU engine codes) petrol variants all use a lambda sensor as part of their emissions management system. The 107 was never sold in the UK with a diesel engine, so every UK 107 is petrol and will have one. It sits in the exhaust system, typically upstream of the catalytic converter, and tells the ECU how to adjust the fuel mixture.

The Peugeot 107 ran from 2005 to 2014 in the UK, with a facelift arriving in 2012, so a 2006 sensor and a 2012 sensor sit either side of that boundary. The key thing to match is the engine code — if both cars share the same engine code (for example both are 1.0 1KR-FE), the sensor itself is often the same unit, but the facelift brought revised emissions calibration and you should confirm with the breaker that the connector, thread pitch, and cable length match your exact registration before buying.

No — trim level makes no difference to lambda sensor fitment on the 107; the sensor is determined by the engine code and model year, not whether the car is a base Urban or a Millesim special edition. You may find cosmetic differences between donor cars (different body colour, interior spec) but none of that affects the exhaust or sensor. Just confirm the engine code matches your own car.

The Peugeot 107, Toyota Aygo, and Citroën C1 were all built on the same PSA/Toyota platform and share the 1KR-FE and ETU engine families, so lambda sensors often do cross over between these three models. In practice many breakers and parts suppliers list them as shared fitment, but connector types and cable routing can differ depending on which manufacturer installed the sensor, so confirm with the breaker that the part from a donor Aygo or C1 matches your 107's engine code and connector before committing.

The 107's petrol engines typically run a single upstream (pre-cat) lambda sensor in UK specification, but some later Euro 5 compliant cars (from around 2011 onwards) may also carry a downstream sensor after the catalytic converter to monitor catalyst efficiency. Check your existing sensor's position in the exhaust — upstream sensors are closer to the engine, downstream sensors are closer to the rear of the car — and tell the breaker which position you need along with your engine code and year, as the two sensors are not interchangeable with each other.

The 2012 facelift was primarily cosmetic and the engine family carried over, so for the same engine code the lambda sensor specification is often unchanged across the facelift boundary. That said, emissions calibration updates between model years can affect sensor specification, and fitting the wrong sensor could cause fault codes or an MOT emissions failure, so always confirm with the breaker against your full registration number rather than assuming year-to-year compatibility.