Second Hand Peugeot 208 Lambda Sensor

Yes, but only on petrol-engined 208s — the lambda sensor (also called an oxygen sensor) is part of the petrol engine management system, sitting in the exhaust to help the ECU control the air-fuel mixture. Diesel 208s do not use a lambda sensor in the same way, so if you have a diesel you are almost certainly looking for a different part, possibly a NOx sensor or an EGR-related component. Check your fuel type before requesting quotes from a breaker.

The Peugeot 208 ran in its first generation from 2012 to 2019, with a facelift around 2015, before the fully redesigned second generation arrived from 2019 onwards. The two generations use different platforms and different petrol engines, so a lambda sensor from a pre-2019 car is very unlikely to be a direct fit on a post-2019 car. Always give the breaker your exact engine code and registration so they can match the correct sensor for your generation.

Yes, engine code is one of the most important things to match — a 1.2 PureTech (EB2 family) and an older 1.4 VTi or 1.6 VTi use different exhaust configurations and sensor connectors, so they are not interchangeable. Within the first generation alone there were several petrol engine variants produced across Euro 5 and Euro 6 emissions standards, and the sensor specification can differ between those eras even on the same displacement engine. Give the breaker your engine code (found on your V5C or inside the engine bay) alongside your registration for the best match.

Trim level — whether Active, Access, Allure, GT Line, or GTi — does not affect lambda sensor fitment on the 208; what matters is the engine code and emissions standard, not the specification level. A GTi uses a different, higher-output version of the 1.6 THP engine compared to standard petrol trims, so if you are buying for a GTi specifically, make sure the breaker knows that rather than just quoting any 1.6 petrol sensor. Aside from that, trim is irrelevant here, though the physical condition and connector style from a used breaker part may vary — confirm the connector type matches yours.

The 2015 facelift refreshed the 208's styling but retained much of the same engine lineup, so on matching engine codes there is a reasonable chance of compatibility within the first generation — however the facelift period also saw the transition from Euro 5 to Euro 6 compliance on some engines, which can mean differences in sensor specification. Because an incorrect sensor can cause engine management faults or an MOT emissions failure, you should confirm with the breaker that the donor car's engine code and emissions standard match yours exactly rather than assuming year proximity means compatibility. A good breaker will cross-reference against your registration to be sure.

Most petrol 208s have at least two lambda sensors — one upstream (pre-cat, sometimes called the front or wideband sensor) and one downstream (post-cat, used to monitor catalytic converter efficiency) — and the two are different parts that are not interchangeable with each other. When searching or requesting quotes, specify whether you need the upstream or downstream sensor, as breakers will need to know this to pull the correct unit from a donor car. If you are unsure which one has failed, your garage or a code reader pointing to a specific sensor bank and position will tell you before you order.