The lambda sensor on a Peugeot 307 is typically located in the exhaust system, specifically before and after the catalytic converter. The upstream (pre-catalytic) sensor is generally found near the engine, attached to the exhaust manifold or pipe, while the downstream (post-catalytic) sensor is positioned after the catalytic converter. Depending on the engine type, the exact placement may vary slightly, so consulting the vehicle's service manual can provide precise details for your specific model.
Year, engine?? Normaly lambda sensor is below exhaust collector
probably
by the camshaft
its the cam shaft sensor or the clutch sensor or both..
Green and red wire on lambdA sensor
Passenger doors mirror
One can find deals on a Peugeot 307 on websites that sell types of Peugeot as well as offline offsite automobile dealers which sell brand new Peugeot 307 and used Peugeot 307.
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The Peugeot 307 is available in the USA as used cars. The Peugeot 307 is available in China and some parts of South America.